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Why isn't my animation easing function creating a smooth transition between keyframes?

Asked on Nov 16, 2025

Answer

Animation easing functions control the speed of an animation to make transitions appear more natural. If your animation isn't transitioning smoothly, it might be due to incorrect use of easing functions or missing them entirely.

<!-- BEGIN COPY / PASTE -->
    <style>
      .box {
        width: 100px;
        height: 100px;
        background-color: blue;
        animation: move 2s ease-in-out infinite;
      }

      @keyframes move {
        0% { transform: translateX(0); }
        50% { transform: translateX(100px); }
        100% { transform: translateX(0); }
      }
    </style>

    <div class="box"></div>
    <!-- END COPY / PASTE -->

Additional Comment:

Ensure you are using a valid easing function like "ease", "ease-in", "ease-out", or "ease-in-out".
Check that the easing function is applied to the correct animation property.
Consider using custom cubic-bezier functions for more control over the easing effect.
Verify that keyframes are defined correctly and cover the full range of the animation.

✅ Answered with CSS best practices.

Ask any question about CSS here... and get an instant response.

Why isn't my animation easing function creating a smooth transition between keyframes?

Asked on Nov 16, 2025

Answer

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