Angular Gantt Methods

This section describes methods that control the Gantt UI component.

assignResourceToTask(resourceKey, taskKey)

Assigns a resource to a task.

Parameters:
resourceKey:

Object

The resource key.

taskKey:

Object

The task key.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.assignResourceToTask("resource_key","task_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.assignResourceToTask("resource_key","task_key"); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.assignResourceToTask("resource_key","task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.assignResourceToTask("resource_key","task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.assignResourceToTask("resource_key","task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.assignResourceToTask("resource_key","task_key");
        // ...
    }
</script>
See Also

beginUpdate()

Prevents the UI component from refreshing until the endUpdate() method is called.

The beginUpdate() and endUpdate() methods prevent the UI component from excessive updates when you are changing multiple UI component settings at once. After the beginUpdate() method is called, the UI component does not update its UI until the endUpdate() method is called.

See Also
jQuery
Angular
Vue
React

collapseAll()

Collapses all tasks.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.collapseAll();
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.collapseAll(); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.collapseAll();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.collapseAll();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseAll();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseAll();
        // ...
    }
</script>
See Also

collapseTask(key)

Collapses a task.

Parameters:
key:

Object

The task key.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.collapseTask("task_key");
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";  

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.collapseTask("task_key"); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.collapseTask("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.collapseTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseTask("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.collapseTask("task_key");
        // ...
    }
</script>
See Also

defaultOptions(rule)

Specifies the device-dependent default configuration properties for this component.

Parameters:
rule:

Object

The component's default device properties.

Object structure:
Name Type Description
device

Device

|

Array<Device>

|

Function

Device parameters.
When you specify a function, get information about the current device from the argument. Return true if the properties should be applied to the device.
options

Object

Options to be applied.

defaultOptions is a static method that the UI component class supports. The following code demonstrates how to specify default properties for all instances of the Gantt UI component in an application executed on the desktop.

jQuery
JavaScript
DevExpress.ui.dxGantt.defaultOptions({ 
    device: { deviceType: "desktop" },
    options: {
        // Here go the Gantt properties
    }
});
Angular
TypeScript
import Gantt, { Properties } from "devextreme/ui/gantt";
// ...
export class AppComponent {
    constructor () {
        Gantt.defaultOptions<Properties>({
            device: { deviceType: "desktop" },
            options: {
                // Here go the Gantt properties
            }
        });
    }
}
Vue
<template>
    <div>
        <DxGantt id="gantt1" />
        <DxGantt id="gantt2" />
    </div>
</template>
<script>
import DxGantt from "devextreme-vue/gantt";
import Gantt from "devextreme/ui/gantt";

Gantt.defaultOptions({
    device: { deviceType: "desktop" },
    options: {
        // Here go the Gantt properties
    }
});

export default {
    components: {
        DxGantt
    }
}
</script>
React
import dxGantt from "devextreme/ui/gantt";
import Gantt from "devextreme-react/gantt";

dxGantt.defaultOptions({
    device: { deviceType: "desktop" },
    options: {
        // Here go the Gantt properties
    }
});

export default function App() {
    return (
        <div>
            <Gantt id="gantt1" />
            <Gantt id="gantt2" />
        </div>
    )
}

deleteDependency(key)

Deletes a dependency.

Parameters:
key:

Object

The dependency key.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.deleteDependency("dependency_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.deleteDependency("dependency_key"); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.deleteDependency("dependency_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.deleteDependency("dependency_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteDependency("dependency_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteDependency("dependency_key");
        // ...
    }
</script>
See Also

deleteResource(key)

Deletes a resource.

Parameters:
key:

Object

The resource key.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.deleteResource("resource_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.deleteResource("resource_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.deleteResource("resource_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.deleteResource("resource_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteResource("resource_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteResource("resource_key");
        // ...
    }
</script>
See Also

deleteTask(key)

Deletes a task.

