JavaScript/jQuery Calendar Options

An object defining configuration properties for the Calendar UI component.

accessKey

Specifies the shortcut key that sets focus on the UI component.

Type:

String

Default Value: undefined

The value of this property will be passed to the accesskey attribute of the HTML element that underlies the UI component.

activeStateEnabled

Specifies whether the UI component changes its visual state as a result of user interaction.

Type:

Boolean

Default Value: true

The UI component switches to the active state when users press down the primary mouse button. When this property is set to true, the CSS rules for the active state apply. You can change these rules to customize the component.

Use this property when you display the component on a platform whose guidelines include the active state change for UI components.

cellTemplate

Specifies a custom template for calendar cells.

Type:

template

Template Data:
Name Type Description
date

Date

A Date object associated with the cell.

text

String

The cell's text.

view

String

The current view's name.

Default Name: 'cell'

View Demo

If a cell is a week number, the date field value is undefined.

See Also

dateSerializationFormat

Specifies the date-time value serialization format.

Type:

String

Default Value: undefined

Date-time serialization involves date-time value conversion into a string format for storage or transmission. To ensure proper format detection, specify this property.

Use LDML patterns to pass custom format strings to this property.

IMPORTANT
dateSerializationFormat does not support all LDML pattern combinations.

For instance, you can specify the following patterns:

  • "yyyy-MM-dd"
    A date.

  • "yyyy-MM-ddTHH:mm:ss"
    Local date and time.

  • "yyyy-MM-ddTHH:mm:ssZ"
    Date and time in UTC.

  • "yyyy-MM-ddTHH:mm:ssx", "yyyy-MM-ddTHH:mm:ssxx", "yyyy-MM-ddTHH:mm:ssxxx"
    Date and time with a timezone.

NOTE
  • You can use this property only if you do not specify the initial value. dateSerializationFormat is calculated automatically if you pass a value in the initial configuration.

  • If you specify this property, the value will be a string, not a Date object.

  • If you use API to change the value, make sure that the value has the same format that you specified in this property.

  • This property takes effect only if the forceIsoDateParsing field is set to true in the global configuration object.

See Also

disabled

Specifies whether the UI component responds to user interaction.

Type:

Boolean

Default Value: false

disabledDates

Specifies dates that users cannot select.

Type:

Array<Date>

|

Function

Function parameters:
data: DisabledDate

Information about the checked date.

Return Value:

Boolean

true if the date should be disabled; otherwise false.

Default Value: null

This property accepts an array of dates:

jQuery
index.js
$(function() {
    $("#calendarContainer").dxCalendar({
        // ...
        disabledDates: [ 
            new Date("07/1/2017"),  
            new Date("07/2/2017"), 
            new Date("07/3/2017") 
        ]
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-calendar ...
    [disabledDates]="disabledDates">
</dx-calendar>
import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    disabledDates: Date[] = [ 
        new Date("07/1/2017"),  
        new Date("07/2/2017"), 
        new Date("07/3/2017") 
    ];
}
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxCalendarModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxCalendarModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxCalendar ...
        :disabled-dates="disabledDates"
    />
</template>

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

import DxCalendar from 'devextreme-vue/calendar';

export default {
    components: {
        DxCalendar
    },
    data() {
        return {
            disabledDates: [ 
                new Date("07/1/2017"),  
                new Date("07/2/2017"), 
                new Date("07/3/2017") 
            ]
        }
    }
}
</script>
React
App.js
import React from 'react';

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

import Calendar from 'devextreme-react/calendar';

class App extends React.Component {
    constructor() {
        this.disabledDates = [ 
            new Date("07/1/2017"),  
            new Date("07/2/2017"), 
            new Date("07/3/2017") 
        ];
    }
    render() {
        return (
            <Calendar ...
                disabledDates={this.disabledDates} 
            />
        );
    }
}
export default App;

View Demo

Alternatively, pass a function to disabledDates. This function should define the rules that determine whether the checked date is disabled. A separate set of rules should target every view individually.

