[repo stackoverflow]HTML Input=“file” Accept Attribute File Type

[原地址](http://stackoverflow.com/questions/11832930/html-input-file-accept-attribute-file-type-csv)

验证用户输入还是挺有用的，不过验证图片如果用通配符验证，browser调用flash打开上传文件的对话框会异常的慢，只能依靠后台验证，压缩包类型也很慢。

### Valid Accept Types:

For CSV files (.csv), use:

<input type="file" accept=".csv" />
For Excel Files 97-2003 (.xls), use:

<input type="file" accept="application/vnd.ms-excel" />
For Excel Files 2007+ (.xlsx), use:

<input type="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" />
For Text Files (.txt) use:

<input type="file" accept="text/plain" />
For Image Files (.png/.jpg/etc), use:

<input type="file" accept="image/*" />
For HTML Files (.htm,.html), use:

<input type="file" accept="text/html" />
For Video Files (.avi, .mpg, .mpeg, .mp4), use:

<input type="file" accept="video/*" />
For Audio Files (.mp3, .wav, etc), use:

<input type="file" accept="audio/*" />
For PDF Files, use:

<input type="file" accept=".pdf" /> 
DEMO:
http://jsfiddle.net/dirtyd77/LzLcZ/144/

NOTE:

If you are trying to display Excel CSV files (.csv), do NOT use:

text/csv
	application/csv
	text/comma-separated-values (works in Opera only).
If you are trying to display a particular file type (for example, a WAV or PDF), then this will almost always work...