To enable or disable items in the list box, enableItems method can be used. In the following example, the Bugatti Veyron Super Sport and SSC Ultimate Aero items are disabled by default and by clicking Enable Items buttons, the disabled items will be enabled.
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ListBoxComponent } from '@syncfusion/ej2-react-dropdowns';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
export default class App extends React.Component {
constructor() {
super(...arguments);
this.data = [
{ text: 'Hennessey Venom', id: 'list-01' },
{ text: 'Bugatti Chiron', id: 'list-02' },
{ text: 'Bugatti Veyron Super Sport', id: 'list-03' },
{ text: 'SSC Ultimate Aero', id: 'list-04' },
{ text: 'Koenigsegg CCR', id: 'list-05' },
{ text: 'McLaren F1', id: 'list-06' },
{ text: 'Aston Martin One- 77', id: 'list-07' },
{ text: 'Jaguar XJ220', id: 'list-08' },
{ text: 'McLaren P1', id: 'list-09' },
{ text: 'Ferrari LaFerrari', id: 'list-10' },
];
}
enableitem() {
this.listboxobj.enableItems(['Bugatti Veyron Super Sport', 'SSC Ultimate Aero'], true);
}
created() {
this.listboxobj.enableItems(['Bugatti Veyron Super Sport', 'SSC Ultimate Aero'], false);
}
render() {
return (<div>
<ListBoxComponent dataSource={this.data} ref={(scope) => this.listboxobj = scope} created={this.created.bind(this)}/>
<ButtonComponent onClick={this.enableitem.bind(this)}>Enable Items</ButtonComponent>
</div>);
}
}
ReactDOM.render(<App />, document.getElementById('sample'));<!DOCTYPE html>
<html lang="en">
<head>
<title>Syncfusion React ListBox</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for React Components" />
<meta name="author" content="Syncfusion" />
<link href="//cdn.syncfusion.com/ej2/20.1.58/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.1.58/ej2-react-inputs/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.1.58/ej2-react-dropdowns/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.1.58/ej2-react-buttons/styles/material.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<style>
#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
</style>
</head>
<body>
<div id='sample' style="margin: 20px auto 0; width:250px;">
<div id='loader'>Loading....</div>
</div>
</body>
</html>import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ListBoxComponent } from '@syncfusion/ej2-react-dropdowns';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
export default class App extends React.Component<{}, {}> {
private data: { [key: string]: Object }[] = [
{ text: 'Hennessey Venom', id: 'list-01' },
{ text: 'Bugatti Chiron', id: 'list-02' },
{ text: 'Bugatti Veyron Super Sport', id: 'list-03' },
{ text: 'SSC Ultimate Aero', id: 'list-04' },
{ text: 'Koenigsegg CCR', id: 'list-05' },
{ text: 'McLaren F1', id: 'list-06' },
{ text: 'Aston Martin One- 77', id: 'list-07' },
{ text: 'Jaguar XJ220', id: 'list-08' },
{ text: 'McLaren P1', id: 'list-09' },
{ text: 'Ferrari LaFerrari', id: 'list-10' },
];
public listboxobj:ListBoxComponent;
public enableitem(): void {
this.listboxobj.enableItems(['Bugatti Veyron Super Sport', 'SSC Ultimate Aero'], true);
}
public created():void {
this.listboxobj.enableItems(['Bugatti Veyron Super Sport', 'SSC Ultimate Aero'], false);
}
render() {
return (
<div>
<ListBoxComponent dataSource={this.data} ref={(scope) => this.listboxobj = scope as ListBoxComponent} created={this.created.bind(this)} />
<ButtonComponent onClick={this.enableitem.bind(this)}>Enable Items</ButtonComponent>
</div>
);
}
}
ReactDOM.render(<App />, document.getElementById('sample'));