检查用户何时选择使用 javascript 打印 [英] Check for when a user has selected to print using javascript

问题描述

当用户在 Firefox 或 Internet Explorer 等浏览器上选择文件 > 打印"，或点击运行以下 javascript 的链接时

When a user chooses "File > Print" on a browser such as Firefox or Internet Explorer, or clicks on a link that runs the below javascript

window.print();

有没有办法有条件地检查这种模式并禁用一些javascript.

Is there a way to conditionally check for this mode and disable SOME javascript.

我正在尝试这样做，因为我有一个插件，它为圆形边框添加了自己的自定义标记，即使在打印特定的样式表中，我也无法覆盖这些样式，我不希望在打印时出现边框页面.

I am trying to do this because I have a plugin that adds in its own custom markup for rounded borders and even in a print specific stylesheet I can not override the styling for these, I dont want the borders to appear when printing out the page.

与插件无关，通过用于创建选项卡式用户界面的 javascript 完成了样式更改，我已经完成了打印特定的 CSS 以覆盖样式，并且在我使用时它工作正常Firefox Web 开发人员工具栏 > CSS > 按媒体类型显示 CSS > 打印.. 但是当我打印出来它不起作用时，javascript 接管并更改样式.. 如果我完全禁用 javascript 那么打印显然工作正常再次.

Unrelated to the plugin there are style changes done via javascript that is used to create a tabbed user interface and I have done print specific CSS to override the styling and it works fine when I use the Firefox web developer toolbar > CSS > Display CSS by Media type > Print.. but when I print it out it doesn't work, the javascript takes over and changes the styling.. if I disable javascript completely then the printing obviously works fine again.

谢谢

推荐答案

您可以:

window.old_print=window.print
window.print=function() {
    alert('doing things');
    window.old_print();
}

但这只会从页面 javascript 内部捕获对 print() 的调用.

but this will only catch calls to print() from inside the page javascript.

您是否尝试将 !important 放在特定于打印的样式表上?

Did you try putting !important on print-specific stylesheet?

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