Navigator.canShare

这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

如果对Navigator.share() 的调用成功，则Web Share API的Navigator.canShare()方法将返回true。

语法

var canShare = navigator.canShare(data);

Boolean值. Navigator.share()若返回True则表示内容可以被成功分享。

Specification	Status	Comment
Web Share API - Level 2 canShare	Draft	Initial definition.

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`canShare` ExperimentalNon-standard	Chrome No support No	Edge No support No	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support 75	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 11.0

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.: Non-standard. Expect poor cross-browser support.