<html>
<body>
<h2>JavaScript Regular Expressions</h2>
<p>Do a global search for a "1", followed by zero or one "0" characters:</p>
<p id="demo"></p>
<script>
let text = "1, 100 or 1000?";
let result = text.match(/10?/g);
document.getElementById("demo").innerHTML = result;
</script>
</body>
</html>