The following example demonstrate about how to remove an item from DropDownList.
import { DropDownListComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component {
constructor() {
super(...arguments);
// define the array of data
this.sportsData = [
{ Id: 'game1', Game: 'Badminton' },
{ Id: 'game2', Game: 'Football' },
{ Id: 'game3', Game: 'Tennis' }
];
// maps the appropriate column to fields property
this.fields = { text: 'Game', value: 'Id' };
}
onclick() {
if (this.dropDownListObject.list) {
// Remove the selected value if 0th index selected
if (this.dropDownListObject.index === 0) {
this.dropDownListObject.value = null;
this.dropDownListObject.dataBind();
}
// remove first item in list
(this.dropDownListObject.list.querySelectorAll('li')[0]).remove();
if (!this.dropDownListObject.list.querySelectorAll('li')[0]) {
this.dropDownListObject.dataSource = [];
// enable the nodata template when no data source is empty.
this.dropDownListObject.list.classList.add('e-nodata');
}
}
else {
// remove first item in list
this.dropDownListObject.dataSource.splice(0, 1);
}
}
render() {
return (
// specifies the tag for render the DropDownList component
<div>
<DropDownListComponent id="ddlelement" ref={(scope) => { this.dropDownListObject = scope; }} dataSource={this.sportsData} fields={this.fields} placeholder="Select a game"/>
<button id='btn' className="e-control e-btn" onClick={this.onclick = this.onclick.bind(this)}>
Remove 0th item </button>
</div>);
}
}
ReactDOM.render(<App />, document.getElementById('sample'));<!DOCTYPE html>
<html lang="en">
<head>
<title>Syncfusion React DropDownList</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/ej2/20.3.47/ej2-base/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.3.47/ej2-react-inputs/styles/material.css" rel="stylesheet" />
<link href="//cdn.syncfusion.com/ej2/20.3.47/ej2-react-dropdowns/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 { DropDownListComponent } from '@syncfusion/ej2-react-dropdowns';
import * as React from 'react';
import * as ReactDOM from 'react-dom';
export default class App extends React.Component<{}, {}> {
// define the array of data
private sportsData: { [key: string]: Object }[] = [
{ Id: 'game1', Game: 'Badminton' },
{ Id: 'game2', Game: 'Football' },
{ Id: 'game3', Game: 'Tennis' }
];
// maps the appropriate column to fields property
private fields: object = { text: 'Game', value: 'Id' };
private dropDownListObject:any;
public onclick(){
if (this.dropDownListObject.list) {
// Remove the selected value if 0th index selected
if (this.dropDownListObject.index === 0) {
this.dropDownListObject.value = null;
this.dropDownListObject.dataBind();
}
// remove first item in list
(this.dropDownListObject.list.querySelectorAll('li')[0]).remove();
if (!this.dropDownListObject.list.querySelectorAll('li')[0]) {
this.dropDownListObject.dataSource = [];
// enable the nodata template when no data source is empty.
this.dropDownListObject.list.classList.add('e-nodata');
}
} else {
// remove first item in list
this.dropDownListObject.dataSource.splice(0, 1);
}
}
public render() {
return (
// specifies the tag for render the DropDownList component
<div>
<DropDownListComponent id="ddlelement" ref={(scope) => { this.dropDownListObject = scope; }} dataSource={this.sportsData} fields={this.fields} placeholder="Select a game" />
<button id='btn' className="e-control e-btn" onClick={this.onclick = this.onclick.bind(this)}>
Remove 0th item </button>
</div>
);
}
}
ReactDOM.render(<App />, document.getElementById('sample'));