JavaScript/jQuery List - Keyboard Support
An end user can use the following keys to interact with the UI component.
| Key | Action |
|---|---|
| ↑ / ↓ | Moves focus to the previous/next item. |
| Page Up / Page Down | Moves focus to the item located a screen above/below the current one. |
| Home / End | Moves focus to the first/last item. |
| Enter or Space | Selects the focused item. |
| Shift + ↑ / ↓ | Shifts the focused item one item up/down. Active if the allowItemReordering property is set to true. |
| Delete | Removes the focused item. Active if the allowItemDeleting property is set to true. |
You can implement a custom handler for a key using the registerKeyHandler(key, handler) method.
jQuery
JavaScript
function registerKeyHandlers () {
const list = $("#listContainer").dxList("instance");
list.registerKeyHandler("backspace", function(e) {
// The argument "e" contains information on the event
});
list.registerKeyHandler("space", function(e) {
// ...
});
}Angular
TypeScript
import { ..., ViewChild, AfterViewInit } from '@angular/core';
import { DxListModule, DxListComponent } from 'devextreme-angular';
// ...
export class AppComponent implements AfterViewInit {
@ViewChild(DxListComponent, { static: false }) list: DxListComponent;
// Prior to Angular 8
// @ViewChild(DxListComponent) list: DxListComponent;
ngAfterViewInit () {
this.list.instance.registerKeyHandler('backspace', function(e) {
// The argument "e" contains information on the event
});
this.list.instance.registerKeyHandler('space', function(e) {
// ...
});
}
}
@NgModule({
imports: [
// ...
DxListModule
],
// ...
})Vue
<template>
<DxList :ref="myListRef" />
</template>
<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';
import DxList from 'devextreme-vue/list';
const myListRef = 'my-list';
export default {
components: {
DxList
},
data() {
return {
myListRef
}
},
computed: {
list: function() {
return this.$refs[myListRef].instance;
}
},
mounted: function() {
this.list.registerKeyHandler('backspace', function(e) {
// The argument "e" contains information on the event
});
this.list.registerKeyHandler('space', function(e) {
// ...
});
}
}
</script>React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';
import { List } from 'devextreme-react/list';
class App extends React.Component {
constructor(props) {
super(props);
this.listRef = React.createRef();
}
render() {
return (
<List ref={this.listRef} />
);
}
get list() {
return this.listRef.current.instance;
}
componentDidMount() {
this.list.registerKeyHandler('backspace', function(e) {
// The argument "e" contains information on the event
});
this.list.registerKeyHandler('space', function(e) {
// ...
});
}
}
export default App;See Also
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
- List - Item Deletion - User Interaction
- List Demos
- List API Reference
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