Parameters:
key:

Object

The task key.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.deleteTask("task_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.deleteTask("task_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.deleteTask("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.deleteTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteTask("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.deleteTask("task_key");
        // ...
    }
</script>
See Also

dispose()

Disposes of all the resources allocated to the Gantt instance.

jQuery

After calling this method, remove the DOM element associated with the UI component:

JavaScript
$("#myGantt").dxGantt("dispose");
$("#myGantt").remove();
Angular

Use conditional rendering instead of this method:

app.component.html
<dx-gantt ...
    *ngIf="condition">
</dx-gantt>
Vue

Use conditional rendering instead of this method:

App.vue
<template>
    <DxGantt ...
        v-if="condition">
    </DxGantt>
</template>

<script>
import DxGantt from 'devextreme-vue/gantt';

export default {
    components: {
        DxGantt
    }
}
</script>
React

Use conditional rendering instead of this method:

App.js
import React from 'react';

import Gantt from 'devextreme-react/gantt';

function DxGantt(props) {
    if (!props.shouldRender) {
        return null;
    }

    return (
        <Gantt ... >    
        </Gantt>
    );
}

class App extends React.Component {
    render() {
        return (
            <DxGantt shouldRender="condition" />
        );
    }
}
export default App;

element()

Gets the root UI component element.

Return Value:

HTMLElement | jQuery

An HTML element or a jQuery element when you use jQuery.

See Also
jQuery
Angular
Vue
React

endUpdate()

Refreshes the UI component after a call of the beginUpdate() method.

Main article: beginUpdate()

See Also
jQuery
Angular
Vue
React

expandAll()

Expands all tasks.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandAll();
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";  

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandAll(); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandAll();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandAll();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAll();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAll();
        // ...
    }
</script>
See Also

expandAllToLevel(level)

Expands all tasks down to the specified hierarchical level.

Parameters:
level:

Number

The hierarchical level.

The expandAllToLevel method first collapses all expanded tasks and then expands them to the specified hierarchical level.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandAllToLevel(3);
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular"; 

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandAllToLevel(3); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandAllToLevel(3);
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandAllToLevel(3);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAllToLevel(3);
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandAllToLevel(3);
        // ...
    }
</script>
See Also

expandTask(key)

Expands a task.

Parameters:
key:

Object

The task key.

The expandTask method expands a task's parent tasks and the task itself.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandTask("task_key");
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandTask("task_key"); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandTask("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandTask("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandTask("task_key");
        // ...
    }
</script>
See Also

expandToTask(key)

Expands a task's parent tasks.

Parameters:
key:

Object

The task key.

The expandToTask method expands a task's parent tasks and does not expand the task itself.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.expandToTask("task_key");
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.expandToTask("task_key"); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.expandToTask("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.expandToTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandToTask("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.expandToTask("task_key");
        // ...
    }
</script>
See Also

focus()

Sets focus on the UI component.

See Also
jQuery
Angular
Vue
React

getDependencyData(key)

Gets the dependency data.

Parameters:
key:

Object

The dependency key.

Return Value:

Object

The dependency data.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getDependencyData("dependency_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getDependencyData("dependency_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getDependencyData("dependency_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getDependencyData("dependency_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getDependencyData("dependency_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getDependencyData("dependency_key");
        // ...
    }
</script>
See Also

getInstance(element)

Gets the instance of a UI component found using its DOM node.

Parameters:
element:

Element

|

jQuery

The UI component's container.

Return Value:

Object

The UI component's instance.

getInstance is a static method that the UI component class supports. The following code demonstrates how to get the Gantt instance found in an element with the myGantt ID:

// Modular approach
import Gantt from "devextreme/ui/gantt";
...
let element = document.getElementById("myGantt");
let instance = Gantt.getInstance(element) as Gantt;

// Non-modular approach
let element = document.getElementById("myGantt");
let instance = DevExpress.ui.dxGantt.getInstance(element);
See Also

getResourceAssignmentData(key)

Gets the resource assignment data.

Parameters:
key:

Object

The resource assignment key.

Return Value:

Object

The resource assignment data.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getResourceAssignmentData("res_assignment_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getResourceAssignmentData("res_assignment_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getResourceAssignmentData("res_assignment_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getResourceAssignmentData("res_assignment_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceAssignmentData("res_assignment_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceAssignmentData("res_assignment_key");
        // ...
    }
</script>
See Also

getResourceData(key)

Gets the resource data.

Parameters:
key:

Object

The resource key.

