css+js实现元素高度变化过渡动画效果代码-html代码-BFW代码库

css+js实现元素高度变化过渡动画效果代码

代码语言：html

所属分类：动画

代码描述：css+js实现元素高度变化过渡动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  

  
  
<style>
body {
  background: #4e4e4f;
  padding: 0;
  margin: 0;
  font-family: Arial, sans-serif;
  color: white;
}

h1 {
  font-weight: 300;
  font-size: 20px;
  color: black;
  position: absolute;
  left: 50%;
  top: 30px;
  transform: translateX(-50%);
}

.modal {
  width: calc(100vw - 40px);
  max-width: 300px;
  background: #181818;
  position: absolute;
  padding: 20px;
  border-radius: 8px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.075), 0 2px 2px rgba(0, 0, 0, 0.075), 0 4px 4px rgba(0, 0, 0, 0.075), 0 8px 8px rgba(0, 0, 0, 0.075), 0 16px 16px rgba(0, 0, 0, 0.075);
}

.grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr;
  grid-auto-flow: row dense;
}

.box {
  background: #292929;
  height: 20px;
  border-radius: 8px;
  animation: fade-in 300ms ease;
  transform-origin: left;
}

.box1 {
  background: #ffa502;
}

.box2 {
  background: #ea2027;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: scaleX(0.5);
  }
  to {
    opacity: 1;
  }
}
</style>

</head>

<body>
  <h1>click to shuffle</h1>
<div class="modal">
  <div class="grid"></div>
</div>

  
      <script  >
// auto height

function autoHeightTransition(element, heightTransition) {
  const observer = new MutationObserver(() => {
    // remove height and transition
    element.style.transition = "";
    element.style.height = "";

    requestAnimationFrame(() => {
      // measure new height
      const newHeight = element.scro.........完整代码请登录后点击上方下载按钮下载查看