直接限制input type='file'的文件类型限制,通过accept属性进行设定,多个类型用逗号分隔开,因为accept是html5的新特性,所以IE的支持就显得单薄了
效果展示:如:
<!DOCTYPE html>
<html>
<head><meta name="viewport" content="width=device-width, initial-scale=1" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>input type=file 文件上传时后缀限定示例_何问起</title><base target="_blank" />
<meta charset="utf-8" />
<style>a{color:blue}</style>
</head>
<body>
<div style="max-width:600px;margin:0px auto;">
<h2>input type=file 文件上传时后缀限定示例</h2>
<form>
限定为图片:<input type=file accept="image/*" id="hovertree" />
<hr />
限定为png或者jpg图片:<input type="file" accept="image/png,image/jpeg" id="keleyi" />
<hr />
使用js限定文件格式为gif:<input type="file" id="hovertreescj" />
</form>
<br />
<a href="http://hovertree.com">首页</a> <a href="http://hovertree.com/h/bjaf/h1fenrfm.htm">代码说明</a> <a href="http://hovertree.com/texiao/">更多特效</a>
</div>
<script>
document.getElementById("hovertreescj").accept = "image/gif";
document.write(document.getElementById("hovertreescj").accept);
</script>
</body>
</html>
*.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 |
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 |