Get your own website Result Size: 625 x 565
x
 
<!DOCTYPE html>
<html>
<body>
<h1>The Window Object</h1>
<h2>The frames Property</h2>
<p>Number of frames in this window:</p>
<p id="demo"></p>
<iframe style="width:100%;height:100px"></iframe>
<iframe style="width:100%;height:100px"></iframe>
<iframe style="width:100%;height:100px"></iframe>
<script>
let length = window.length;
document.getElementById("demo").innerHTML = length;
</script>
</body>
</html>