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JS Bin// source http://jsbin.com/naguhi / file upload preview
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://code.jquery.com/jquery-1.11.3.js"></script> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| <style> | |
| #container > img { | |
| width: 200px; | |
| height: 200px; | |
| } | |
| </style> | |
| <script> | |
| function sendFile(option, cb) { | |
| /* { | |
| field: name, | |
| url : '/path/to/upload', | |
| file : FileObject | |
| } */ | |
| var field = option.field, | |
| xhr = new XMLHttpRequest(), | |
| fd = new FormData(), | |
| resp; | |
| xhr.open("POST", option.url, true); | |
| xhr.onreadystatechange = function () { | |
| if (xhr.readyState == 4 && xhr.status == 200) { | |
| // Handle response. | |
| resp = JSON.parse(xhr.responseText); | |
| cb && cb(resp); | |
| } | |
| }; | |
| xhr.addEventListener('load', function () { | |
| resp = JSON.parse(xhr.responseText); | |
| //cb(resp); | |
| }, false); | |
| // send multiple files; | |
| //var files = Array.apply(null,option.file); | |
| //files.forEach(function(item) { | |
| // fd.append(field, item, item.name); | |
| //}) | |
| fd.append(field, option.file); | |
| // Initiate a multipart/form-data upload | |
| xhr.send(fd); | |
| } | |
| $(function() { | |
| function readURL(file) { | |
| console.log(typeof file); | |
| var reader = new FileReader(); | |
| reader.onload = function(e) { | |
| $('#container').append('<img src="' + e.target.result+ '">') | |
| } | |
| reader.readAsDataURL(file); | |
| } | |
| $('#prefiles').on('change', function(ev) { | |
| var $that = $(this), | |
| files = Array.apply(null, this.files); | |
| $.each(files, function(i, file) { | |
| readURL(file); | |
| }) | |
| }) | |
| }) | |
| </script> | |
| </head> | |
| <body> | |
| <input type="file" name="prefiles" id="prefiles" multiple> | |
| <div id="container"> | |
| </div> | |
| </body> | |
| </html> |
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