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. Passing arguments from one function to another in javascript
2. Difference between async and defer attributes in script tags
3. Pure vs Impure functions
4. css specificity interview question
5. JavaScript Promises - Visualized