jQuery grab a file uploaded with input type='file'

Question

I want to grab the file uploaded in a <input type='file'> tag.

When I do $('#inputId').val(), it only grabs the name of the file, not the actual file itself.

I'm trying to follow this:

http://hacks.mozilla.org/2011/03/the-shortest-image-uploader-ever/

function upload(file) {

  // file is from a <input> tag or from Drag'n Drop
  // Is the file an image?

  if (!file || !file.type.match(/image.*/)) return;

  // It is!
  // Let's build a FormData object

  var fd = new FormData();
  fd.append("image", file); // Append the file
  fd.append("key", "6528448c258cff474ca9701c5bab6927");
  // Get your own key: http://api.imgur.com/

  // Create the XHR (Cross-Domain XHR FTW!!!)
  var xhr = new XMLHttpRequest();
  xhr.open("POST", "http://api.imgur.com/2/upload.json"); // Boooom!
  xhr.onload = function() {
    // Big win!
    // The URL of the image is:
    JSON.parse(xhr.responseText).upload.links.imgur_page;
   }
   // Ok, I don't handle the errors. An exercice for the reader.
   // And now, we send the formdata
   xhr.send(fd);
 }

kubetz · Accepted Answer · 2012-01-08 11:47:29Z

15

Use event.target.files for change event to retrieve the File instances.

$('#inputId').change(function(e) {
  var files = e.target.files; 

  for (var i = 0, file; file = files[i]; i++) {
    console.log(file);
  }
});

Have a look here for more info: http://www.html5rocks.com/en/tutorials/file/dndfiles/

This solution uses File API which is not supported by all browser - see http://caniuse.com/#feat=fileapi .

edited Jan 8, 2012 at 11:47

answered Jan 8, 2012 at 4:30

kubetz

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1 Comment

Daniel W. Over a year ago

Additional information: A single uploaded file is always in e.target.files[0], at that point you don't need the for loop.

Ilia G · Accepted Answer · 2012-01-08 04:34:00Z

3

This is likely referring to HTML5 files property. See w3 and sample jsfiddle

answered Jan 8, 2012 at 4:34

Ilia G

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2 Comments

Razor Storm Over a year ago

Hm, so javascript image uploading isn't possible with older browsers? Shame :(

Ilia G Over a year ago

You can always use a regular form with target to an iframe. It is less pretty to code but works.

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