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Selected Reading
Perform Animation on CSS border-bottom-left-radius property
The CSS border-bottom-left-radius property can be animated to create smooth transitions between different radius values. This is useful for creating dynamic corner effects and interactive UI elements.
Syntax
selector {
border-bottom-left-radius: value;
animation: animation-name duration timing-function iteration-count;
}
@keyframes animation-name {
from { border-bottom-left-radius: initial-value; }
to { border-bottom-left-radius: final-value; }
}
Example: Animating Border Bottom Left Radius
The following example demonstrates how to animate the border-bottom-left-radius property from 150px to 50px and back −
<!DOCTYPE html>
<html>
<head>
<style>
.animated-box {
width: 300px;
height: 200px;
background-color: #ffeb3b;
border: 8px solid #4caf50;
border-bottom-left-radius: 150px;
animation: radiusAnimation 3s infinite alternate;
margin: 50px auto;
display: flex;
align-items: center;
justify-content: center;
font-family: Arial, sans-serif;
color: #333;
}
@keyframes radiusAnimation {
0% {
border-bottom-left-radius: 150px;
}
50% {
border-bottom-left-radius: 50px;
}
100% {
border-bottom-left-radius: 10px;
}
}
</style>
</head>
<body>
<h2>Animated Border Bottom Left Radius</h2>
<div class="animated-box">Watch the corner!</div>
</body>
</html>
A yellow box with green border appears, where the bottom-left corner smoothly animates from a large rounded curve (150px) to a smaller curve (50px) to almost square (10px) and back, creating a continuous pulsing effect on the corner radius.
Key Points
- Use
animationproperty to control duration, timing, and repetition - The
@keyframesrule defines the animation sequence - The
alternatevalue makes the animation reverse on each cycle - Only the bottom-left corner is affected, other corners remain unchanged
Conclusion
Animating the border-bottom-left-radius property creates smooth corner transitions that can enhance user interfaces. Use keyframes to define multiple animation stages for more complex effects.
Updated on: 2026-03-15T13:15:39+05:30
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