Menu
Which is more widely supported: window.onload or document.onload?
574
The general idea is that window. onload fires when the document's window is ready for presentation and document. onload fires when the DOM tree (built from the markup code within the document) is completed.
The onload event occurs when an object has been loaded. onload is most often used within the <body> element to execute a script once a web page has completely loaded all content (including images, script files, CSS files, etc.).
In simpler words, we can say that the window onload event is triggered whenever a web page is launched successfully. Onload event is used with to run a script once its substance (which includes CSS files, images, and scripts) of the page is triggered completely. However, you do not always need a tag.
load() event is that the code included inside onload function will run once the entire page(images, iframes, stylesheets,etc) are loaded whereas the $(document). ready() event fires before all images,iframes etc.
window.onload
In some browsers it now takes over the role of document.onload and fires when the DOM is ready as well.
document.onload
window.onload appears to be the most widely supported. In fact, some of the most modern browsers have in a sense replaced document.onload with window.onload.
Browser support issues are most likely the reason why many people are starting to use libraries such as jQuery to handle the checking for the document being ready, like so:
$(document).ready(function() { /* code here */ }); $(function() { /* code here */ }); For the purpose of history. window.onload vs body.onload:
A similar question was asked on codingforums a while back regarding the usage of
window.onloadoverbody.onload. The result seemed to be that you should usewindow.onloadbecause it is good to separate your structure from the action.
148
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
