是否可以阻止用户截取网页截图?

cssweb developmentfront end technology更新于 2024/10/31 22:36:17

在浏览网页时，用户可能需要截取某些内容以便向他人展示，但有时网页上可能包含敏感信息，开发人员可能不希望用户截取。

用户可以同时按下功能键、Windows 键和空格键来截取屏幕截图。在 MacOS 中，我们必须使用 Command、Shift 和 3 键来截取屏幕截图。

在本文中，我们将了解如何阻止用户截取网页截图。

如何阻止用户截取屏幕截图?

截取屏幕截图的命令无法禁用，因为它们是内置功能，由操作系统控制。我们可以使用 HTML、CSS 和 JavaScript，但仍然无法阻止用户截取屏幕截图。阻止用户截取屏幕截图是一项艰巨的任务，因为用户可以复制粘贴网站内容，也可以使用某些第三方软件进行截取。

然而，我们可以使用一些方法在一定程度上阻止用户截取网页屏幕截图。

示例

在下面的示例中，我们插入了一些文本，然后将其括在一个 div 中，再将其添加到 CSS 部分中。之后，我们使用媒体查询并将显示设置为 None。这样，用户可以看到内容，但无法打印屏幕截图。

<!DOCTYPE html>
<html lang="en">
<head>
   <title>Example of disabling the printing </title>
   <style>
      @media print {
         html,
         body {
            display: none;
         }
      }
   </style>
</head>
<body>
   <div>
      Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been
      the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type
      and scrambled it to make a type specimen book. It has survived not only five centuries, but also the 
      leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with
      the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
      publishing software like Aldus PageMaker including versions of Lorem Ipsum.
   </div>
</body>
</html>

示例

在下一个示例中，我们将通过在屏幕上显示一条消息来警告用户不要复制或截取网页内容。

<!DOCTYPE html>
<html lang="en">
<head>
   <title>Example of disabling the printing </title>
   <style>
      html {
         user-select: none;
      }
   </style>
</head>
<body>
   <div>
      Lorem Ipsum is simply dummy text of the printing and typesetting industry.
      Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, 
      when an unknown printer took a galley of type and scrambled it to make a type specimen book.
      It has survived not only five centuries, but also the leap into electronic typesetting,
      remaining essentially unchanged. It was popularised in the 1960s with the release of
      Letraset sheets containing Lorem Ipsum passages, and more recently with desktop 
      publishing software like Aldus PageMaker including versions of Lorem Ipsum.
   </div>
</body>
</html>

在上面的代码中，我们使用了与上一个示例相同的段落，这次在 CSS 部分中，我们使用了 user-select 属性并将其值设置为 none。现在，用户将能够看到屏幕上的内容，但无法选择它。输出如下

示例

在下一个示例中，我们将通过在屏幕上显示一条消息来警告用户不要复制或截取网页内容。

<!DOCTYPE html>
<html lang="en">
<head>
   <title>Example of printing a warning message to the user </title>
   <script>
      alert("Please!! do not try to take any kinds of screenshot of the content");
   </script>
</head>
<body>
   <div>
      Lorem Ipsum is simply dummy text of the printing and typesetting industry.
      Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, 
      when an unknown printer took a galley of type and scrambled it to make a type 
      specimen book. It has survived not only five centuries, but also the leap into 
      electronic typesetting, remaining essentially unchanged. It was popularised in 
      the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, 
      and more recently with desktop publishing software like Aldus PageMaker 
      including versions of Lorem Ipsum.
   </div>
</body>
</html>

在上面的代码中，我们再次使用了相同的段落，并使用了一行 JavaScript 代码，当用户尝试截取网页截图时，它会向用户发出警告。