JSFiddle - React, Tailwind, and code Playground

HTML

<script>
    function rendered() {
        //Render complete
        alert("image rendered");
    }
    
    function startRender() {
        //Rendering start
        requestAnimationFrame(rendered);
    }

    function loaded()  {
        requestAnimationFrame(startRender);
    }
</script>
<img src="https://mumofthreedevils.files.wordpress.com/2014/05/godzilla.jpg" style="width: 300px; height: 300px" onload="loaded();">