JSFiddle - React, Tailwind, and code Playground

by bluey

HTML

<div id='timer'>
    <span id='num' class='num'>0</span>
    <span id='num' class='num'>0</span>
    
    <span id='split1' class='split'>:</span>
    
    <span id='num' class='num'>0</span>
    <span id='num' class='num'>0</span>
    
    <span id='split2' class='split'>:</span>
    
    <span id='num' class='num'>0</span>
    <span id='num' class='num'>0</span>
</div>

JavaScript

/**
every second, 
    create random char from regex, 
        write char "different of previous one" to each class='num'AS-span.child of timer.
**/