luau/docs/_includes/repl.html

<form>
    <div>
        <label>Script:</label>
        <br>
        <div id="demoscript">
        </div> 
        <br><br>
        <button onclick="clearInput(); return false;">
            Clear Input
        </button>
        <button onclick="executeScript(); return false;">
            Run
        </button>
    </div>
    <br><br>
    <div>
        <label>Output:</label>
        <br>
        <textarea readonly rows="10" cols="70" id="output"></textarea>
        <br><br>
        <button onclick="clearOutput(); return false;">
            Clear Output
        </button>
    </div>
</form>
<style>
    #demoscript {
      position: relative;
	    left: 0;
	    top: 0;
	    width: 100%;
	    height: 300px;
	    margin: 0;
	    padding: 0;
	    overflow: hidden;
    }
</style>
<script src="assets/js/vs/loader.js"></script>
<script async src="https://github.com/Roblox/luau/releases/download/0.505/Luau.Web.js"></script>
<script type="text/javascript" src="/assets/js/repl.js"></script>