How to Keep an Absolutely Positioned Element Centered During CSS3 Scale Animations?

How to Maintain Center Origin During Scale Animation

When using CSS3 animations to scale an element positioned absolutely in the center of another element, the resulting animation may appear off-center. This discrepancy arises because the animation overrides the initial translation that centers the element.

To resolve this issue and ensure that the origin remains centered during the scale animation, it's crucial to:

1. Combine the transformations: Rather than overriding the initial translation, combine it with the scale transformation within the animation. This allows the element to remain centered while also scaling.
2. Specify the order correctly: Pay attention to the order of transformations. The translation must precede the scale transformation to maintain the desired alignment.

Updated Example:

@keyframes ripple_large {
  0% {
    transform: translate(-50%, -50%) scale(1);
  }
  75% {
    transform: translate(-50%, -50%) scale(3);
    opacity: 0.4;
  }
  100% {
    transform: translate(-50%, -50%) scale(4);
    opacity: 0;
  }
}

.center-point {
  transform: translate(-50%, -50%) scale(0);
}

With these modifications, the scaling animation will correctly maintain the element's center position within the parent container.

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