jQuery
index.js
$(function() {
    $("#calendarContainer").dxCalendar({
        // ...
        disabledDates: function(args) {
            const dayOfWeek = args.date.getDay();
            const month = args.date.getMonth();
            const isWeekend = args.view === "month" && (dayOfWeek === 0 || dayOfWeek === 6 );
            const isMarch = (args.view === "year" || args.view === "month") && month === 2;

            return isWeekend || isMarch;
        }
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-calendar ...
    [disabledDates]="disableDates">
</dx-calendar>
import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    disableDates(args) {
        const dayOfWeek = args.date.getDay();
        const month = args.date.getMonth();
        const isWeekend = args.view === "month" && (dayOfWeek === 0 || dayOfWeek === 6 );
        const isMarch = (args.view === "year" || args.view === "month") && month === 2;

        return isWeekend || isMarch;
    }
}
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxCalendarModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxCalendarModule
    ],
    providers: [ ],
    bootstrap: [AppComponent]
})
export class AppModule { }
Vue
App.vue
<template>
    <DxCalendar ...
        :disabled-dates="disableDates"
    />
</template>

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

import DxCalendar from 'devextreme-vue/calendar';

export default {
    components: {
        DxCalendar
    },
    methods: {
        disableDates(args) {
            const dayOfWeek = args.date.getDay();
            const month = args.date.getMonth();
            const isWeekend = args.view === "month" && (dayOfWeek === 0 || dayOfWeek === 6 );
            const isMarch = (args.view === "year" || args.view === "month") && month === 2;

            return isWeekend || isMarch;
        }
    }
}
</script>
React
App.js
import React from 'react';

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

import Calendar from 'devextreme-react/calendar';

class App extends React.Component {
    disableDates(args) {
        const dayOfWeek = args.date.getDay();
        const month = args.date.getMonth();
        const isWeekend = args.view === "month" && (dayOfWeek === 0 || dayOfWeek === 6 );
        const isMarch = (args.view === "year" || args.view === "month") && month === 2;

        return isWeekend || isMarch;
    }
    render() {
        return (
            <Calendar ...
                disabledDates={this.disableDates} 
            />
        );
    }
}
export default App;

View Demo

In cases of 'multiple' and 'range' selection modes, the behavior of disabled dates in Calendar is the following:

  • If you specify the value property programmatically, disabled dates are selected in the values array.

  • If you use UI to change selection (clicks on dates or weeks, the Enter key), you cannot select disabled dates in 'multiple' mode. In 'range' mode, disabled dates cannot start or end a range, but can be included in the middle.

See Also

elementAttr

Specifies the global attributes to be attached to the UI component's container element.

Type:

Object

Default Value: {}

jQuery
$(function(){
    $("#calendarContainer").dxCalendar({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});
Angular
HTML
TypeScript
<dx-calendar ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-calendar>
import { DxCalendarModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxCalendarModule
    ],
    // ...
})
Vue
App.vue
<template>
    <DxCalendar ...
        :element-attr="calendarAttributes">
    </DxCalendar>
</template>

<script>
import DxCalendar from 'devextreme-vue/calendar';

export default {
    components: {
        DxCalendar
    },
    data() {
        return {
            calendarAttributes: {
                id: 'elementId',
                class: 'class-name'
            }
        }
    }
}
</script>
React
App.js
import React from 'react';

import Calendar from 'devextreme-react/calendar';

class App extends React.Component {
    calendarAttributes = {
        id: 'elementId',
        class: 'class-name'
    }

    render() {
        return (
            <Calendar ...
                elementAttr={this.calendarAttributes}>
            </Calendar>
        );
    }
}
export default App;

firstDayOfWeek

Specifies the first day of a week.

Default Value: undefined

The property can take on a value from 0 to 6.

  • 0 - Sunday
  • 1 - Monday
  • 2 - Tuesday
  • 3 - Wednesday
  • 4 - Thursday
  • 5 - Friday
  • 6 - Saturday

By default, the value provided by the culture settings is used.

focusStateEnabled

Specifies whether the UI component can be focused using keyboard navigation.

