What are the loading events of iframe?

The loading events of iframe include onload event, onreadystatechange event, onbeforeunload event, onerror event, onabort event, etc. Detailed description: 1. onload event, specifying the JavaScript code to be executed after loading the iframe; 2. onreadystatechange event, specifying the JavaScript code to be executed when the iframe state changes, etc.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

iframe is a tag in HTML that is used to embed an HTML document within another HTML document. By using iframes, content from other web pages can be displayed within a web page. There are several different events that can be triggered when an iframe is loading. Some common iframe loading events are introduced below.

1. onload event: triggered when the iframe is loaded. You can specify the JavaScript code to be executed after loading is completed by adding the onload attribute to the iframe tag. For example:

<iframe src="example.html" onload="myFunction()"></iframe>

2. onreadystatechange event: triggered when the state of the iframe changes. You can specify the JavaScript code to be executed when the state changes by adding the onreadystatechange attribute to the iframe tag. For example:

<iframe src="example.html" onreadystatechange="myFunction()"></iframe>

3. onbeforeunload event: triggered when the user leaves the current page or reloads the page. You can specify JavaScript code to be executed before the user leaves the page by adding the onbeforeunload attribute to the iframe tag. For example:

<iframe src="example.html" onbeforeunload="myFunction()"></iframe>

4. onerror event: triggered when the iframe fails to load. You can specify the JavaScript code to be executed when loading fails by adding the onerror attribute to the iframe tag. For example:

<iframe src="example.html" onerror="myFunction()"></iframe>

5. onabort event: triggered when iframe loading is aborted. You can specify JavaScript code to be executed when loading is aborted by adding the onabort attribute to the iframe tag. For example:

<iframe src="example.html" onabort="myFunction()"></iframe>

These are some common iframe loading events. You can choose the appropriate event to perform the corresponding operation according to specific needs. By using these events, a more flexible and interactive iframe loading experience can be achieved.

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