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Javascript Events

This is an example to explain the variations of load events.

1. onload event

<body onload="someFunction()">
<img src="image1" />
<img src="image2" />
 function someFunction() {
 console.log("Hi! I am loaded");

In this case, the message is logged once all the contents of the page including the images and stylesheets(if any) are completely loaded.


"Hi! I am loaded"

2. DOMContentLoaded event

document.addEventListener("DOMContentLoaded", function(event) {
 console.log("Hello! I am loaded");

In the above code, the message is logged only after the DOM/document is loaded


"Hello! I am loaded"

3. Self-invoking anonymous function

 console.log("Hi I am an anonymous function! I am loaded");

Here, the message gets logged as soon as the browser interprets the anonymous function. It means, this function can get executed even before the DOM is loaded.


("Hi I am an anonymous function! I am loaded"


In this page (written and validated by ) you learned about Javascript Events . What's Next? If you are interested in completing Javascript tutorial, your next topic will be learning about: Javascript Callbacks.

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