Return Value:

Object

The resource data.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getResourceData("resource_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getResourceData("resource_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getResourceData("resource_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getResourceData("resource_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceData("resource_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getResourceData("resource_key");
        // ...
    }
</script>
See Also

getTaskData(key)

Gets the task data.

Parameters:
key:

Object

The task key.

Return Value:

Object

The task data.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.getTaskData("task_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getTaskData("task_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getTaskData("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getTaskData("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskData("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskData("task_key");
        // ...
    }
</script>
See Also

getTaskResources(key)

Gets resources assigned to a task.

Parameters:
key:

Object

The task's key.

Return Value:

Array<Object>

The resources.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
gantt.getTaskResources("task_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getTaskResources("task_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getTaskResources("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getTaskResources("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskResources("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getTaskResources("task_key");
        // ...
    }
</script>
See Also

getVisibleDependencyKeys()

Gets the keys of the visible dependencies.

Return Value:

Array<Object>

The keys.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleDependencyKeys();
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleDependencyKeys();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleDependencyKeys();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleDependencyKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleDependencyKeys();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleDependencyKeys();
        // ...
    }
</script>
See Also

getVisibleResourceAssignmentKeys()

Gets the keys of the visible resource assignments.

Return Value:

Array<Object>

The keys.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleResourceAssignmentKeys();
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleResourceAssignmentKeys();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleResourceAssignmentKeys();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleResourceAssignmentKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceAssignmentKeys();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceAssignmentKeys();
        // ...
    }
</script>
See Also

getVisibleResourceKeys()

Gets the keys of the visible resources.

Return Value:

Array<Object>

The keys.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleResourceKeys();
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleResourceKeys();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleResourceKeys();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleResourceKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceKeys();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleResourceKeys();
        // ...
    }
</script>
See Also

getVisibleTaskKeys()

Gets the keys of the visible tasks.

Return Value:

Array<Object>

The keys.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.getVisibleTaskKeys();
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.getVisibleTaskKeys();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.getVisibleTaskKeys();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.getVisibleTaskKeys();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleTaskKeys();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.getVisibleTaskKeys();
        // ...
    }
</script>
See Also

insertDependency(data)

Inserts a new dependency.

Parameters:
data:

Object

The dependency data.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.insertDependency({ predecessorId: 1, successorId: 3, type: 3 });
        // ...
    }
</script>
See Also

insertResource(data, taskKeys)

Inserts a new resource.

Parameters:
data:

Object

The resource data.

taskKeys?:

Array<Object>

An array of task keys.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
// Inserts a new resource 
gantt.insertResource({ text: "New Resource" });

// Inserts a new resource and assigns it to an individual task
gantt.insertResource({ text: "New Resource" }, [6]);

// Inserts a new resource and assigns it to multiple tasks
gantt.insertResource({ text: "New Resource" }, [6,8]);
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        // Inserts a new resource 
        this.gantt.instance.insertResource({ text: "New Resource" });

        // Inserts a new resource and assigns it to an individual task
        this.gantt.instance.insertResource({ text: "New Resource" }, [6]);

        // Inserts a new resource and assigns it to multiple tasks
        this.gantt.instance.insertResource({ text: "New Resource" }, [6,8]);
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            // Inserts a new resource 
            this.gantt.insertResource({ text: "New Resource" });

            // Inserts a new resource and assigns it to an individual task
            this.gantt.insertResource({ text: "New Resource" }, [6]);

            // Inserts a new resource and assigns it to multiple tasks
            this.gantt.insertResource({ text: "New Resource" }, [6,8]);
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            // Inserts a new resource 
            this.gantt.insertResource({ text: "New Resource" });

            // Inserts a new resource and assigns it to an individual task
            this.gantt.insertResource({ text: "New Resource" }, [6]);

            // Inserts a new resource and assigns it to multiple tasks
            this.gantt.insertResource({ text: "New Resource" }, [6,8]);
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new resource 
        ganttInstance.insertResource({ text: "New Resource" });

        // Inserts a new resource and assigns it to an individual task
        ganttInstance.insertResource({ text: "New Resource" }, [6]);

        // Inserts a new resource and assigns it to multiple tasks
        ganttInstance.insertResource({ text: "New Resource" }, [6,8]);
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new resource 
        ganttInstance.insertResource({ text: "New Resource" });

        // Inserts a new resource and assigns it to an individual task
        ganttInstance.insertResource({ text: "New Resource" }, [6]);

        // Inserts a new resource and assigns it to multiple tasks
        ganttInstance.insertResource({ text: "New Resource" }, [6,8]);
    }
</script>
See Also

insertTask(data)

Inserts a new task.

