JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myDiv">hello world what's up?</div>

JavaScript

var _text = "";
$(document).ready(function() {
    _text = $("#myDiv").text();
    StrikeThrough(0);
});

function StrikeThrough(index) {
    if (index >= _text.length)
        return false;
    var sToStrike = _text.substr(0, index + 1);
    var sAfter = (index < (_text.length - 1)) ? _text.substr(index + 1, _text.length - index) : "";
    $("#myDiv").html("<strike>" + sToStrike + "</strike>" + sAfter);
    window.setTimeout(function() {
        StrikeThrough(index + 1);
    }, 100);
}