title: Typescript compile error: Property 'classList' does not exist on type 'Node'
body: <p>Windows 7 x64</p>
  
  <p>Compiling using gulp-typescript 2.7.7 using typescript 1.5 beta</p>
  
  <p>Getting error: Property 'classList' does not exist on type 'Node' because of statement
  <code>document.getElementsByClassName('left-aside-wrapper')[0].classList.toggle('isOpen');
  </code></p>
  
  <p>I see that classList is defined in the lib.d.ts file as
  <code>
  interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode {
      classList: DOMTokenList;
  </code></p>
  
  <p>Not all that familiar with how d.ts files work so is this my error or is it a bug in the d.ts file that need to be reported?</p>