Getting a strange unexpected token with creating a file upload in React.js

I am using React as framework to create input for a project. Input is a name, photo and an optional comment. The name and comment I got working, but the photo (being a file) gives me some trouble.

I am using this as a method for uploading. (I know that the quality of the photo must be very low to use base64 for it, but that is not a problem for this project.)

However, when I used this code, my browser threw an Unexpected token error in the console, at a location where there was just a tab. I have located the error to this piece of code (by commenting out different pieces).

reader.onload = function(output){
      fileUpload.set({
         file: output.target.result
      });
      $.when(fileUpload.save())
        .done(function(){
        this.setState({
          uploaded: true
        });
      }.bind(this));
    }.bind(this));

I just can't see what is wrong with it and why it is throwing that error.

It looks like your parens may be mismatched. Here's the same code with additional formatting:

reader.onload = function(output) {

  fileUpload.set({ file: output.target.result });

  $.when(fileUpload.save())
  .done(
    function() {
      this.setState({ uploaded: true });
    }.bind(this)
  );

}.bind(this)
); // extra

The last line has an additional ) that does not have a matching ( at the start of the expression.