用法

flex 属性定义子项目分配剩余空间， 用flex 来表示占多少 份数。

  1. .item {
  2.   felx: <number>;/* default 0*/
  3. }

例子

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

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>

  <style>
    div {
      display: flex;
      width: 60%;
      height: 150px;
      background-color: blue;
    }

    div span {
      flex: 1;
      background-color: red;
      margin: 10px;
    }

    p {
      display: flex;
      width: 60%;
      height: 150px;
      background-color: blue;
    }

    p span {
      flex: 1;
      background-color: red;
      margin: 10px;
    }

    p span:nth-child(2) {
      flex: 2;
    }
  </style>
</head>

<body>
  <div>
    <span>1</span>
    <span>1</span>
    <span>1</span>
    <span>1</span>
  </div>

  <p>
    <span>1</span>
    <span>1</span>
    <span>1</span>
    <span>1</span>
  </p>
</body>

</html>

image.png