Type:

Boolean

Default Value: true (desktop)

height

Specifies the UI component's height.

Type:

Number

|

String

|

Function

Return Value:

Number

|

String

The UI component's height.

Default Value: undefined

This property accepts a value of one of the following types:

  • Number
    The height in pixels.

  • String
    A CSS-accepted measurement of height. For example, "55px", "20vh", "80%", "inherit".

  • Function (deprecated since v21.2)
    Refer to the W0017 warning description for information on how you can migrate to viewport units.

hint

Specifies text for a hint that appears when a user pauses on the UI component.

Type:

String

Default Value: undefined

hoverStateEnabled

Specifies whether the UI component changes its state when a user pauses on it.

Type:

Boolean

Default Value: true

isDirty

Specifies whether the component's current value differs from the initial value.

Type:

Boolean

Default Value: false

This property is a read-only flag. You can use it to check if the editor value changed.

jQuery
index.js
$(() => {
    const calendar = $('#calendar').dxCalendar({
        // ...
    }).dxCalendar('instance');

    $('#button').dxButton({
        // ...
        onClick () {
            if (calendar.option('isDirty')) {
                DevExpress.ui.notify("Do not forget to save changes", "warning", 500);
            }
        }
    });
});
Angular
app.component.ts
app.component.html
import { Component, ViewChild } from '@angular/core';
import { DxCalendarComponent, DxButtonModule } from 'devextreme-angular';
import notify from 'devextreme/ui/notify';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    @ViewChild('calendarRef', { static: false }) calendar: DxCalendarComponent;

    onClick () {
        if (this.calendar.instance.option('isDirty')) {
            notify("Do not forget to save changes", "warning", 500);
        }
    }
}
<dx-calendar ... 
    #calendarRef
>
</dx-calendar>
<dx-button ...
    (onClick)="onClick($event)"
>
</dx-button>
Vue
App.vue
<template>
    <DxCalendar ...
        :ref="calendarRef"
    >
    </DxCalendar>
    <DxButton ...
        @click="onClick"
    />
</template>

<script>
import 'devextreme/dist/css/dx.light.css';
import DxCalendar from 'devextreme-vue/calendar';
import DxButton from 'devextreme-vue/button';
import notify from 'devextreme/ui/notify';

export default {
    components: {
        DxCalendar,
        DxButton
    },

    data() {
        return {
            calendarRef
        }
    },

    methods: {
        onClick () {
            if (this.calendar.option('isDirty')) {
                notify("Do not forget to save changes", "warning", 500);
            }
        }
    },

    computed: {
        calendar: function() {
            return this.$refs[calendarRef].instance;
        }
    }
}
</script>
React
App.js
import React, { useRef } from 'react';
import Calendar from 'devextreme-react/calendar';
import Button from 'devextreme-react/button';
import 'devextreme/dist/css/dx.light.css';

const App = () => {
    const calendarRef = useRef(null);

    const onClick = () => {
        if (this.calendarRef.current.instance.option('isDirty')) {
            notify("Do not forget to save changes", "warning", 500);
        }
    };

    return (
        <Calendar ...
            ref={calendarRef}
        >
        </Calendar>
        <Button ...
            onClick={onClick}
        />
    );
};

export default App;
See Also

isValid

Specifies or indicates whether the editor's value is valid.

Type:

Boolean

Default Value: true

NOTE
When you use async rules, isValid is true if the status is "pending" or "valid".
See Also

max

The latest date the UI component allows to select.

Type:

Date

|

Number

|

String

Default Value: new Date(3000, 0)

maxZoomLevel

Specifies the maximum zoom level of the calendar.

Default Value: 'month'

min

The earliest date the UI component allows to select.

Type:

Date

|

Number

|

String

Default Value: new Date(1000, 0)

minZoomLevel

Specifies the minimum zoom level of the calendar.

Default Value: 'century'

name

The value to be assigned to the name attribute of the underlying HTML element.

