How to Effectively Restart a CSS3 Animation?

Restoring CSS3 Animation Effectively

Restarting a CSS3 animation can be a challenging task. This question examines a situation where a bar is animated using the scaleY(0) transform to depict time left, and the need arises to reset the animation to scaleY(1) before resuming it to scaleY(0).

While initially attempting to reset the animation by setting scaleY(1) proved ineffective, the question presents an interesting solution of removing and reinserting a clone of the animated element to restart the animation. However, this method may not be the most efficient or straightforward approach.

Instead of relying on element removal and reinsertion, a more practical solution is to utilize the reflow technique. This technique involves temporarily removing the animation style, triggering a reflow to apply the change, and then resetting the animation style. By incorporating the following JavaScript function into the code:

function reset_animation() {
  var el = document.getElementById('animated');
  el.style.animation = 'none';
  el.offsetHeight; /* trigger reflow */
  el.style.animation = null;
}

then triggering this function on an event (such as a button click), the animation can be effectively reset. This approach provides a simple and efficient method for restarting CSS3 animations.

The above is the detailed content of How to Effectively Restart a CSS3 Animation?. For more information, please follow other related articles on the PHP Chinese website!