Parameters:
data:

Object

The task data.

The insertTask method does not update the following data fields in the data source:

  • Key value fields.

  • Fields that are not assigned to the Gantt's columns.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
// Inserts a new task with the specified subject at the end of the other tasks.
gantt.insertTask({ title: "New Task" });

// Inserts a child task with the specified subject as a child of the task with ID = 2
gantt.insertTask({ title: "New Task" , parentId: 2});
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        // Inserts a new task with the specified subject at the end of the other tasks.
        this.gantt.instance.insertTask({ title: "New Task" });

        // Inserts a child task with the specified subject as a child of the task with ID = 2
        this.gantt.instance.insertTask({ title: "New Task" , parentId: 2});
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            // Inserts a new task with the specified subject at the end of the other tasks.
            this.gantt.insertTask({ title: "New Task" });

            // Inserts a child task with the specified subject as a child of the task with ID = 2
            this.gantt.insertTask({ title: "New Task" , parentId: 2});
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            // Inserts a new task with the specified subject at the end of the other tasks.
            this.gantt.insertTask({ title: "New Task" });

            // Inserts a child task with the specified subject as a child of the task with ID = 2
            this.gantt.insertTask({ title: "New Task" , parentId: 2});
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new task with the specified subject at the end of the other tasks.
        ganttInstance.insertTask({ title: "New Task" });

        // Inserts a child task with the specified subject as a child of the task with ID = 2
        ganttInstance.insertTask({ title: "New Task" , parentId: 2});
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        // Inserts a new task with the specified subject at the end of the other tasks.
        ganttInstance.insertTask({ title: "New Task" });

        // Inserts a child task with the specified subject as a child of the task with ID = 2
        ganttInstance.insertTask({ title: "New Task" , parentId: 2});
    }
</script>
See Also

instance()

Gets the UI component's instance. Use it to access other methods of the UI component.

Return Value:

Gantt

This UI component's instance.

See Also
jQuery
Angular
Vue
React

off(eventName)

Detaches all event handlers from a single event.

Parameters:
eventName:

String

The event's name.

Return Value:

Gantt

The object for which this method is called.

See Also
jQuery
Angular
Vue
React

off(eventName, eventHandler)

Detaches a particular event handler from a single event.

Parameters:
eventName:

String

The event's name.

eventHandler:

Function

The event's handler.

Return Value:

Gantt

The object for which this method is called.

See Also
jQuery
Angular
Vue
React

on(eventName, eventHandler)

Subscribes to an event.

Parameters:
eventName:

String

The event's name.

eventHandler:

Function

The event's handler.

Return Value:

Gantt

The object for which this method is called.

Use this method to subscribe to one of the events listed in the Events section.

See Also
jQuery
Angular
Vue
React

on(events)

Subscribes to events.

Parameters:
events:

Object

Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}

Return Value:

Gantt

The object for which this method is called.

Use this method to subscribe to several events with one method call. Available events are listed in the Events section.

See Also
jQuery
Angular
Vue
React

option()

Gets all UI component properties.

Return Value:

Object

The UI component's properties.

See Also
jQuery
Angular
Vue
React

option(optionName)

Gets the value of a single property.

Parameters:
optionName:

String

The property's name or full path.

Return Value: any

This property's value.

See Also
jQuery
Angular
Vue
React

option(optionName, optionValue)

Updates the value of a single property.

Parameters:
optionName:

String

The property's name or full path.

optionValue: any

This property's new value.

See Also
jQuery
Angular
Vue
React

option(options)

Updates the values of several properties.

Parameters:
options:

Object

Options with their new values.

See Also
jQuery
Angular
Vue
React

refresh()

Reloads data and repaints the Gantt component.