Type:

String

Default Value: ''

Specify this property if the UI component lies within an HTML form that will be submitted.

onDisposing

A function that is executed before the UI component is disposed of.

Type:

Function

Function parameters:

Information about the event.

Object structure:
Name Type Description
element

HTMLElement | jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

Calendar

The UI component's instance.

Default Value: null

onInitialized

A function used in JavaScript frameworks to save the UI component instance.

Type:

Function

Function parameters:

Information about the event.

Object structure:
Name Type Description
element

HTMLElement | jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

Calendar

The UI component's instance.

Default Value: null

Angular
app.component.html
app.component.ts
<dx-calendar ...
    (onInitialized)="saveInstance($event)">
</dx-calendar>
import { Component } from "@angular/core";
import Calendar from "devextreme/ui/data_grid";
// ...
export class AppComponent {
    calendarInstance: Calendar;
    saveInstance (e) {
        this.calendarInstance = e.component;
    }
}
Vue
App.vue (Options API)
App.vue (Composition API)
<template>
    <div>
        <DxCalendar ...
            @initialized="saveInstance">
        </DxCalendar>
    </div>
</template>

<script>
import DxCalendar from 'devextreme-vue/calendar';

export default {
    components: {
        DxCalendar
    },
    data: function() {
        return {
            calendarInstance: null
        };
    },
    methods: {
        saveInstance: function(e) {
            this.calendarInstance = e.component;
        }
    }
};
</script>
<template>
    <div>
        <DxCalendar ...
            @initialized="saveInstance">
        </DxCalendar>
    </div>
</template>

<script setup>
import DxCalendar from 'devextreme-vue/calendar';

let calendarInstance = null;

const saveInstance = (e) => {
    calendarInstance = e.component;
}
</script>
React
App.js
import Calendar from 'devextreme-react/calendar';

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

        this.saveInstance = this.saveInstance.bind(this);
    }

    saveInstance(e) {
        this.calendarInstance = e.component;
    }

    render() {
        return (
            <div>
                <Calendar onInitialized={this.saveInstance} />
            </div>
        );
    }
}
See Also
jQuery
  • Get a UI component Instance in jQuery
Angular
  • Get a UI component Instance in Angular
Vue
  • Get a UI component Instance in Vue
React
  • Get a UI component Instance in React

onOptionChanged

A function that is executed after a UI component property is changed.

Type:

Function

Function parameters:

Information about the event.

Object structure:
Name Type Description
value any

The modified property's new value.

previousValue any

The UI component's previous value.

name

String

The modified property if it belongs to the first level. Otherwise, the first-level property it is nested into.

fullName

String

The path to the modified property that includes all parent properties.

element

HTMLElement | jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

Calendar

The UI component's instance.

Default Value: null

The following example shows how to subscribe to component property changes:

jQuery
index.js
$(function() {
    $("#calendarContainer").dxCalendar({
        // ...
        onOptionChanged: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-calendar ...
    (onOptionChanged)="handlePropertyChange($event)"> 
</dx-calendar>
import { Component } from '@angular/core'; 

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

export class AppComponent { 
    // ...
    handlePropertyChange(e) {
        if(e.name === "changedProperty") { 
            // handle the property change here
        }
    }
}
import { BrowserModule } from '@angular/platform-browser'; 
import { NgModule } from '@angular/core'; 
import { AppComponent } from './app.component'; 
import { DxCalendarModule } from 'devextreme-angular'; 

@NgModule({ 
    declarations: [ 
        AppComponent 
    ], 
    imports: [ 
        BrowserModule, 
        DxCalendarModule 
    ], 
    providers: [ ], 
    bootstrap: [AppComponent] 
}) 

export class AppModule { }  
Vue
App.vue
<template> 
    <DxCalendar ...
        @option-changed="handlePropertyChange"
    />            
</template> 

<script>  
import 'devextreme/dist/css/dx.light.css'; 
import DxCalendar from 'devextreme-vue/calendar'; 

export default { 
    components: { 
        DxCalendar
    }, 
    // ...
    methods: { 
        handlePropertyChange: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    } 
} 
</script> 
React
App.js
import React from 'react';  
import 'devextreme/dist/css/dx.light.css'; 

import Calendar from 'devextreme-react/calendar'; 

const handlePropertyChange = (e) => {
    if(e.name === "changedProperty") {
        // handle the property change here
    }
}

export default function App() { 
    return ( 
        <Calendar ...
            onOptionChanged={handlePropertyChange}
        />        
    ); 
} 

onValueChanged

A function that is executed after the UI component's value is changed.

