All docs
V22.1
24.1
The page you are viewing does not exist in version 24.1.
23.2
The page you are viewing does not exist in version 23.2.
23.1
22.2
22.1
21.2
21.1
20.2
20.1
19.2
The page you are viewing does not exist in version 19.2.
19.1
The page you are viewing does not exist in version 19.1.
18.2
The page you are viewing does not exist in version 18.2.
18.1
The page you are viewing does not exist in version 18.1.
17.2
The page you are viewing does not exist in version 17.2.
A newer version of this page is available. Switch to the current version.

jQuery TreeView - Keyboard Support

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

Key Action
Shift + Mouse Wheel Scrolls the content left/right if the scrollDirection property is "horizontal" or "both".
↑ / ↓ Moves focus to the previous/next node.
Home / End Moves focus to the first/last node.
Expands the node.
Collapses the node.
Asterisk Sign (*) Expands all nodes. Available only if expandAllEnabled is set to true.
Minus Sign (-) Collapses all nodes. Available only if expandAllEnabled is set to true.
Enter or Space Selects the node.
Shift + ↑ / Shift + ↓ Extends selection up/down by one node.
Shift + Home Extends selection up to the first node.
Shift + End Extends selection down to the last node.

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

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

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

import DxTreeView from 'devextreme-vue/tree-view';

const myTreeViewRef = 'my-tree-view';

export default {
    components: {
        DxTreeView
    },
    data() {
        return {
            myTreeViewRef
        }
    },
    computed: {
        treeView: function() {
            return this.$refs[myTreeViewRef].instance;
        }
    },
    mounted: function() {
        this.treeView.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.treeView.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
</script>
React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { TreeView } from 'devextreme-react/tree-view';

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

        this.treeViewRef = React.createRef();
    }

    render() {
        return (
            <TreeView ref={this.treeViewRef} />
        );
    }

    get treeView() {
        return this.treeViewRef.current.instance;
    }

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

export default App;
See Also