为什么 HTML `<input type="“file”"> 如果我只想 select MP3，`accept property`audio/mpeg` 和 `audio/mp3` 的工作方式相同吗？

Question

Please see these two minimum examples

audio/mpeg

 <input type="file" accept="audio/mpeg">

audio/mp3

 <input type="file" accept="audio/mp3">

Both examples can select the only MP3, why is this happening?

If I want to force my user to just select an MP3 file, which code snippet should I use?

Which one is the best?

Answer 1

An MP3 is just the audio portion of a MPEG file, so specifying audio/mpeg is equivalent to specifying audio/mp3 .

More info about media formats can be found in this article on MDN.