Type:

Function

Function parameters:

Information about the event.

Object structure:
Name Type Description
value

Object

The UI component's new value.

previousValue

Object

The UI component's previous value.

event

Event (jQuery or EventObject)

The event that caused the function to execute. It is an EventObject or a jQuery.Event when you use jQuery. This field is undefined if the value is changed programmatically.

element

HTMLElement | jQuery

The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.

component

Calendar

The UI component's instance.

Default Value: null

readOnly

Specifies whether the editor is read-only.

Type:

Boolean

Default Value: false

rtlEnabled

Switches the UI component to a right-to-left representation.

Type:

Boolean

Default Value: false

When this property is set to true, the UI component text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

JavaScript
DevExpress.config({
    rtlEnabled: true
});

DataGrid Demo Navigation UI Demo Editors Demo

selectionMode

Specifies one of three selection modes: single, multiple, or range.

Default Value: 'single'

The selected value or values are stored in the value property. The following selection modes are available:

  • 'single'
    A user can select only one date at a time.

  • 'multiple'
    A user can select multiple dates at a time.

  • 'range'
    A user can select a range of dates. The first and the last date in the range are stored in the value property.

View Demo

selectWeekOnClick

Specifies whether a user can select a week by clicking on a week number.

Type:

Boolean

Default Value: true

This property is in effect if showWeekNumbers is enabled and selectionMode is 'multiple' or 'range'.

View Demo

showTodayButton

Specifies whether or not the UI component displays a button that selects the current date.

Type:

Boolean

Default Value: false

showWeekNumbers

Specifies whether to display a column with week numbers.

Type:

Boolean

Default Value: false

See Also

tabIndex

Specifies the number of the element when the Tab key is used for navigating.

Type:

Number

Default Value: 0

The value of this property will be passed to the tabindex attribute of the HTML element that underlies the UI component.

validationError

Information on the broken validation rule. Contains the first item from the validationErrors array.

Type: any
Default Value: null

See Also

validationErrors

An array of the validation rules that failed.

Type:

Array<any>

Default Value: null

validationMessageMode

Specifies how the message about the validation rules that are not satisfied by this editor's value is displayed.

Default Value: 'auto'

The following property values are possible:

  • auto
    The tooltip with the message is displayed when the editor is in focus.
  • always
    The tooltip with the message is not hidden when the editor loses focus.

validationMessagePosition

Specifies the position of a validation message relative to the component. The validation message describes the validation rules that this component's value does not satisfy.

Type:

Position

Default Value: 'bottom'

The following example positions a validation message at the component's right:

jQuery
index.js
$(function() {
    $("#calendarContainer").dxCalendar({
        // ...
        validationMessagePosition: 'right'
    }).dxValidator({
        validationRules: [{
            type: 'required',
            message: 'Required',
        }],
    });
});
Angular
app.component.html
<dx-calendar ...
    validationMessagePosition="right">
    <dx-validator>
        <dxi-validation-rule
            type="required"
            message="Required"
        >
        </dxi-validation-rule>
    </dx-validator>
</dx-calendar>
Vue
App.vue
<template>
    <DxCalendar ...
        validation-message-position="right"
    >
        <DxValidator>
            <DxRequiredRule message="Required" />
        </DxValidator>
    </DxCalendar>
</template>

<script>
    // ...
</script>
React
App.js
import React from 'react';
// ...

function App() {
    return (
        <Calendar ...
            validationMessagePosition="right"
        >
            <Validator>
                <RequiredRule message="Required" />
            </Validator>
        </Calendar>
    ); 

};
export default App;

validationStatus

Indicates or specifies the current validation status.

