Angular ButtonGroup - Accessibility

function registerKeyHandlers () {
    const buttonGroup = $("#buttonGroupContainer").dxButtonGroup("instance");
    buttonGroup.registerKeyHandler("backspace", function(e) {
        // The argument "e" contains information on the event
    });
    buttonGroup.registerKeyHandler("space", function(e) {
        // ...
    });
}

import { ..., ViewChild, AfterViewInit } from '@angular/core';
import { DxButtonGroupModule, DxButtonGroupComponent } from 'devextreme-angular';
// ...
export class AppComponent implements AfterViewInit {
    @ViewChild(DxButtonGroupComponent, { static: false }) buttonGroup: DxButtonGroupComponent;
    // Prior to Angular 8
    // @ViewChild(DxButtonGroupComponent) buttonGroup: DxButtonGroupComponent;

    ngAfterViewInit () {
        this.buttonGroup.instance.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.buttonGroup.instance.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
@NgModule({
    imports: [
        // ...
        DxButtonGroupModule
    ],
    // ...
})

<template>
    <DxButtonGroup :ref="myButtonGroupRef" />
</template>
<script>
import 'devextreme/dist/css/dx.light.css';

import DxButtonGroup from 'devextreme-vue/button-group';

const myButtonGroupRef = 'my-button-group';

export default {
    components: {
        DxButtonGroup
    },
    data() {
        return {
            myButtonGroupRef
        }
    },
    computed: {
        buttonGroup: function() {
            return this.$refs[myButtonGroupRef].instance;
        }
    },
    mounted: function() {
        this.buttonGroup.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.buttonGroup.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
</script>

import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { ButtonGroup } from 'devextreme-react/button-group';

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

        this.buttonGroupRef = React.createRef();
    }

    render() {
        return (
            <ButtonGroup ref={this.buttonGroupRef} />
        );
    }

    get buttonGroup() {
        return this.buttonGroupRef.current.instance();
    }

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

export default App;