Angular Form - Accessibility

Accessibility Features Overview

NOTE
The overall accessibility level of your application depends on the Form features that you use.
Accessibility Requirement Support Level
Right-to-Left Support
Keyboard Navigation Support
Screen Reader Support
Contrast Color Theme
Mobile Device Support
Lighthouse Accessibility Validation
Axe Accessibility Validation
WAVE Accessibility Validation
Section 508 Support
WCAG 2.x Support
  • - All component features meet the requirement
  • - Some component features may not meet the requirement
  • - Accessibility requirement is not supported

Accessibility Standards Compliance

The Form component meets a variety of Section 508 and WCAG 2.x compliance standards. Known exceptions:

Section 508 criteria WCAG 2.x criteria Exception description
501 (Web)(Software)
504.2 (Authoring Tool)
602.3 (Support Docs)		 1.4.3 Contrast (Minimum) (Level AA)
1.4.11 Non-text Contrast (Level AA 2.1 and 2.2)		 Form does not support Windows High Contrast themes.
- 4.1.3 Status Messages (Level AA 2.1 and 2.2) Validator with an AsyncRule and ValidationSummary.

Keyboard Navigation

A user can use the following keys to interact with the Form component:

Key Action
Shift + Tab Sets focus to the previous item.
Tab Sets focus to the next item.

Interacting with Form items depends on the type of the item.

Use the registerKeyHandler(key, handler) method to implement a custom handler for a key.

jQuery
JavaScript
function registerKeyHandlers () {
    const form = $("#formContainer").dxForm("instance");
    form.registerKeyHandler("backspace", function(e) {
        // The argument "e" contains information on the event
    });
    form.registerKeyHandler("space", function(e) {
        // ...
    });
}
Angular
TypeScript
import { ..., ViewChild, AfterViewInit } from '@angular/core';
import { DxFormModule, DxFormComponent } from 'devextreme-angular';
// ...
export class AppComponent implements AfterViewInit {
    @ViewChild(DxFormComponent, { static: false }) form: DxFormComponent;
    // Prior to Angular 8
    // @ViewChild(DxFormComponent) form: DxFormComponent;

    ngAfterViewInit () {
        this.form.instance.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.form.instance.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
@NgModule({
    imports: [
        // ...
        DxFormModule
    ],
    // ...
})
Vue
<template>
    <DxForm :ref="myFormRef" />
</template>
<script>
import 'devextreme/dist/css/dx.light.css';

import DxForm from 'devextreme-vue/form';

const myFormRef = 'my-form';

export default {
    components: {
        DxForm
    },
    data() {
        return {
            myFormRef
        }
    },
    computed: {
        form: function() {
            return this.$refs[myFormRef].instance;
        }
    },
    mounted: function() {
        this.form.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.form.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { Form } from 'devextreme-react/form';

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

        this.formRef = React.createRef();
    }

    render() {
        return (
            <Form ref={this.formRef} />
        );
    }

    get form() {
        return this.formRef.current.instance();
    }

    componentDidMount() {
        this.form.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.form.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}

export default App;

Screen Reader Support

The Form component supports screen readers and complies to WAI-ARIA standards.