React 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