Name	Type	Description
device	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.

Name

Type

Description

device

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 Lookup UI component in an application executed on the desktop.

jQuery

JavaScript

DevExpress.ui.dxLookup.defaultOptions({ 
    device: { deviceType: "desktop" },
    options: {
        // Here go the Lookup properties
    }
});

Angular

TypeScript

import Lookup, { Properties } from "devextreme/ui/lookup";
// ...
export class AppComponent {
    constructor () {
        Lookup.defaultOptions<Properties>({
            device: { deviceType: "desktop" },
            options: {
                // Here go the Lookup properties
            }
        });
    }
}

Vue

<template>
    <div>
        <DxLookup id="lookup1" />
        <DxLookup id="lookup2" />
    </div>
</template>
<script>
import DxLookup from "devextreme-vue/lookup";
import Lookup from "devextreme/ui/lookup";

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

export default {
    components: {
        DxLookup
    }
}
</script>

React

import dxLookup from "devextreme/ui/lookup";
import Lookup from "devextreme-react/lookup";

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

export default function App() {
    return (
        <div>
            <Lookup id="lookup1" />
            <Lookup id="lookup2" />
        </div>
    )
}

You can also set rules for multiple device types:

jQuery

JavaScript

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    DevExpress.ui.dxLookup.defaultOptions({ 
        device: deviceConfig,
        options: {
            // Here go the Lookup properties
        }
    });
});

Angular

TypeScript

import Lookup, { Properties } from "devextreme/ui/lookup";
// ...
export class AppComponent {
    constructor () {
        const devicesConfig = [
            { deviceType: 'desktop' },
            { deviceType: 'tablet' },
            { deviceType: 'phone' },
        ];

        devicesConfig.forEach(deviceConfig => {
            Lookup.defaultOptions<Properties>({
                device: deviceConfig,
                options: {
                    // Here go the Lookup properties
                }
            });
        });
    }
}

Vue

<template>
    <div>
        <DxLookup />
    </div>
</template>
<script>
import DxLookup from "devextreme-vue/lookup";
import Lookup from "devextreme/ui/lookup";

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    Lookup.defaultOptions({
        device: deviceConfig,
        options: {
            // Here go the Lookup properties
        }
    });
});

export default {
    components: {
        DxLookup
    }
}
</script>

React

import dxLookup from "devextreme/ui/lookup";
import Lookup from "devextreme-react/lookup";

const devicesConfig = [
    { deviceType: 'desktop' },
    { deviceType: 'tablet' },
    { deviceType: 'phone' },
];

devicesConfig.forEach(deviceConfig => {
    dxLookup.defaultOptions({
        device: deviceConfig,
        options: {
            // Here go the Lookup properties
        }
    });
});

export default function App() {
    return (
        <div>
            <Lookup />
        </div>
    )
}

dispose()

Disposes of all the resources allocated to the Lookup instance.

jQuery

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

JavaScript

$("#myLookup").dxLookup("dispose");
$("#myLookup").remove();

Angular

Use conditional rendering instead of this method:

app.component.html

<dx-lookup ...
    *ngIf="condition">
</dx-lookup>

Vue

Use conditional rendering instead of this method:

App.vue

<template>
    <DxLookup ...
        v-if="condition">
    </DxLookup>
</template>

<script>
import DxLookup from 'devextreme-vue/lookup';

export default {
    components: {
        DxLookup
    }
}
</script>

React

Use conditional rendering instead of this method:

App.js

import React from 'react';

import Lookup from 'devextreme-react/lookup';

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

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

class App extends React.Component {
    render() {
        return (
            <DxLookup 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.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

endUpdate()

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

The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

field()

Gets the UI component's <input> element.

Return Value:

HTMLElement | jQuery

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

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

focus()

Sets focus to the input element representing the UI component.

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

getDataSource()

Gets the DataSource instance.

Return Value:

DataSource

The DataSource instance.

NOTE

This method returns the DataSource instance even if the UI component's dataSource property was given a simple array.

View on GitHub

jQuery

Call Methods

Angular

Call Methods

Vue

Call Methods

React

Call Methods

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 Lookup instance found in an element with the myLookup ID:

// Modular approach
import Lookup from "devextreme/ui/lookup";
...
let element = document.getElementById("myLookup");
let instance = Lookup.getInstance(element) as Lookup;

// Non-modular approach
let element = document.getElementById("myLookup");
let instance = DevExpress.ui.dxLookup.getInstance(element);