Default Value: 'valid'

The following table illustrates the validation status indicators:

validationStatus Indicator
"pending" DevExtreme editor validation status: pending
"valid" DevExtreme editor validation status: valid
"invalid" DevExtreme editor validation status: invalid

When you assign "invalid" to validationStatus, you can also use the validationErrors array to set an error message as shown below:

jQuery
index.js
$(function() {
    const calendar = $("#calendarContainer").dxCalendar({
        // ...
    }).dxCalendar("instance");

    function setInvalidStatus(message) {
        calendar.option({
            validationStatus: "invalid",
            validationErrors: [{ message: message }]
        });
    }
});
Angular
app.component.html
app.component.ts
<dx-calendar
    [validationStatus]="validationStatus"
    [validationErrors]="validationErrors">
</dx-calendar>
// ...
export class AppComponent {
    validationStatus: string = "valid";
    validationErrors: any;
    // ...
    setInvalidStatus(message) {
        this.validationStatus = "invalid";
        this.validationErrors = [{ message: message }];
    }
}
Vue
App.vue
<template>
    <DxCalendar ...
        :validation-status="validationStatus"
        :validation-errors="validationErrors"
    />
</template>

<script>
    // ...
    export default {
        // ...
        data() {
            return {
                validationStatus: "valid",
                validationErrors: []
            }
        },
        methods: {
            setInvalidStatus(message) {
                this.validationStatus = "invalid";
                this.validationErrors = [{ message: message }];
            }
        }
    }
</script>
React
App.js
import React, { useState } from 'react';
// ...

function App() {
    const [validationStatus, setValidationStatus] = useState("valid");
    const [validationErrors, setValidationErrors] = useState([]);

    const setInvalidStatus = message => {
        setValidationStatus("invalid");
        setValidationErrors([{ message: message }]);
    }

    return (
        <Calendar
            validationStatus={validationStatus}
            validationErrors={validationErrors}
        />
    ); 

};
export default App;

value

An object or a value that specifies the date and time selected in the calendar.

Type:

Date

|

Number

|

String

|

Array<Date | Number | String>

Default Value: null
Raised Events: onValueChanged

You can use the following date formats:

  • Date
    Specifies the date directly.

  • Number
    Specifies the date with a timestamp (total milliseconds since 1970/01/01).

  • String
    Specifies the date with a string value. The UI component supports the following formats of a date string:

    • "yyyy-MM-dd" (for example, "2017-03-06")
    • "yyyy-MM-ddTHH:mm:ss" (for example, "2017-03-27T16:54:48")
    • "yyyy-MM-ddTHH:mm:ssZ" (for example, "2017-03-27T13:55:41Z")
    • "yyyy-MM-ddTHH:mm:ssx" (for example, "2017-03-27T16:54:10+03")
  • Array of the formats mentioned before
    Available only for 'multiple' and 'range' selection modes. The array includes all selected dates.

If the UI component value is changed by a user, the new value is saved in the same format as the initial value.

View Demo

visible

Specifies whether the UI component is visible.

Type:

Boolean

Default Value: true

weekNumberRule

Specifies a week number calculation rule.

Default Value: 'auto'

View Demo

This property can take on one of the following values:

  • firstDay
    The first week of a year is the week that contains January 1.

  • firstFourDays
    The first week of a year is the week that starts on one of the first four weekdays: Monday, Tuesday, Wednesday, or Thursday. This rule is defined by the ISO 8601 standard. If the first week of the year begins on a Friday, Saturday, or Sunday, this week is considered the last week of the previous year.

  • fullWeek
    The first week of a year is the week that begins with a day that matches the firstDayOfWeek option value.

  • auto (default)
    The week calculation rule depends on the locale. If a week starts on Monday, the firstFourDays rule is applied. Otherwise, the firstDay rule is in effect.

