Vue RadioGroup Props

An object defining configuration properties for the RadioGroup UI component.

accessKey

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

Selector: access-key
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.

Selector: active-state-enabled
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.

dataSource

Binds the UI component to data.

Selector: data-source
Default Value: null

The RadioGroup works with collections of objects or string, number, or boolean values.

Depending on your data source, bind RadioGroup to data as follows. In each case, also specify the valueExpr, displayExpr, or both if the data source provides objects.

  • Data Array
    Assign the array to the dataSource option.

  • Read-Only Data in JSON Format
    Set the dataSource property to the URL of a JSON file or service that returns JSON data.

  • OData
    Implement an ODataStore.

  • Web API, PHP, MongoDB
    Use one of the following extensions to enable the server to process data according to the protocol DevExtreme UI components use:

    Then, use the createStore method to configure access to the server on the client as shown below. This method is part of DevExtreme.AspNet.Data.

    jQuery
    JavaScript
    $(function() {
        let serviceUrl = "https://url/to/my/service";
        $("#radioGroupContainer").dxRadioGroup({
            // ...
            dataSource: DevExpress.data.AspNet.createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction",
                insertUrl: serviceUrl + "/InsertAction",
                updateUrl: serviceUrl + "/UpdateAction",
                deleteUrl: serviceUrl + "/DeleteAction"
            })
        })
    });
    Angular
    app.component.ts
    app.component.html
    app.module.ts
    import { Component } from '@angular/core';
    import CustomStore from 'devextreme/data/custom_store';
    import { createStore } from 'devextreme-aspnet-data-nojquery';
    
    @Component({
        selector: 'app-root',
        templateUrl: './app.component.html',
        styleUrls: ['./app.component.css']
    })
    export class AppComponent {
        store: CustomStore;
        constructor() {
            let serviceUrl = "https://url/to/my/service";
            this.store = createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction",
                insertUrl: serviceUrl + "/InsertAction",
                updateUrl: serviceUrl + "/UpdateAction",
                deleteUrl: serviceUrl + "/DeleteAction"
            })
        }
    }
    <dx-radio-group ...
        [dataSource]="store">
    </dx-radio-group>
    import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';
    import { AppComponent } from './app.component';
    
    import { DxRadioGroupModule } from 'devextreme-angular';
    
    @NgModule({
        declarations: [
            AppComponent
        ],
        imports: [
            BrowserModule,
            DxRadioGroupModule
        ],
        providers: [],
        bootstrap: [AppComponent]
    })
    export class AppModule { }
    Vue
    App.vue
    <template> 
        <DxRadioGroup ...
            :data-source="store" />
    </template>
    
    <script>
    import 'devextreme/dist/css/dx.light.css';
    
    import CustomStore from 'devextreme/data/custom_store';
    import { createStore } from 'devextreme-aspnet-data-nojquery';
    import { DxRadioGroup } from 'devextreme-vue/radio-group';
    
    export default {
        components: {
            DxRadioGroup
        },
        data() {
            const serviceUrl = "https://url/to/my/service";
            const store = createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction",
                insertUrl: serviceUrl + "/InsertAction",
                updateUrl: serviceUrl + "/UpdateAction",
                deleteUrl: serviceUrl + "/DeleteAction"
            });
            return {
                store
            }
        }
    }
    </script>
    React
    App.js
    import React from 'react';
    import 'devextreme/dist/css/dx.light.css';
    
    import CustomStore from 'devextreme/data/custom_store';
    import { createStore } from 'devextreme-aspnet-data-nojquery';
    import RadioGroup from 'devextreme-react/radio-group';
    
    const serviceUrl = "https://url/to/my/service";
    const store = createStore({
        key: "ID",
        loadUrl: serviceUrl + "/GetAction",
        insertUrl: serviceUrl + "/InsertAction",
        updateUrl: serviceUrl + "/UpdateAction",
        deleteUrl: serviceUrl + "/DeleteAction"
    });
    
    class App extends React.Component {
        render() {
            return (
                <RadioGroup ...
                    dataSource={store} />
            );
        }
    }
    export default App;
  • Any other data source
    Implement a CustomStore.

