My favorite feature in Windows 8 has to be the Share Charm. I really think it’s a great and unique idea. If you don’t know what the Share Charm is, do yourself a favor and read about it ASAP here:

One of the most trivial implementations to sharing is sharing to Facebook. To my big surprise, I found out that Windows 8 has no built in Share to Facebook option. The People app has Sharing capabilities, but it only lets you post to your profile. What about sharing to in a private message? What about posting to a group? In my personal experience these are far more common use cases.

I’ve been playing around with the idea of creating this Share to Facebook thing myself, but I always kept hoping that someday they’ll just add it. The official Facebook app has a Share target, but it is just as useless as the People app share target.

So I gave up, I created my own Facebook share target. I’m just putting it here in case anyone else feels the same as I do about the built in Facebook sharing functionality. I’m not going to submit it to the store because I think it’s a stupid app. I really hope Microsoft or Facebook will add this soon and this post will be obsolete.

Here it is in action: my FB sharer

The code is basically just this:

(function () {
    'use strict';

    var app = WinJS.Application;
    var share;
    var fbShareUrlTemplate = '';

    app.onready = function (args) {
        theWebView.addEventListener(MSWebViewNavigationStarting, navigationStarting);

    app.onactivated = function (args) {
        if (args.detail.kind === Windows.ApplicationModel.Activation.ActivationKind.shareTarget) {
            share = args.detail.shareOperation;

            if ( {
       (uri) {
                    if (uri != null) {
                        var urlToNavigate = fbShareUrlTemplate + uri.absoluteUri;

    function navigationStarting(args)
        var url = args.uri;
        if (url.substr(0, fbShareUrlTemplate.length) !== fbShareUrlTemplate) { // if the url doesn't start with fbShareUrlTemplate


A couple of things to note:

  • It uses Facebook’s deprecated sharer.php.
  • It can only share urls, like from IE.
  • It is poorly written and tested.

Yes, I am lazy. But it’s serves me well, and I’m happy with it. And it just proves how simple it is to implement, so Microsoft \ Facebook – Please do!