window.onload vs document.onload

window.onload

• It is fired when the entire page loads, including its content (images, css, scripts, etc.)
• $(window).load()

document.onload

• It is fired when the DOM is ready which can be prior to images and other external content is loaded
• In general, document.onload event is fired before the window.onload
• $(document).ready()

Also Read:

1. Difference between async and defer attributes in script tags
2. Making max width work in internet explorer
3. Two column layout in css
4. Getting started with es6 iterators and iterables
5. Array filterUntil function implementation for javascript