How Can I Check If The Browser Support Html5 File Upload (formdata Object)?

How can I check if the browser support HTML5 file upload (FormData object)? var fd = new FormData(); Following the answer from this post, but the code does not return correct answ

Solution 1:

Try if( window.FormData === undefined ) or if( window.FormData !== undefined ).

Solution 2:

From http://blog.new-bamboo.co.uk/2010/7/30/html5-powered-ajax-file-uploads

function supportAjaxUploadProgressEvents() {
    var xhr = new XMLHttpRequest();
    return !! (xhr && ('upload'in xhr) && ('onprogress'in xhr.upload));
};

As FormData, the ability to send() one, and the upload property (and its onprogress event) are all part of XMLHttpRequest level 2, you can test for .upload to see if you've got a level 2. I don't have a Mac handy, but the function (sadly, but correctly) returns false for Opera 11.50 (and true for Firefox 4).

Solution 3:

functionsupportFormData() {
     return !! window.FormData;
  }

Source: https://www.new-bamboo.co.uk/blog/2012/01/10/ridiculously-simple-ajax-uploads-with-formdata/

Solution 4:

This is the one-liner I use to check if the browser supports FormData and upload progress, in jQuery:

var xhr2 = !! ( window.FormData && ("upload"in ($.ajaxSettings.xhr()) );

Solution 5:

You could may be use the workaround provided by this library. https://github.com/francois2metz/html5-formdata