Position popup open in React Drop down button component

7 Aug 20234 minutes to read

Popup open position can be changed according to the requirement. Popup open position can be changed in open event by setting top and left for the popup element.

In the following example, the top position of the popup element is changed in open event.

app.jsx

import { enableRipple } from '@syncfusion/ej2-base';
import { DropDownButtonComponent } from '@syncfusion/ej2-react-splitbuttons';
import * as React from 'react';
import * as ReactDom from 'react-dom';
enableRipple(true);
// To render DropDownButton.
function App() {
    let ddb;
    let items = [
        {
            text: 'Cut'
        },
        {
            text: 'Copy'
        },
        {
            text: 'Paste'
        }
    ];
    // To open popup in particular position.
    function onOpen(args) {
        const elem = args.element.parentElement;
        elem.style.top = ddb.element.getBoundingClientRect().top - elem.offsetHeight + 'px';
    }
    return (<div>
        <DropDownButtonComponent ref={(scope) => { ddb = scope; }} items={items} open={onOpen} cssClass='e-caret-up'>Clipboard</DropDownButtonComponent>
      </div>);
}
export default App;
ReactDom.render(<App />, document.getElementById('button'));

app.tsx

import { enableRipple } from '@syncfusion/ej2-base';
import { DropDownButtonComponent, ItemModel, OpenCloseMenuEventArgs } from '@syncfusion/ej2-react-splitbuttons';
import * as React from 'react';
import * as ReactDom from 'react-dom';

enableRipple(true);

// To render DropDownButton.
function App() {
    let ddb: DropDownButtonComponent;
    let items: ItemModel[] = [
      {
          text: 'Cut'
      },
      {
          text: 'Copy'
      },
      {
          text: 'Paste'
      }];
    // To open popup in particular position.
    function onOpen (args: OpenCloseMenuEventArgs) {
      const elem = (args.element.parentElement as HTMLElement);
      elem.style.top = ddb.element.getBoundingClientRect().top - elem.offsetHeight +'px';
    }
  
    return (
      <div>
        <DropDownButtonComponent ref= {(scope) => { ddb = scope as DropDownButtonComponent; } } items = {items} open={onOpen} cssClass='e-caret-up'>Clipboard</DropDownButtonComponent>
      </div>
    );
  }
export default App;
ReactDom.render(<App />,document.getElementById('button'));