css实现输入框输入placeholder上浮美化效果代码-html代码-BFW代码库

css实现输入框输入placeholder上浮美化效果代码

代码语言：html

代码描述：css实现输入框输入placeholder上浮美化效果代码，输入框没有获取焦点前，placeholder正常显示，获取后placeholder上浮空出位置。

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>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <style>
        * {
      padding: 0;
      margin: 0;
      box-sizing: border-box;
    }
    body { background-color: #fff;  font-size: 62.5%; }
    div.centralize {
      height: 100vh;
      width: 100vw;
      display: flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
    }
    
    div.input-block {
      position: relative;
    
    }
    
    div.input-block input {
      font-weight: 500;
      font-size: 1.6rem;
      color: #495055;
    
      width: 350px;
      padding: 15px 15px;
      border-radius: 1rem;
      border: 2px solid  #D9D9D9;
      outline:none;
    }
    
    div.input-block span.placeholder {
      position: absolute;
      margin: 17px 0;
      padding: 0 4px;
      font-famil.........完整代码请登录后点击上方下载按钮下载查看