背景变色

hover me to change
<div class="button"><span>hover me to change</span></div>
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.button {
  margin: 40px auto;
  width: 200px;
  height: 60px;
  padding: 0 30px;
  line-height: 60px;
  text-align: center;
  position: relative;
  appearance: none;
  background: #f72359;
  border: none;
  color: white;
  font-size: 1.2em;
  cursor: pointer;
  outline: none;
  overflow: hidden;
  border-radius: 100px;
}

.button span {
  position: relative;
}

.button::before {
  --size: 0;
  content: '';
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--size);
  height: var(--size);
  background: radial-gradient(circle closest-side, #4405f7, transparent);
  transform: translate(-50%, -50%);
  transition: width 0.2s ease, height 0.2s ease;
}

.button:hover::before {
  --size: 400px;
}
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document.querySelector('.button').addEventListener('mousemove', function (e) {
  const x = e.pageX - this.offsetLeft;
  const y = e.pageY - this.offsetTop;

  this.style.setProperty('--x', `${x}px`);
  this.style.setProperty('--y', `${y}px`);
});
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边框动画

hover me to change
<div class="button">
  <div class="button__content">hover me to change</div>
</div>
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.btn-container {
  padding: 10px;
  .button {
    width: 200px;
    height: 60px;
    position: relative;
    background: #fff;
    margin: 30px auto;
    box-sizing: border-box;
    cursor: pointer;
    text-align: center;
    line-height: 60px;
    &::before {
      content: '';
      width: 0;
      height: 0;
      background: #00adb5;
      position: absolute;
      top: -1px;
      right: -1px;
      z-index: 0;
      transition: width 0.5s, height 0.5s;
    }
    &::after {
      content: '';
      width: 0;
      height: 0;
      background: #00adb5;
      position: absolute;
      bottom: -1px;
      left: -1px;
      z-index: 0;
      transition: width 0.5s, height 0.5s;
    }
    &:hover::before {
      width: calc(100% + 2px);
      height: calc(100% + 2px);
    }
    &:hover::after {
      width: calc(100% + 2px);
      height: calc(100% + 2px);
    }

    .button__content {
      height: 100%;
      width: 100%;
      position: absolute;
      left: 0;
      top: 0;
      z-index: 1;
      background: #fff;
    }
  }
}
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Last Updated:
Contributors: leevare