Return Value:

Promise<void> (jQuery or native)

A Promise that is resolved after data is loaded. It is a native Promise or a jQuery.Promise when you use jQuery.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
gantt.refresh();
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";  

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.refresh();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.refresh();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.refresh();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.refresh();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.refresh();
        // ...
    }
</script>

registerKeyHandler(key, handler)

Registers a handler to be executed when a user presses a specific key.

Parameters:
key:

String

A key.

handler:

Function

A handler. Accepts the keydown event as the argument. It is a EventObject or a jQuery.Event when you use jQuery.

The key argument accepts one of the following values:

  • "backspace"
  • "tab"
  • "enter"
  • "escape"
  • "pageUp"
  • "pageDown"
  • "end"
  • "home"
  • "leftArrow"
  • "upArrow"
  • "rightArrow"
  • "downArrow"
  • "del"
  • "space"
  • "F"
  • "A"
  • "asterisk"
  • "minus"

A custom handler for a key cancels the default handler for this key.

See Also
jQuery
Angular
Vue
React

repaint()

Repaints the UI component without reloading data. Call it to update the UI component's markup.

See Also
jQuery
Angular
Vue
React

resetOption(optionName)

Resets a property to its default value.

Parameters:
optionName:

String

A property's name.

See Also
jQuery
Angular
Vue
React

scrollToDate(date)

Scrolls the Gantt chart to the specified date.

Parameters:
date:

Date

|

Number

|

String

The date.

You can pass the date to the scrollToDate method in the following formats:

  • Date

    JavaScript
    var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate(new Date("December 17, 2020"));

  • Number - Specifies a date as a timestamp (total milliseconds since 1970/01/01).

    JavaScript
    var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate(1876800000000);

  • String - Specifies a date as a string value.

    JavaScript
    var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate("2020/01/01");

Note that the scrollToDate method scrolls to a date inside the current scroll area. You can zoom the chart to resize the viewport.

NOTE
Specify a timeout if you call the scrollToDate method in the contentReady event.
jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.scrollToDate(new Date("December 17, 2020"));
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.scrollToDate(new Date("December 17, 2020")); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.scrollToDate(new Date("December 17, 2020"));
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.scrollToDate(new Date("December 17, 2020"));
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.scrollToDate(new Date("December 17, 2020"));
        // ...
    }
</script>
See Also

showDependencies(value)

Shows or hides dependencies between tasks.

Parameters:
value:

Boolean

Specifies whether to show or hide dependencies.

DevExtreme Gantt Chart - Dependencies

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showDependencies(false);
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.showDependencies(false); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.showDependencies(false);
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.showDependencies(false);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showDependencies(false);
        ganttInstance.showDependencies(false);
        // ...
    }
</script>
See Also

showResourceManagerDialog()

Invokes the "Resource Manager" dialog.

DevExtreme Gantt - Invoke Resource Manager

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showResourceManagerDialog();
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from 'devextreme-angular';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})

export class AppComponent implements OnAfterViewInit {

    @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    showDialog() {
        this.gantt.instance.showResourceManagerDialog();
    }

    ngAfterViewInit () {
        this.showDialog();
    }
}
<dx-gantt ...>
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...>
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';

import DxGantt from 'devextreme-vue/gantt';

export default {
    components: {
        DxGantt
    },
    methods: {
        showDialog() {
            this.gantt.showResourceManagerDialog();
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';
import Gantt from 'devextreme-react/gantt';

const App = () => {
    const showDialog = () => {
        myGantt.current.instance.showResourceManagerDialog();
    }

    return (
        <Gantt ref={myGantt} />
    );
}

export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    // ...
)
<script>
    function showDialog() {
        gantt.showResourceManagerDialog();
    }
</script>
See Also

showResources(value)

Shows or hides task resources.

Parameters:
value:

Boolean

Specifies whether to show or hide task resources.

DevExtreme Gantt Chart - Resources

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showResources(false);
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.showResources(false); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.showResources(false);
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.showResources(false);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showResources(false);
        // ...
    }
</script>
See Also

showTaskDetailsDialog(taskKey)

Invokes the "Task Details" dialog.

Parameters:
taskKey:

Object

A task key.

