<!DOCTYPE html>
<html lang="en-US">
<body>
<p>Click the button to return the string of the RegExp pattern.</p>
<button onclick="myFunction()">Click me</button>
<p id="point"></p>
<script>
function myFunction(){
var str = "a1 b12 c144 d1728 e20736";
var pattern = /\d{3}/g;
var result = "RegExp : " +pattern.source;
document.getElementById("point").innerHTML = result;
}
</script> </body>
</html>