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. |
| 11.5.2.15 Change notification | 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.
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