DevExtreme Gantt Chart - Task Edit Dialog

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.showTaskDetailsDialog("task_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.showTaskDetailsDialog("task_key"); 
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.showTaskDetailsDialog("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.showTaskDetailsDialog("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showTaskDetailsDialog("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.showTaskDetailsDialog("task_key");
        // ...
    }
</script>
See Also

unassignAllResourcesFromTask(taskKey)

Removes all resources from the task.

Parameters:
taskKey:

Object

The task key.

DevExtreme Gantt Chart - Resources

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.unassignAllResourcesFromTask("task_key");
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.unassignAllResourcesFromTask("task_key");
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.unassignAllResourcesFromTask("task_key");
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.unassignAllResourcesFromTask("task_key");
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignAllResourcesFromTask("task_key");
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignAllResourcesFromTask("task_key");
        // ...
    }
</script>
See Also

unassignResourceFromTask(resourceKey, taskKey)

Removes a resource from the task.

Parameters:
resourceKey:

Object

The resource key.

taskKey:

Object

The task key.

DevExtreme Gantt Chart - Resources

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.unassignResourceFromTask(3, 10);
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.unassignResourceFromTask(3, 10);
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.unassignResourceFromTask(3, 10);
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.unassignResourceFromTask(3, 10);
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignResourceFromTask(3, 10);
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.unassignResourceFromTask(3, 10);
        // ...
    }
</script>
See Also

updateDimensions()

Updates the dimensions of the UI component contents.

See Also
jQuery
Angular
Vue
React

updateTask(key, data)

Updates the task data.

Parameters:
key:

Object

The task key.

data:

Object

The task data.

Note that the updateTask method does not allow you to change a task's parent task.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
gantt.updateTask(3, {title: "New Title"});
Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})    

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.updateTask(3, {title: "New Title"});
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxGanttModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxGanttModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.updateTask(3, {title: "New Title"});
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.updateTask(3, {title: "New Title"});
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.updateTask(3, {title: "New Title"});
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.updateTask(3, {title: "New Title"});
        // ...
    }
</script>
See Also

zoomIn()

Zooms in the Gantt chart.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.zoomIn();
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.zoomIn();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.zoomIn();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.zoomIn();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.zoomIn();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.zoomIn();
        // ...
    }
</script>
See Also

zoomOut()

Zooms out the Gantt chart.

jQuery
index.js
var gantt = $("#ganttContainer").dxGantt("instance");
//...
var keys = gantt.zoomOut();
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxGanttComponent } from "devextreme-angular";

export class AppComponent {
    @ViewChild(DxGanttComponent, { static: false }) gantt: DxGanttComponent;
    // Prior to Angular 8
    // @ViewChild(DxGanttComponent) gantt: DxGanttComponent;

    yourCustomMethod() {
        this.gantt.instance.zoomOut();
        // ...
    }
}
<dx-gantt ... >
</dx-gantt>
Vue
App.vue
<template>
    <DxGantt ...
        :ref="ganttRef">
    </DxGantt>
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import 'devexpress-gantt/dist/dx-gantt.css';

import DxGantt from 'devextreme-vue/gantt';

const ganttRef = 'gantt';

export default {
    components: {
        DxGantt
    },
    data() {
        return {
            ganttRef
        }
    },
    computed: {
        gantt: function() {
            return this.$refs[ganttRef].instance;
        }
    },
    methods: {
        yourCustomMethod(){
            this.gantt.zoomOut();
            // ...
        }
    }
}
</script>
React
App.js
import React from 'react';

import 'devextreme/dist/css/dx.light.css';

import Gantt from 'devextreme-react/gantt';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.ganttRef = React.createRef();

        this.yourCustomMethod = () => {
            this.gantt.zoomOut();
            // ...
        }
    }

    get gantt() {
        return this.ganttRef.current.instance;
    }

    render() {
        return (
            <Gantt ...
                ref={this.ganttRef}>
            </Gantt>
        );
    }
}
export default App;
ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.zoomOut();
        // ...
    }
</script>
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().Gantt()
    .ID("gantt")
    @* ... *@
)

<script type="text/javascript">
    function getGanttInstance() {
        return $("#gantt").dxGantt("instance");
    }
    function yourCustomMethod() {
        var ganttInstance = getGanttInstance();
        ganttInstance.zoomOut();
        // ...
    }
</script>
See Also