JSFiddle - React, Tailwind, and code Playground

HTML

<body>

<div id="DIV_js" style="display:none;">
var i = 'here' ;
function hello() {
  alert('toto says '  + i) ;
}
</div>
<script>

var ele = document.createElement("script") ;
ele.type = 'text/javascript' ;
ele.text = document.getElementById('DIV_js').innerHTML ;
    /*
document.body.insertBefore(ele, (document.getElementsByTagName("div"))[0]);
    */
    
    eval(ele.text);
</script>

<span onClick="hello();">Click to display alert</span>

</body>