检查用户系统是否可以看到特定的表情符号？
有没有办法用javascript检测用户是否可以看到某个表情符号？
我的 mac 上有很多表情符号，但我的同事在她的上看不到，因为她的 mac 操作系统似乎版本较旧。我认为使用其他操作系统的人也会发生类似的事情等等。
例如，当我输出椒盐卷饼表情符号时：
Is there a way to detect with javascript, whether a user can see a certain emoji?
There are quite a few emojis on my mac, that my colleague can't see on hers, because she seems to have an older version of mac OS. I assume that similar things can happen with people who use other OS's altogether etc.
For examples, when I output the pretzel emoji: ???? ...my colleague just sees a three black stripes instead.
Is there a way for me to show the emoji whenever the user has it, but hide it (or show something different) whenever the end user isn't able to see it?
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我之前在一个项目中使用过 Modernizr 来解决这个问题。 https://modernizr.com/
如果它们本身不支持表情符号，您始终可以使用开源表情符号库以防止将来发生这种情况。 https://github.com/MorbZ/OpenSansEmoji
I've used Modernizr in a project before for this very problem. https://modernizr.com/
If they don't support emoji's natively you could always use an open source emoji library to prevent this from happening in the future. https://github.com/MorbZ/OpenSansEmoji