How to play a GIF on click (like 9GaG.com) with wo

问题:

I need to implement this "gif player" in a wordpress site, because gif pages are up to 6mb, so performance is really crappy

I´ve read this Onclick play GIF image with jQuery and start from beginning also this How to play animated GIF from the beginning onclick function that were almost a solution but i dont know how this should be done with wordpress in every entry

9gag.com does it perfectly; shows a preview image , reproduces the gif onclick, and stop the gif if its clicked again. If clicked again, plays the gif from the start again

How can i accomplish this with wordpress?

回答1:

What 9GAG essentially did was it had two images - one was the animated GIF, and the other was a still JPG.

Before you clicked on it, it showed the JPG file. After you clicked on it, it loaded the GIF into the same <img> tag, and made you think it "played" the GIF image.

If you click on it again, it loads the JPG file back into the <img> tag, and made you think it "paused" the GIF image.

Image manipulation, like only using one GIF and pausing and playing it is far, far too difficult to be of practical use - this method is one of the better ways to do it.

Here's some code:

<div id="gifdiv">
  <img src="staticgif.jpg" />
</div>
<script type="text/javascript">
  $("#gifdiv").click(function () {
    if ($(this).find("img").attr("data-state") == "static") {
      $(this).find("img").attr("src", "animatedgif.gif");
    } else {
      $(this).find("img").attr("src", "staticgif.jpg");
    }
  });
</script>

Also, if you wish for speed, I think 9GAG does it by preloading the GIF beforehand, like this:

<script type="text/javascript">
  (new Image()).src = "animatedgif.gif"; // this would preload the GIF, so future loads will be instantaneous
</script>

Hope this helps.

回答2:

If you don't want to pause, you can easily REPLAY the gif file. Just trigger on the click and reload the gif into the image tag.

your_image= document.getElementById or however you want to grab the reference to the image. then set an event listener for the click.

Then your_image.src= your_image.src; And the gif will run again.