What exactly window.onload does?What are the other alternatives of this function in js?

Question

I want to know about the alternatives of window.onload

Answer 1

Just passing off some links might worth your reads
https://stackoverflow.com/questions/20180251/when-to-use-window-onload
https://stackoverflow.com/questions/35951299/why-use-window-onload
https://stackoverflow.com/questions/559150/best-practice-for-using-window-onload