Javascript Browser Window length Property

Introduction

Find out how many <iframe> elements there are in the window: 

var x = window.length;

Click the button to get the number of frames found on this page.

View in separate window 

<!DOCTYPE html>
<html>
<body>

<iframe src="https://www.cnn.com"></iframe>
<iframe src="https://www.bbc.com"></iframe>
<iframe src="https://www.nytimes.com"></iframe>
<button onclick="myFunction()">Test</button>

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

<script>
function myFunction() {/*from  w w w .j av a 2s . c om*/
  var x = window.length;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>

The length property returns the number of <iframe> elements in the current window.

This property is often used together with the window.frames property.

This property is read-only.




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