const dateBox = $('#dateBoxContainer').dxDateBox('instance');

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

import { ViewChild, AfterViewInit } from '@angular/core';
import { DxDateBoxComponent } from 'devextreme-angular/ui/date-box';

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

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

<template>
    <DxDateBox ref="dateBoxRef" />
</template>

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

const dateBoxRef = ref<DxDateBox | null>(null);

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

</script>

import React, { useRef, useEffect } from 'react';
import { DateBox, type DateBoxRef } from 'devextreme-react/date-box';

function App() {
    const dateBoxRef = useRef<DateBoxRef>(null);

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

    return (
        <DateBox ref={dateBoxRef} />
    );
}