Regardless of the data source on the input, the RadioGroup always wraps it in the DataSource object. This object allows you to sort, filter, group, and perform other data shaping operations. To get its instance, call the getDataSource() method.

NOTE

Review the following notes about data binding:

  • Do not specify the items property if you specified the dataSource, and vice versa.

  • Data field names cannot be equal to this and should not contain the following characters: ., :, [, and ].

jQuery
  • The stores are immutable. You cannot change their configurations at runtime. Instead, create a new store or DataSource and assign it to the dataSource property as shown in the following help topic: Get and Set Properties.
Angular
  • The stores are immutable. You cannot change their configurations at runtime. Instead, create a new store or DataSource and assign it to the dataSource property as shown in the following help topic: Two-Way Property Binding.
Vue
  • The stores are immutable. You cannot change their configurations at runtime. Instead, create a new store or DataSource and assign it to the dataSource property as shown in the following help topic: Two-Way Property Binding.
React
  • The stores are immutable. You cannot change their configurations at runtime. Instead, create a new store or DataSource and assign it to the dataSource property as shown in the following help topic: Controlled Mode.

disabled

Specifies whether the UI component responds to user interaction.

Type:

Boolean

Default Value: false

displayExpr

Specifies the data field whose values should be displayed.

Selector: display-expr
Type:

String

|

Function

Function parameters:
item:

Object

The current item's data object.

Return Value:

String

The displayed value.

Default Value: undefined

Set this property to the name of a data field that provides displayed values...

displayExpr: "name"

... or to a function that returns the displayed value:

displayExpr: function(item) {
    // "item" can be null
    return item && 'ID: ' + item.id + ', Name: ' + item.name;
}

Leave this property unspecified or set it to this if the data source contains primitives.

See Also

elementAttr

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

Selector: DxElementAttr
Type:

Object

Default Value: {}

jQuery
$(function(){
    $("#radioGroupContainer").dxRadioGroup({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});
Angular
HTML
TypeScript
<dx-radio-group ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-radio-group>
import { DxRadioGroupModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxRadioGroupModule
    ],
    // ...
})
Vue
App.vue
<template>
    <DxRadioGroup ...
        :element-attr="radioGroupAttributes">
    </DxRadioGroup>
</template>

<script>
import DxRadioGroup from 'devextreme-vue/radio-group';

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

import RadioGroup from 'devextreme-react/radio-group';

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

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

focusStateEnabled

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

Selector: focus-state-enabled
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.

Selector: hover-state-enabled
Type:

Boolean

Default Value: true

isDirty

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

Selector: is-dirty
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 radioGroup = $('#radioGroup').dxRadioGroup({
        // ...
    }).dxRadioGroup('instance');

    $('#button').dxButton({
        // ...
        onClick () {
            if (radioGroup.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 { DxRadioGroupComponent, 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('radioGroupRef', { static: false }) radioGroup: DxRadioGroupComponent;

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

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

export default {
    components: {
        DxRadioGroup,
        DxButton
    },

    data() {
        return {
            radioGroupRef
        }
    },

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

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

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

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

    return (
        <RadioGroup ...
            ref={radioGroupRef}
        >
        </RadioGroup>
        <Button ...
            onClick={onClick}
        />
    );
};

export default App;
See Also

isValid

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

Selector: 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

items[]

An array of items displayed by the UI component.

Selector: DxItem

The items array can contain:

  • Objects with fields described in this section
  • Objects with any other fields. In this case, specify the itemTemplate.

If you need to update the UI component items, reassign the entire items array as shown in the following example:

JavaScript
radioGroupInstance.option('items', newItems);

As an alternative to items, you can use the dataSource property. It accepts the DataSource object, whose underlying stores provide an API that allows you to update individual items without reassigning the entire item collection.

NOTE
Do not use the items property if you use dataSource, and vice versa.

itemTemplate

Specifies a custom template for items.

