input上传指定类型的⽂件1、⾕歌–上传⽂件夹
添加属性webkitdirectory
<input type = "file" webkitdirectory>
2、上传⽂件–限制类型
添加accept属性
<input type = "file" accept = "image/*">  <!-- 上传图⽚ -->
视频：video/*
⾳频：audio/*
gif图⽚：image/gif
只允许上传wav(⼀般⽤于铃声上传)：.wav
excel⽂件：application/msexcel
word⽂件：application/msword
zip⽂件：application/zip
text⽂件：text/plain
js⽂件：text/javascript，application/javascript
注意：使⽤”* “会导致⾕歌浏览器响应延迟，对IE和⽕狐没有影响
如需规定多个值，请使⽤逗号分隔。⽐如：
<input accept="image/gif,image/jpg,image/png" />
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附⽀持的⽂件类型：
html input type属性*.3gpp audio/3gpp， video/3gpp 3GPP Audio/Video
*.ac3 audio/ac3 AC3 Audio
*.asf allpication/vnd.ms-asf Advanced Streaming Format
*.au audio/basic AU Audio
*.css text/css Cascading Style Sheets
*.csv text/csv Comma Separated Values
*.doc application/msword MS Word Document
*.dot application/msword MS Word Template
*.dtd application/xml-dtd Document Type Definition
*.dwg image/vnd.dwg AutoCAD Drawing Database
*.dxf image/vnd.dxf AutoCAD Drawing Interchange Format
*.gif image/gif Graphic Interchange Format
*.htm text/html HyperText Markup Language
*.html text/html HyperText Markup Language
*.jp2 image/jp2 JPEG-2000
*.jpe image/jpeg JPEG
*.jpeg image/jpeg JPEG
*.jpg image/jpeg JPEG
*.js text/javascript， application/javascript JavaScript
*.json application/json JavaScript Object Notation
*.mp2 audio/mpeg， video/mpeg MPEG Audio/Video Stream， Layer II
*.mp3 audio/mpeg MPEG Audio Stream， Layer III
*.mp4 audio/mp4， video/mp4 MPEG-4 Audio/Video
*.mpeg video/mpeg MPEG Video Stream， Layer II
*.mpg video/mpeg MPEG Video Stream， Layer II
*.mpp application/vnd.ms-project MS Project Project
*.ogg application/ogg， audio/ogg Ogg Vorbis
*.pdf application/pdf Portable Document Format
*.png image/png Portable Network Graphics
*.pot application/vnd.ms-powerpoint MS PowerPoint Template
*.pps application/vnd.ms-powerpoint MS PowerPoint Slideshow
*.ppt application/vnd.ms-powerpoint MS PowerPoint Presentation
*.rtf application/rtf， text/rtf Rich Text Format
*.svf image/vnd.svf Simple Vector Format
*.tif image/tiff Tagged Image Format File
*.tiff image/tiff Tagged Image Format File
*.txt text/plain Plain Text
*.wdb application/vnd.ms-works MS Works Database
*.wps application/vnd.ms-works Works Text Document
*.xhtml application/xhtml+xml Extensible HyperText Markup Language
*.xlc application/vnd.ms-excel MS Excel Chart
*.xlm application/vnd.ms-excel MS Excel Macro
*.xls application/vnd.ms-excel MS Excel Spreadsheet
*.xlt application/vnd.ms-excel MS Excel Template
*.xlw application/vnd.ms-excel MS Excel Workspace
*.xml text/xml， application/xml Extensible Markup Language *.zip aplication/zip Compressed Archive

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