title: Javascript : Preload loading image
body: <p>I'm having trouble when displaying my loader in Javascript. Indeed, I have a lot of <strong>heavy videos</strong> in my assets folders, and when I load my page in Javascript, my image loader is showing only after a few seconds, whereas i would like it to be loaded first.</p>
  
  <p>Is there a way to preload it, before all my video assets ? </p>
  
  <p>Thanks a lot by advance ! </p>