Selector: item-template
Type:

template

Template Data:

Object

The current item's data.

Default Name: 'item'

layout

Specifies the radio group layout.

Type:

Orientation

Default Value: 'vertical', 'horizontal' (tablets)

The following values are available.

  • "vertical"
    Radio buttons are arranged vertically - as a column.

  • "horizontal"
    Radio buttons are arranged horizontally - as a row.

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.

onContentReady

A function that is executed when the UI component is rendered and each time the component is repainted.

Selector: @content-ready
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

RadioGroup

The UI component's instance.

Default Value: null

onDisposing

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

Selector: @disposing
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

RadioGroup

The UI component's instance.

Default Value: null

onInitialized

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

Selector: @initialized
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

RadioGroup

The UI component's instance.

Default Value: null

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

<script>
import DxRadioGroup from 'devextreme-vue/radio-group';

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

<script setup>
import DxRadioGroup from 'devextreme-vue/radio-group';

let radioGroupInstance = null;

const saveInstance = (e) => {
    radioGroupInstance = e.component;
}
</script>
React
App.js
import RadioGroup from 'devextreme-react/radio-group';

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

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

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

    render() {
        return (
            <div>
                <RadioGroup 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.

Selector: @option-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

RadioGroup

The UI component's instance.

Default Value: null

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

jQuery
index.js
$(function() {
    $("#radioGroupContainer").dxRadioGroup({
        // ...
        onOptionChanged: function(e) {
            if(e.name === "changedProperty") {
                // handle the property change here
            }
        }
    });
});
Angular
app.component.html
app.component.ts
app.module.ts
<dx-radio-group ...
    (onOptionChanged)="handlePropertyChange($event)"> 
</dx-radio-group>
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 { DxRadioGroupModule } from 'devextreme-angular'; 

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

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

<script>  
import 'devextreme/dist/css/dx.light.css'; 
import DxRadioGroup from 'devextreme-vue/radio-group'; 

export default { 
    components: { 
        DxRadioGroup
    }, 
    // ...
    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 RadioGroup from 'devextreme-react/radio-group'; 

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

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

onValueChanged

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

Selector: @value-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

RadioGroup

The UI component's instance.

Default Value: null

readOnly

Specifies whether the editor is read-only.

Selector: read-only
Type:

Boolean

Default Value: false

rtlEnabled

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

Selector: rtl-enabled
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

tabIndex

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

Selector: tab-index
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.

Selector: validation-error
Type: any
Default Value: null

See Also

validationErrors

An array of the validation rules that failed.

Selector: validation-errors
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.

Selector: validation-message-mode
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.

Selector: validation-message-position
Type:

Position

Default Value: 'bottom'

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

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

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

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

};
export default App;

validationStatus

Indicates or specifies the current validation status.

Selector: 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 radioGroup = $("#radioGroupContainer").dxRadioGroup({
        // ...
    }).dxRadioGroup("instance");

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

};
export default App;

value

Specifies the UI component's value.

Type: any
Default Value: null
Raised Events: onValueChanged

valueExpr

Specifies which data field provides unique values to the UI component's value.

Selector: value-expr
Type:

String

|

Function

Function parameters:
item:

Object

The current item's data object.

Return Value:

String

|

Number

|

Boolean

A unique item identifier.

Default Value: 'this'

When dataSource contains objects, you should define valueExpr to correctly identify data items. Otherwise, the component uses referential equality to compare objects, which may result in unexpected behavior.

If you use a store, the valueExpr property should have the same value as the key in the store. Alternatively, you can use this as a valueExpr but the key should be specified. Refer to the following article for more information: Troubleshooting - A Drop-Down Editor Does Not Show Data.

Do not use template as a valueExpr value.

NOTE
You cannot specify valueExpr as a function when the UI component is bound to a remote data source. This is because valueExpr is used in a filter the UI component sends to the server when querying data. Functions with custom logic cannot be serialized for this filter.
See Also

visible

Specifies whether the UI component is visible.

Type:

Boolean

Default Value: true

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.