Create mnemonic ui in menuitem in React Menu component

30 Jan 20238 minutes to read

A particular character in a text can be underlined in the beforeItemRender event by adding <u> tag in between the text and assign the innerHTML to the li element.

In the following example, the first character in File, Open, and Save menu items are underlined.

index.jsx

import { enableRipple } from '@syncfusion/ej2-base';
import { MenuComponent } from '@syncfusion/ej2-react-navigations';
import * as React from 'react';
import * as ReactDom from 'react-dom';
enableRipple(true);
function App() {
    let menuObj;
    let menuItems = [
        {
            iconCss: 'em-icons e-file',
            items: [
                { text: 'Open', iconCss: 'em-icons e-open' },
                { text: 'Save', iconCss: 'e-icons e-save' },
                { separator: true },
                { text: 'Exit' }
            ],
            text: 'File'
        },
        {
            iconCss: 'em-icons e-edit',
            items: [
                { text: 'Cut', iconCss: 'em-icons e-cut' },
                { text: 'Copy', iconCss: 'em-icons e-copy' },
                { text: 'Paste', iconCss: 'em-icons e-paste' }
            ],
            text: 'Edit'
        },
        { text: 'Format' },
        { text: 'View' },
        { text: 'Bookmarks' },
        { text: 'Tools' },
        { separator: true },
        { text: 'Help' }
    ];
    function beforeItemRender(args) {
        if (['File', 'Open', 'Save'].indexOf(args.item.text) > -1) {
            // To underline a First character.
            const underlinedText = '<u>' + args.item.text.slice(0, 1) + '</u>' + args.item.text.slice(1);
            args.element.innerHTML = args.element.innerHTML.replace(args.item.text, underlinedText);
        }
    }
    return (<MenuComponent items={menuItems} beforeItemRender={beforeItemRender}/>);
}
export default App;
ReactDom.render(<App />, document.getElementById('element'));

index.tsx

import { enableRipple } from '@syncfusion/ej2-base';
import { MenuComponent, MenuEventArgs, MenuItemModel } from '@syncfusion/ej2-react-navigations';
import * as React from 'react';
import * as ReactDom from 'react-dom';
enableRipple(true);

function App() {
    let menuObj: MenuComponent;

    let menuItems: MenuItemModel[] = [
        {
            iconCss: 'em-icons e-file',
            items: [
                { text: 'Open', iconCss: 'em-icons e-open' },
                { text: 'Save', iconCss: 'e-icons e-save' },
                { separator: true },
                { text: 'Exit' }
            ],
            text: 'File'
        },
        {
            iconCss: 'em-icons e-edit',
            items: [
                { text: 'Cut', iconCss: 'em-icons e-cut' },
                { text: 'Copy', iconCss: 'em-icons e-copy' },
                { text: 'Paste', iconCss: 'em-icons e-paste' }
            ],
            text: 'Edit'
        },
        { text: 'Format' },
        { text: 'View' },
        { text: 'Bookmarks' },
        { text: 'Tools' },
        { separator: true },
        { text: 'Help' }
    ];

    function beforeItemRender(args: MenuEventArgs): void {
        if (['File', 'Open', 'Save'].indexOf(args.item.text) > -1) {
            // To underline a First character.
            const underlinedText = '<u>' + args.item.text.slice(0, 1) + '</u>' + args.item.text.slice(1);
            args.element.innerHTML = args.element.innerHTML.replace(args.item.text, underlinedText);
        }
    }

    return (
        <MenuComponent items={menuItems} beforeItemRender={beforeItemRender}/>
    );
}
export default App;
ReactDom.render(<App />,document.getElementById('element'));