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<!DOCTYPE html>
<html>
<body>
​
<p>Click the button to set "blue", "house" and "car" to upper-case, in the paragraph below:</p>
​
<p id="demo">Mr Blue has a blue house and a blue car.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction() {
  var str = document.getElementById("demo").innerHTML; 
  var res = str.replace(/blue|house|car/gi, function (x) {
    return x.toUpperCase();
  });
  document.getElementById("demo").innerHTML = res;
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_replace4 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:01:37 GMT -->
</html>
​
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