浏览器自带打印调用以及样式修改与调试

1. 代码

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

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>print</title>
</head>

<body>
  <style>
    .border {
      border: 1px solid red;
    }
    .box1 {
      width: 300px;
      height: 400px;
      background: red;
    }
    .box2 {
      width: 300px;
      height: 400px;
      border: 1px solid blue;
    }

    @media print {
      .box2 {
        display: none;
      }
      .box1 {
        /* 无效果 */
        background-color: aqua;
        border-color: blueviolet;
      }
      .print-button {
        display: none;
      }
    }
  </style>
  <div class="box1 border">
    box1 打印显示
  </div>
  <div class="box2">
    box2 打印隐藏
  </div>
  <button onclick="printDocument()" class="print-button">打印整个文档</button>

  <script>
    function printDocument () {
      window.print()
    }
  </script>
</body>

</html>