How to Execute a Callback When an IFRAME Completes Loading?

Executing a Callback Upon IFRAME Load Completion

When working with IFRAMEs, executing a callback once the loading process is complete can be a crucial requirement. However, this task can become challenging, especially if you lack control over the IFRAME's content.

To address this issue, you can employ techniques that involve modifying the IFRAME creation and incorporating a timeout mechanism. By programmatically creating the IFRAME, you gain the ability to add an event listener to it. The following code demonstrates how to achieve this:

<code class="javascript">$(iFrameObj).load(function() {
  document.body.removeChild(iFrameObj);
  setTimeout(function() {
    callback(iFrameObj.innerHTML);
  }, 50);
});</code>

As demonstrated in this code snippet, the 'load' event listener is attached to the IFRAME after it's created. Upon the loading completion, the IFRAME is removed from the DOM, and a short timeout is introduced to ensure the callback is executed after the IFRAME is no longer present. This timeout buffer accounts for potential discrepancies in browser behavior.

It's worth noting that this method assumes the IFRAME's URL is within your domain. If it's a cross-site request, accessing the IFRAME's content will be restricted due to browser security measures, and alternative approaches may be necessary.

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