打印 <div id="printarea"></div>只要?

2022-01-30 00:00:00 printing javascript css dhtml

如何打印指定的 div(无需手动禁用页面上的所有其他内容)?

How do I print the indicated div (without manually disabling all other content on the page)?

我想避免一个新的预览对话框，所以用这个内容创建一个新窗口是没有用的.

I want to avoid a new preview dialog, so creating a new window with this content is not useful.

该页面包含几个表格，其中一个包含我要打印的 div - 该表格的样式是 Web 的视觉样式，不应在打印中显示.

The page contains a couple of tables, one of them contains the div I want to print - the table is styled with visual styles for the web, that should not show in print.

推荐答案

这是一个通用的解决方案，使用 CSS only，我已经验证可以工作.

Here is a general solution, using CSS only, which I have verified to work.

@media print {
  body * {
    visibility: hidden;
  }
  #section-to-print, #section-to-print * {
    visibility: visible;
  }
  #section-to-print {
    position: absolute;
    left: 0;
    top: 0;
  }
}

替代方法不是很好.使用 display 很棘手，因为如果任何元素有 display:none 那么它的后代都不会显示.要使用它，您必须更改页面结构.

Alternative approaches aren't so good. Using display is tricky because if any element has display:none then none of its descendants will display either. To use it, you have to change the structure of your page.

使用 visibility 效果更好，因为您可以打开后代的可见性.不可见的元素仍然会影响布局，所以我将 section-to-print 移动到左上角以便正确打印.

Using visibility works better since you can turn on visibility for descendants. The invisible elements still affect the layout though, so I move section-to-print to the top left so it prints properly.

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