How to Restart a CSS3 Animation Smoothly Without Jitter?

How to Seamlessly Restart a CSS3 Animation

If you have a CSS3 animation that needs to restart upon a trigger like a click, you'll face a dilemma: continuously scaling it back and forth can lead to delays and complexity. While removing and reinserting the animated element can work, it's worth exploring a more elegant solution.

Fortunately, there's a technique using reflow that can provide a smooth reset. By temporarily disabling the animation, forcing a reflow, and then re-enabling it, you can effectively restart the animation without any delay or disruption. Here's how it works:

function reset_animation() {
  var el = document.getElementById('animated');
  el.style.animation = 'none'; // Temporarily disable animation
  el.offsetHeight; // Force reflow
  el.style.animation = null; // Re-enable animation
}

This approach leverages the behavior of browsers to recalculate the document flow (reflow) when certain properties change. By disabling and re-enabling the animation, you force the browser to re-initialize the animation properties, effectively restarting it.

Remember, this technique is not limited to jQuery or Move.js; you can use it with any CSS animation. So, the next time you need to restart a CSS animation, consider using this reflow-based method for a seamless and efficient solution.

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