JSFiddle - React, Tailwind, and code Playground

HTML

<div id="randomThing"></div>

JavaScript

$( function() {
    $( '#randomThing' ).on( 'watch', function() {
        $(this).append( $( '<p>' ).text( "I've been watched!" ) );
    } );
    
    setInterval( function() {
        $( '#randomThing' ).trigger( 'watch' );
    }, 1000 );
} );