title: How can I force images to decode on load?
body: <p>I'm building a site that does parallax scrolling with requestAnimationFrame. There are multiple sections, each with a full-sized background image and some mid- and foreground images as well. I've managed to get this animating relatively smoothly via requestAnimationFrame, but there are still occasional jitters in the animation. </p>
  
  <p>By watching Chrome's timeline in Frame mode, I can see that the processes that are causing the "jank" are labeled "Image Decode." Furthermore, the jank does not recur once the animation has been completed once. </p>
  
  <p>It seems that most browsers are now deferring the decoding of images not yet in view. Is there a way I can pre-decode (not just preload) the images without them being visible to the user?</p>