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Underline a character in the item text

Underline a particular character in a text can be handled in beforeItemRenderevent by adding <u> tag in between the text and given as innerHTML in li rendering.

In the following example, C is underlined in the text Copy.

Source
Preview
app.tsx
index.html
styles.css
app.jsx
import { enableRipple } from '@syncfusion/ej2-base';
import { DropDownButtonComponent, ItemModel, MenuEventArgs } from '@syncfusion/ej2-react-splitbuttons';
import * as React from 'react';
import * as ReactDom from 'react-dom';

enableRipple(true);

// To render DropDownButton.
class App extends React.Component<{}, {}> {

  public items: ItemModel[] = [
    {
        text: 'Cut'
    },
    {
        text: 'Copy'
    },
    {
        text: 'Paste'
    }];

  public itemRender(args: MenuEventArgs) {
    if (args.item.text === 'Copy') {
        // To underline a particular text.
        args.element.innerHTML = '<u>C</u>opy';
    }
  }
  public render() {
    return (
      <div>
        <DropDownButtonComponent items = {this.items} beforeItemRender={this.itemRender}>Clipboard</DropDownButtonComponent>
      </div>
    );
  }
}
ReactDom.render(<App />,document.getElementById('button'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React DropDownButton</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="styles.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='button'>
        <div id='loader'>Loading...</div>
    </div>
</body>

</html>
#container {
    visibility: hidden;
}

#loader {
  color: #008cff;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}
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.
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.items = [
            {
                text: 'Cut'
            },
            {
                text: 'Copy'
            },
            {
                text: 'Paste'
            }
        ];
    }
    itemRender(args) {
        if (args.item.text === 'Copy') {
            // To underline a particular text.
            args.element.innerHTML = '<u>C</u>opy';
        }
    }
    render() {
        return (<div>
        <DropDownButtonComponent items={this.items} beforeItemRender={this.itemRender}>Clipboard</DropDownButtonComponent>
      </div>);
    }
}
ReactDom.render(<App />, document.getElementById('button'));