Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<body>

<p>Click the button to return the text of the RegExp pattern.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var str = "Visit W3Schools";
    var patt1 = /W3S/g;
    var res = "The text of the RegExp is: " + patt1.source;
    document.getElementById("demo").innerHTML = res;
}
</script>

</body>
</html>