Angular ContextMenu - Keyboard Support

An end user can use the following keys to interact with the UI component.

Key Action
← Closes the submenu and focuses on its parent item.
→ Opens the submenu of the focused item.
Home Sets focus to the first item in the menu/submenu.
End Sets focus to the last item in the menu/submenu.
Space Switches the focused item to the selected state.
Enter Chooses the focused item.

You can implement a custom handler for a key using the registerKeyHandler(key, handler) method.

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

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

import DxContextMenu from 'devextreme-vue/context-menu';

const myContextMenuRef = 'my-context-menu';

export default {
    components: {
        DxContextMenu
    },
    data() {
        return {
            myContextMenuRef
        }
    },
    computed: {
        contextMenu: function() {
            return this.$refs[myContextMenuRef].instance;
        }
    },
    mounted: function() {
        this.contextMenu.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.contextMenu.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 { ContextMenu } from 'devextreme-react/context-menu';

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

        this.contextMenuRef = React.createRef();
    }

    render() {
        return (
            <ContextMenu ref={this.contextMenuRef} />
        );
    }

    get contextMenu() {
        return this.contextMenuRef.current.instance;
    }

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

export default App;
See Also