Close popup in React Drop down list component

21 Feb 20263 minutes to read

Use the hidePopup method in DropDownList to close the popup when the window scroll event is triggered.

The following example demonstrates how to close the popup on scroll:

index.jsx

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 {
    dropDownListObject;
    // define the data with category
    sportsData = [
        'Badminton', 'Cricket', 'Football', 'Golf', 'Tennis'
    ];
    constructor(props) {
        super(props);
        window.addEventListener('scroll', this.handleScroll.bind(this));
    }
    // on scroll event
    handleScroll() {
        this.dropDownListObject.hidePopup();
    }
    render() {
        return (
        // specifies the tag for render the DropDownList component
        <DropDownListComponent id="ddlelement" ref={(scope) => { this.dropDownListObject = scope; }} dataSource={this.sportsData} placeholder="Select a game"/>);
    }
}
ReactDOM.render(<App />, document.getElementById('sample'));

index.tsx

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<{}, {}> {
  private dropDownListObject: any;
  // define the data with category
  private sportsData: { [key: string]: Object }[] = [
    'Badminton', 'Cricket', 'Football', 'Golf', 'Tennis'];
  constructor(props: any){
      super(props);
     window.addEventListener('scroll', this.handleScroll.bind(this));
  }  
  // on scroll event
  public handleScroll() {
    this.dropDownListObject.hidePopup();
  }
  public render() {
    return (

      // specifies the tag for render the DropDownList component
      <DropDownListComponent id="ddlelement" ref={(scope) => { this.dropDownListObject = scope; }} dataSource={this.sportsData} placeholder="Select a game" />
    );
  }
}
ReactDOM.render(<App />, document.getElementById('sample'));