Uncaught TypeError: Cannot read property 'getElementsByTagName' of null

Question

I\'m trying to select elements with .getElementsByTagName().

var tags = document.body.getElementsByTagName(\"*\");

Current attemp

Answer 1

Function examples:

• Page loaded with pure JavaScript

• Page loaded with jQuery

Example with both methods:

function init() {
  alert("hello javascript");
};

window.addEventListener("load",init,false);

$(document).ready(function () {
  alert("hello jQuery");
});

http://jsfiddle.net/Ln5zu4Lt/

Be careful, the JavaScript example above waits for page load (images, iframes, etc.). This takes more time than jQuery's ready.