确定浏览器是否支持打印 [英] Determine whether browser supports printing

问题描述

我认为这个问题的答案几乎肯定是不，因为我已经做了一些测试和周围搜索，但没有任何诀窍，以检测是否 window.print（）连的可能的从页面内工作（即从JavaScript）？我知道，即使在台式机/笔记本它永远不会成为可能知道是否有系统上配置的打印机，例如，但至少浏览器会提出了一个打印对话框。

I think the answer to this is almost certainly "no", because I've done a little testing and searching around, but is there any trick to detect whether window.print() even might work from inside a page (i.e., from JavaScript)? I know that even on a desktop/laptop it's never going to be possible to know whether there's a printer configured on the system, for example, but at least the browser will put up a print dialog.

我的Andr​​oid手机有一个 window.print（）的功能，但它（不出所料）不会做任何事情。

My Android phone has a window.print() function but it (unsurprisingly) doesn't do anything.

再次声明，我问大多所以有在等话题一个很好的问题： - ）

Again I'm asking mostly so there's a good question on the topic at SO :-)

推荐答案

不幸的是，它看起来像一个没有。所述window.print（）函数不是EMCAScript规范的一部分。这意味着'; S不需要为它是JavaScript语言的一部分，它的实施没有适当的文件。这是不确定的行为，所以测试它看起来非常困难的。

Unfortunately it looks like a no. The window.print() function is not part of the EMCAScript specification. This means that there';s no requirement for it to be part of the JavaScript language, and no proper documentation for its implementation. It's undefined behaviour and so testing for it looks very difficult.

来源：

• https://developer.mozilla.org/en/DOM/window.print


• HTTP：//www.ecma-international。组织/出版物/文件/ ECMA-ST / ECMA-262.pdf

• https://developer.mozilla.org/en/DOM/window.print
• http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf

编辑：

可爱的小剧本我写测试我的浏览器，只检查打印功能的存在，然后询问打印：

Cute little script I wrote to test my browsers, just checks the print function exists and then asks to print:

if(window.print) {
    if(confirm('I can print. Would you like to?'))
        window.print()
}

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