如何测试浏览器是否支持< input capture />

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如何测试当前的浏览器是否支持移动浏览器的功能以使用设备相机拍照？

How could I test if the current browser support the feature of mobile browsers to use the device camera to take a picture?

Capture is basically ignored in all desktop browsers: https://caniuse.com/#feat=html-media-capture

How could I detect if I can use capture (and that it won't show an open file dialog, but will actually open the picture application)?

解决方案

You can create an input element in JS and test for the capture property. It will be undefined if unsupported.

var el = document.createElement('input')
var supported = el.capture != undefined

console.log('capture supported: '+supported)

Here's what it looks like in the iOS simulator

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如何测试浏览器是否支持&lt; input capture /&gt;