Highlight all DOM elements with a color so it's easy see an overview of the elements at quick glance

highlight_dom_elements.js

var elements = document.querySelectorAll('*');
Array.prototype.slice.call(elements).forEach(function (element) { 
  var rgba = [Math.floor(Math.random()*256), Math.floor(Math.random()*256), Math.floor(Math.random()*256), 0.1]; 
  element.style.background = 'none';
  element.style.backgroundColor = 'rgba(' + rgba.join(',') + ')';
});