您可以使用JavaScript检测设备是否具有电话功能（例如，它可以拨打语音电话/短信）吗？ [英] Can you detect whether a device has phone capabilities (e.g. it can make voice calls/SMS) with JavaScript?

问题描述

有没有办法检测移动设备是否能够拨打语音电话/短信？

Is there any way to detect whether a mobile device is capable of making voice calls / SMS messages?

这在申请电话时非常重要：和短信：网页中的链接。仅仅检测手机是不够的，因为平板电脑无法拨打电话，iTouch无法拨打电话等。

This is important when applying tel: and sms: links in a web page. It is not enough to merely detect mobile, since tablets can't make calls, iTouch can't make calls, etc.

我对移动检测黑客不感兴趣使用设备大小，UA字符串检测等。我想使用功能检测来确定设备是否能够进行语音呼叫/ SMS短信。我喜欢通用的解决方案，但我主要对iOS / Android感兴趣。

I'm not interested in mobile detection hacks using device size, UA string detection, etc. I want to use feature detection to determine if the device is capable of voice calls / SMS text messaging. I'd love a universal solution, but am mainly interested in iOS / Android.

推荐答案

我还没有看到一个明显的方式来看那个短信：和 tel：链接得到特殊待遇。

I havent seen an obvious way to see that sms: and tel: links get special treatment.

更新：下面的@janogosteve已确认目前没有可靠的功能检测。这看起来无法察觉。

Update: @janogosteve below has confirmed there is currently no reliable feature detect. This looks undetectable.

这是检查此功能检测的综合方法。 （阅读下面的jangosteve评论！）

Here's a comprehensive way to check this feature detect. (Read jangosteve comment below!)

• 制作包含其中两个链接和常规http链接的测试页


• 抓取元素，然后遍历所有属性，将其全部复制到对象..


• 还 getComputedStyle info关于它们的一堆细节并将其扔进一个对象中


• JSON.stringify （这些东西让你可以处理稍后））

• make a test page with two of those links and a regular http link
• grab the elements and then traverse all their properties, copy it all over to an object..
• also getComputedStyle info for a bunch of details on them and throw that into an object as well
• JSON.stringify( that stuff so you can deal with it later on)

在iOS设备和桌面Safari / Chrome中执行以上操作

Do the above on an iOS device and in desktop Safari/Chrome

然后 JSON.parse 他们回到对象...并使用 https://github.com/NV/objectDiff.js ，看看你是否能发现任何差异。

Then JSON.parse them back into objects... and use https://github.com/NV/objectDiff.js to see if you can spot any differences at all.

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