const menu = $('#menuContainer').dxMenu('instance');

menu.registerKeyHandler('backspace', function(e) {
    // The argument 'e' contains information about the event
});
menu.registerKeyHandler('space', function(e) {
    // ...
});

import { ViewChild, AfterViewInit } from '@angular/core';
import { DxMenuComponent } from 'devextreme-angular/ui/menu';

@Component({
    imports: [DxMenuComponent],
    // ...
})
export class AppComponent implements AfterViewInit {
    @ViewChild(DxMenuComponent, { static: false }) menu!: DxMenuComponent;
    // Prior to Angular 8
    // @ViewChild(DxMenuComponent) menu: DxMenuComponent;

    ngAfterViewInit () {
        this.menu.instance.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information about the event
        });
        this.menu.instance.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}

<template>
    <DxMenu ref="menuRef" />
</template>

<script setup lang="ts">
import { onMounted, ref } from 'vue';
import { DxMenu } from 'devextreme-vue/menu';

const menuRef = ref<DxMenu | null>(null);

onMounted(() => {
    menuRef.value.instance.registerKeyHandler('backspace', function(e) {
        // The argument "e" contains information about the event
    });
    menuRef.value.instance.registerKeyHandler('space', function(e) {
        // ...
    });
})

</script>

import React, { useRef, useEffect } from 'react';
import { Menu, type MenuRef } from 'devextreme-react/menu';

function App() {
    const menuRef = useRef<MenuRef>(null);

    useEffect(() => {
        const menu = menuRef.current.instance();
        menu.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information about the event
        });
        menu.registerKeyHandler('space', function(e) {
            // ...
        });
    }, []);

    return (
        <Menu ref={menuRef} />
    );
}