When to use “[removed]”?

Question

In JavaScript, when I want to run a script once when the page has loaded, should I use window.onload or just write the script?

For example, if I want to

Answer 1

You have three alternatives:

1. Directly inside the script tag runs it as soon as it is parsed.

2. Inside document.addEventListener( "DOMContentLoaded", function(){}); will run it once the DOM is ready.

3. Inside window.onload function(){}) will run as soon as all page resources are loaded.