Question 209418 in Html Question posted in
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Html – How do i make the border animation following border radius?

I want the border animation to follow the border-radius of div. However, the animation doesn’t follow the border radius.

.container {
  height: 150px;
  width: 150px;
  border: 1px solid black;
  border-radius: 20px;
  background: yellow;
  border-image: conic-gradient(from var(--angle), var(--c2), var(--c1) 0.1turn, var(--c1) 0.15turn, var(--c2) 0.25turn) 30;
  animation: borderRotate var(--d) linear infinite forwards;
}

@keyframes borderRotate {
  100% {
    --angle: 420deg;
  }
}

@property --angle {
  syntax: '<angle>';
  initial-value: 90deg;
  inherits: true;
}

 :root {
  --d: 2500ms;
  --angle: 90deg;
  --c1: red;
  --c2: blue;
}
<div class="container"></div>

How do i achieve the animation with border radius ?

Tags:

2

Answers


  1. 0

    You can try this border animation.

    body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

*, *::before, *::after {
    box-sizing: border-box;
}

@keyframes rotate {
    100% {
        transform: rotate(1turn);
    }
}

.container {
    position: relative;
    z-index: 0;
    width: 300px;
    height: 300px;
    border-radius: 10px;
    overflow: hidden;
    padding: 2rem;
}   
.container::before {
        content: '';
        position: absolute;
        z-index: -2;
        left: -50%;
        top: -50%;
        width: 200%;
        height: 200%;
        background-color: blue;
        background-repeat: no-repeat;
        background-size: 50% 50%, 50% 50%;
        background-position: 0 0, 100% 0, 100% 100%, 0 100%;
        background-image: linear-gradient(red, maroon);
        animation: rotate 4s linear infinite;
}
    
.container::after {
        content: '';
        position: absolute;
        z-index: -1;
        left: 6px;
        top: 6px;
        width: calc(100% - 12px);
        height: calc(100% - 12px);
        background: white;
        border-radius: 5px;
}
    <div class="container">Content Here</div>
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  2. 0

    Is this what you are trying to achieve? Using pseudo elements, you offset the ::before element by 50% while also making it 200% of its original size. Then overlay an ::after pseudo element.

    body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

@keyframes rotate {
  100% {
    transform: rotate(1turn);
  }
}

.container {
  position: relative;
  z-index: 0;
  width: 130px;
  height: 130px;
  border-radius: 20px;
  padding: 10px;
  overflow: hidden;
}

.container::before {
  content: '';
  position: absolute;
  z-index: -2;
  left: -50%;
  top: -50%;
  width: 200%;
  height: 200%;
  background-image: conic-gradient(red, yellow, green, blue, black);
  animation: rotate 4s linear infinite;
}

.container::after {
  content: '';
  position: absolute;
  z-index: -1;
  left: 5px;
  top: 5px;
  width: calc(100% - 10px);
  height: calc(100% - 10px);
  background: yellow;
  border-radius: 15px;
}
    <div class="container"></div>
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