Angular CheckBox Properties

Default Value: true

This property is used when the UI component is displayed on a platform whose guidelines include the active state change for UI components.

disabled

Specifies whether the UI component responds to user interaction.

Type:

Default Value: false

elementAttr

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

Type:

Default Value: {}

jQuery

$(function(){
    $("#checkBoxContainer").dxCheckBox({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});

Angular

HTML

TypeScript

<dx-check-box ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-check-box>

import { DxCheckBoxModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxCheckBoxModule
    ],
    // ...
})

Vue

App.vue

<template>
    <DxCheckBox ...
        :element-attr="checkBoxAttributes">
    </DxCheckBox>
</template>

<script>
import DxCheckBox from 'devextreme-vue/check-box';

export default {
    components: {
        DxCheckBox
    },
    data() {
        return {
            checkBoxAttributes: {
                id: 'elementId',
                class: 'class-name'
            }
        }
    }
}
</script>

React

App.js

import React from 'react';

import CheckBox from 'devextreme-react/check-box';

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

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

focusStateEnabled

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

Type:

Default Value: true (desktop)

height

Specifies the UI component's height.

Type:

|

|

Return Value:

|

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", "80%", "inherit".
Function
A function returning either of the above. For example:
JavaScript
```
height: function() {
    return window.innerHeight / 1.5;
}
```

NOTE

The property affects only the size of the UI component container. To specify the size of a check box icon, provide the appropriate CSS rules.

CSS

#checkBoxContainer .dx-checkbox-icon{
    height: 20px;
    width: 20px;
}

hint

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

Type:

Default Value: undefined

hoverStateEnabled

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

Type:

Default Value: true

isValid

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

Type:

Default Value: true

NOTE

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

name

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

Type:

Default Value: ''

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

onContentReady

A function that is executed when the UI component's content is ready and each time the content is changed.

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name

Type

Description

component

CheckBox

The UI component's instance.

element

HTMLElement | jQuery

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

model

Model data. Available only when using Knockout.

Default Value: null

onDisposing

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name

Type

Description

component

CheckBox

The UI component's instance.

element

HTMLElement | jQuery

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

model

Model data. Available only if you use Knockout.

Default Value: null

onInitialized

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name

Type

Description

component

CheckBox

The UI component's instance.

element

HTMLElement | jQuery

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

Default Value: null

onOptionChanged

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
model	Object	Model data. Available only if you use Knockout.
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	CheckBox	The UI component's instance.
name	String	The modified property if it belongs to the first level. Otherwise, the first-level property it is nested into.
value	any	The modified property's new value.

Default Value: null

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

jQuery

index.js

$(function() {
    $("#checkBoxContainer").dxCheckBox({
        // ...
        onOptionChanged: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    });
});

Angular

app.component.html

app.component.ts

app.module.ts

<dx-check-box ...
    (onOptionChanged)="handlePropertyChange($event)"> 
</dx-check-box>

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 { DxCheckBoxModule } from 'devextreme-angular'; 

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

export class AppModule { }

Vue

App.vue

<template> 
    <DxCheckBox ...
        @option-changed="handlePropertyChange"
    />            
</template> 

<script> 
import 'devextreme/dist/css/dx.common.css'; 
import 'devextreme/dist/css/dx.light.css'; 
import DxCheckBox from 'devextreme-vue/check-box'; 

export default { 
    components: { 
        DxCheckBox
    }, 
    // ...
    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.common.css'; 
import 'devextreme/dist/css/dx.light.css'; 

import CheckBox from 'devextreme-react/check-box'; 

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

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

onValueChanged

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

Type:

Function parameters:

e:

Information about the event.

Object structure:

Name	Type	Description
component	CheckBox	The UI component's instance.
element	HTMLElement \| jQuery	The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery.
event	Event (jQuery or EventObject)	The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery. This field is undefined if the value is changed programmatically.
model	Object	Model data. Available only if Knockout is used.
previousValue	Object	The UI component's previous value.
value	Object	The UI component's new value.

Default Value: null

readOnly

Specifies whether the editor is read-only.

Type:

Default Value: false

rtlEnabled

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

Type:

DataGrid Demo Navigation UI Demo Editors Demo

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
});

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.

text

Specifies the text displayed by the check box.

Type:

Default Value: ''

validationError

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

Type:

Default Value: null

validationErrors

An array of the validation rules that failed.

Type:

Array<Object>

Default Value: null

validationMessageMode

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

Type:

Default Value: 'auto'

Accepted Values: 'always' | '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.

validationStatus

Indicates or specifies the current validation status.

Type:

Default Value: 'valid'

Accepted Values: 'valid' | 'invalid' | 'pending'

The following table illustrates the validation status indicators:

validationStatus	Indicator
`"pending"`
`"valid"`
`"invalid"`

value

Specifies the UI component state.

Type:

| undefined

Default Value: false

Raised Events: onValueChanged

The check box can be in one of the following states depending on the value property value.

checked
value is true
unchecked
value is false
undetermined
value is undefined

An end-user can change the UI component value using the Space key.

View Demo

visible

Specifies whether the UI component is visible.

Type: