JavaScript - How to take variable that defined inside onload function outside?

Question

I want to get all input element in html page. I\'ve tried this:

window.onload = function(){
    input = document.querySelectorAll(\"input\");
}

Answer 1

There are a couple ways of doing it.

The Dangerous Way

var input; // Input declared outside
window.onload = function(){
    input = document.querySelectorAll("input");
}
// Sometime later...
alert(input.length);

This assumes that Sometime later... magically happens after window.onload was fired, which may or may not be the case, you have no guarantee.

The Hacky Way

You can make sure all of your