標籤：lsp type=file 方法 idt append contain tab rip http
Snandy
兩種方式實現
| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 | <!DOCTYPE HTML><html> <head> <meta charset="utf-8"> <title>html5 圖片上傳預覽</title> <style> #preview { width: 300px; height: 300px; overflow: hidden; } #preview img { width: 100%; height: 100%; } </style> <script src="../jquery/jquery-1.8.3.js"></script> <script type="text/javascript"> function preview1(file) { var img = new Image(), url = img.src = URL.createObjectURL(file) var $img = $(img) img.onload = function() { URL.revokeObjectURL(url) $(‘#preview‘).empty().append($img) } } function preview2(file) { var reader = new FileReader() reader.onload = function(e) { var $img = $(‘<img>‘).attr("src", e.target.result) $(‘#preview‘).empty().append($img) } reader.readAsDataURL(file) } $(function() { $(‘[type=file]‘).change(function(e) { var file = e.target.files[0] preview1(file) }) }) </script></head><body><form enctype="multipart/form-data" action="" method="post"> <input type="file" name="imageUpload"/> <div id="preview" style="width: 300px;height:300px;border:1px solid gray;"></div></form></body></html> |
URL.revokeObjectURL方法Opera不支援，FileReader除IE9及以下不支援，其它瀏覽器都支援。
相關：
https://developer.mozilla.org/en-US/docs/DOM/window.URL.createObjectURL
https://developer.mozilla.org/en-US/docs/DOM/window.URL.revokeObjectURL
HTML5圖片預覽
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