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HomeWeb Front-endCSS TutorialHow to Create a Smooth Sliding Background Color Transition with CSS?

How to Create a Smooth Sliding Background Color Transition with CSS?

Creating an Animated Background Color Slide Transition

Question:

How can I use CSS transitions to smoothly slide up the background color of an element on hover, giving the effect of scrolling the color from the bottom of the element?

Answer:

Traditional transitions for changing background color only support fading effects. To create a sliding effect, an alternative approach is required. One way is to utilize a background image or gradient and gradually adjust its position:

.box {
    width: 200px; height: 100px;
    background-size: 100% 200%;
    background-image: linear-gradient(to bottom, red 50%, black 50%);
    -webkit-transition: background-position 1s;
    -moz-transition: background-position 1s;
    transition: background-position 1s;
}

.box:hover {
    background-position: 0 -100%;
}

In this example:

  • The .box element is defined with a linear gradient that creates a horizontal red and black split.
  • By setting the initial background-position to 0 -100%, the gradient is hidden entirely.
  • On hover, the background-position is animated to 0 0, gradually revealing the gradient from the bottom.

This technique provides a smooth sliding effect for the background color change. It's worth noting that this approach works well if you want a specific background gradient or image, allowing for more customization than the standard fading transition.

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