Angular Accordion - Keyboard Support
An end user can use the following keys to interact with the UI component.
Key | Action |
---|---|
↑ or PageUp | Sets focus to the previous panel. |
↓ or PageDown | Sets focus to the next panel. |
Home | Sets focus to the first panel. |
End | Sets focus to the last panel. |
Enter | Expands the focused panel. |
Space | Collapses the focused panel. |
You can implement a custom handler for a key using the registerKeyHandler(key, handler) method.
jQuery
JavaScript
function registerKeyHandlers () { const accordion = $("#accordionContainer").dxAccordion("instance"); accordion.registerKeyHandler("backspace", function(e) { // The argument "e" contains information on the event }); accordion.registerKeyHandler("space", function(e) { // ... }); }
Angular
TypeScript
import { ..., ViewChild, AfterViewInit } from '@angular/core'; import { DxAccordionModule, DxAccordionComponent } from 'devextreme-angular'; // ... export class AppComponent implements AfterViewInit { @ViewChild(DxAccordionComponent, { static: false }) accordion: DxAccordionComponent; // Prior to Angular 8 // @ViewChild(DxAccordionComponent) accordion: DxAccordionComponent; ngAfterViewInit () { this.accordion.instance.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.accordion.instance.registerKeyHandler('space', function(e) { // ... }); } } @NgModule({ imports: [ // ... DxAccordionModule ], // ... })
Vue
<template> <DxAccordion :ref="myAccordionRef" /> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxAccordion from 'devextreme-vue/accordion'; const myAccordionRef = 'my-accordion'; export default { components: { DxAccordion }, data() { return { myAccordionRef } }, computed: { accordion: function() { return this.$refs[myAccordionRef].instance; } }, mounted: function() { this.accordion.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.accordion.registerKeyHandler('space', function(e) { // ... }); } } </script>
React
App.js
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import { Accordion } from 'devextreme-react/accordion'; class App extends React.Component { constructor(props) { super(props); this.accordionRef = React.createRef(); } render() { return ( <Accordion ref={this.accordionRef} /> ); } get accordion() { return this.accordionRef.current.instance; } componentDidMount() { this.accordion.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.accordion.registerKeyHandler('space', function(e) { // ... }); } } export default App;
See Also
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
- Accordion Demos
- Accordion API Reference
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