const calendar = $('#calendarContainer').dxCalendar('instance');

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

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

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

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

<template>
    <DxCalendar ref="calendarRef" />
</template>

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

const calendarRef = ref<DxCalendar | null>(null);

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

</script>

import React, { useRef, useEffect } from 'react';
import { Calendar, type CalendarRef } from 'devextreme-react/calendar';

function App() {
    const calendarRef = useRef<CalendarRef>(null);

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

    return (
        <Calendar ref={calendarRef} />
    );
}