upload组件的accept属性

upload组件的accept属性

例：上传图片

 <Upload
          :on-exceeded-size="fileOverSize"
          :before-upload="beforeUpload"
          :on-format-error="formatError"
          v-model="importForm.uploadFile"
          :max-size="maxSize"
          :format="['jpg','jpeg','png']"
          action="#"
          accept="image/jpeg,image/jpg,image/png,">
          <Button
            type="primary"
            icon="ios-cloud-upload-outline">上传文件</Button>
</Upload>

accept：表示可以选择的文件MIME类型，多个MIME类型用英文逗号分开，常用的MIME类型见下表。

常用的MIME类型

后缀名       MIME名称
*.3gpp    audio/3gpp, video/3gpp
*.ac3    audio/ac3
*.asf       allpication/vnd.ms-asf
*.au           audio/basic
*.css           text/css
*.csv           text/csv
*.doc    application/msword    
*.dot    application/msword    
*.dtd    application/xml-dtd    
*.dwg    image/vnd.dwg    
*.dxf      image/vnd.dxf
*.gif            image/gif    
*.htm    text/html    
*.html    text/html    
*.jp2            image/jp2    
*.jpe       image/jpeg
*.jpeg    image/jpeg
*.jpg          image/jpeg    
*.js       text/javascript, application/javascript    
*.json    application/json    
*.mp2    audio/mpeg, video/mpeg    
*.mp3    audio/mpeg    
*.mp4    audio/mp4, video/mp4    
*.mpeg    video/mpeg    
*.mpg    video/mpeg    
*.mpp    application/vnd.ms-project    
*.ogg    application/ogg, audio/ogg    
*.pdf    application/pdf    
*.png    image/png    
*.pot    application/vnd.ms-powerpoint    
*.pps    application/vnd.ms-powerpoint    
*.ppt    application/vnd.ms-powerpoint    
*.rtf            application/rtf, text/rtf    
*.svf           image/vnd.svf    
*.tif         image/tiff    
*.tiff       image/tiff    
*.txt           text/plain    
*.wdb    application/vnd.ms-works    
*.wps    application/vnd.ms-works    
*.xhtml    application/xhtml+xml    
*.xlc      application/vnd.ms-excel    
*.xlm    application/vnd.ms-excel    
*.xls           application/vnd.ms-excel    
*.xlt      application/vnd.ms-excel    
*.xlw      application/vnd.ms-excel    
*.xml    text/xml, application/xml    
*.zip            aplication/zip                 实践补充：     .zip
*.xlsx     application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

实践补充：

1.对于zip文件类型的判断，accept属性可以接受.zip，写成
accept='.zip'
然而如果要通过文件的type字段来比较的话，应该写成
file.type === 'application/x-zip-compressed'
2.对于excel类型文件的判断，accept属性可以接受如下：
accept='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel'