# 按钮悬停效果

# 快速导航

# 示例效果

# 背景变色

hover背景渐变
<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 .2s ease, height .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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hoverBg
<style scoped lang="scss">
  .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 .2s ease, height .2s ease;
  }

  .button:hover::before {
    --size: 400px;
  }
</style>

<template>
  <div>
    <div class="button"><span>hover背景渐变</span>
    </div>
  </div>
</template>

<script>
  export default {
    name: 'hoverBg',
    data() {
      return {}
    },
    mounted() {
      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`)
      })
    }
  }
</script>

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# 边框动画

边框动画
 <div class="button">
   <div class="button__content">边框动画</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 .5s,height .5s;
    }
    &::after{
      content:'';
      width:0;
      height:0;
      background:  #00adb5;
      position: absolute;
      bottom:-1px;left:-1px;
      z-index: 0;
      transition: width .5s,height .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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边框动画
<style scoped lang="scss">
.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 .5s,height .5s;
    }
    &::after{
      content:'';
      width:0;
      height:0;
      background:  #00adb5;
      position: absolute;
      bottom:-1px;left:-1px;
      z-index: 0;
      transition: width .5s,height .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;
    }
  }
}
</style>

<template>
  <div class="btn-container">
    <div class="button">
      <div class="button__content">边框动画</div>
    </div>
  </div>
</template>

<script>
  export default {
    name: 'hoverBorder',
    data() {
      return {}
    }
  }
</script>

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白色

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