If you want to implement your own week number calculation rule, use the cellTemplate function:

jQuery
index.js
$(function() {
    let lastDateOfWeek;

    function getWeekNumber(date, firstDayOfWeek) {
        // Implement your own week calculation logic
    }

    function getCellTemplate(data) {
        if (data.view === 'month') {
            if (!data.date) {
                cssClass = 'week-number';
                data.text = getWeekNumber(lastDateOfWeek, 0).toString();
            } 
            else {
                lastDateOfWeek = data.date;
            }
        }
        return `<span>${data.text}</span>`;
    }

    $('#calendar-container').dxCalendar({
        value: new Date(2000, 0, 1),
        showWeekNumbers: true,
        cellTemplate: getCellTemplate
    });
});
Angular
app.component.html
app.component.ts
<dx-calendar
    [value]="currentValue"
    [showWeekNumbers]="true"
    (cellTemplate)="custom"
>
    <span
        *dxTemplate="let cell of 'custom'"
        [ngClass]="getCellCssClass(cell)"
    >
        {{ cell.text }}
    </span>
</dx-calendar>
// ...
export class AppComponent {
    lastDateOfWeek: Number;
    currentValue: Date = new Date(2000, 0, 1);

    getWeekNumber(date, firstDayOfWeek) {
        // Implement your own week calculation logic
    }

    getCellCssClass({ date, view, text }) {
        let cssClass = '';
        if (view === 'month') {
            if (!date) {
                cssClass = 'week-number';
                text = getWeekNumber(this.lastDateOfWeek, 0).toString();
            } 
            else {
                this.lastDateOfWeek = date;
            }
        }
        return cssClass;
    }
}
Vue
App.vue
<template>
    <DxCalendar
        :value="currentValue"
        :show-week-numbers="true"
        cell-template="custom"
    >
        <template #custom="{ data: cell }">
            <span :class="getCellCssClass(cell)">
                {{ cell.text }}
            </span>
        </template>
    </DxCalendar>
</template>

<script>
// ...
function getWeekNumber(date, firstDayOfWeek) {
    // Implement your own week calculation logic
}

export default {
    // ...
    data() {
        return {
            currentValue: new Date(2000, 0, 1),
            lastDateOfWeek: 0
        }
    }
    methods: {
        getCellCssClass({ date, view, text }) {
            let cssClass = '';
            if (view === 'month') {
                if (!date) {
                    cssClass = 'week-number';
                    text = getWeekNumber(this.lastDateOfWeek, 0).toString();
                } 
                else {
                    this.lastDateOfWeek = date;
                }
            }
            return cssClass;
        }
    }
}
</script>
React
App.js
// ...
let lastDateOfWeek;
const currentValue = new Date(2000, 0, 1);

const getWeekNumber(date, firstDayOfWeek) {
        // Implement your own week calculation logic
    }

const getCellCssClass({ date, view, text }) {
    let cssClass = '';
    if (view === 'month') {
        if (!date) {
            cssClass = 'week-number';
            text = getWeekNumber(lastDateOfWeek, 0).toString();
        } 
        else {
            lastDateOfWeek = date;
        }
    }
    return cssClass;
}

const customCell = (cell) => {
    const { text, } = cell;
    const className = getCellCssClass(cell);
    return (
        <span className={className}>
            { text }
        </span>
    );
}

function App() {
    return (
        <Calendar
            value={currentValue}
            showWeekNumbers={true}
            cellRender={customCell}
        >
        </Calendar>
    );
};

export default App;

width

Specifies the UI component's width.

Type:

Number

|

String

|

Function

Return Value:

Number

|

String

The UI component's width.

Default Value: undefined

This property accepts a value of one of the following types:

  • Number
    The width in pixels.

  • String
    A CSS-accepted measurement of width. For example, "55px", "20vw", "80%", "auto", "inherit".

  • Function (deprecated since v21.2)
    Refer to the W0017 warning description for information on how you can migrate to viewport units.

zoomLevel

Specifies the current calendar zoom level.

Default Value: 'month'
Raised Events: onOptionChanged

Zoom level determines the size of a date range displayed on a single calendar page.

View Demo