Unlike several Facebook fan pages at once - javascript

Is it possible to trigger an "Unlike" event of some specified Facebook fan pages via Javascript (or another language) after a button click, so the users can remove their "Like" from the Facebook fan pages that they want to unlike directly in my web page through a simple "Unlike Button" click ?

This would be the only option, but it does not seem to work for Pages: https://developers.facebook.com/docs/graph-api/reference/v2.5/object/likes#update
In other words, it´s not possible to remove Page likes with the API. You have to present Like Buttons for that.

Related

Dynamically add Like Buttons to a page

I'm building a page that is aggregating other pages in a Wordpress site, and displaying snippets of information about them along with a 'Like' button. Right now I'm using the iFrame option.
What happens is when a user clicks on a video, it displays it in a Feature area with the video, some text, and a Like button. This HTML is generated from a template and created after a user clicks on a video to watch it. There isn't a page refresh.
If I use the HTML5 version of the Like button, it never gets rendered, which I'm guessing is because the Like div never exists when the Facebook init is called. I'd like to not use the iFrame version though, because it doesn't seem to let me allow people to comment on their like.
Is there a way to have Facebook re-scan for elements to render? I know that Twitter will allow you to do this by running twttr.widgets.load() at any time to have it rescan for things to render.
Just call this function after loading the dynamic site, i am pretty sure it´s what you need:
https://developers.facebook.com/docs/reference/javascript/FB.XFBML.parse/

Twitter Follow Button: Get the status (followed or not) of the button on load with javascript?

I need to get the status of a twitter "follow" button on load, not on click.
I'm currently loading the button via ajax, and call twttr.widgets.load() to get the widjet.js to do it's magic.
I am aware of binding "follow" and "unfollow" to accept the callbacks from clicking the buttons, but how do I detect the current state of the button before any user interaction?
For instance, the page loads and the user is signed into twitter and currently following the target of the follow button, so it appears that they've already followed the user.
How do I detect this with javascript/jquery? I am not authorizing them through twitter at this point, so I can't check via their api.
Other attempts:
I've also tried getting the contents of the iframe via javascript,
since the twitter follow button iframe has a class specifying the
state of the button, but it doesn't seem to be possible due to CORS.
I expect the answer is you can't.
The twitter follow button is in an iframe expressly to prevent you from accessing it and obtaining information they don't want you to have.
Facebook operates similarly. The like button is in an iframe, and therefore you cannot use it to determine if a person has 'liked' a particular page. That information requires permission from the user.

Tracking Social Button Clicks in Javascript

On a website, I have some social buttons (tweet, facebook like, google+1, ..). Most of them are inserted using an iframe.
The task is to track use interaction with those buttons: if someone +1'ed the content - and AJAX request should update my local statistics on the server.
However, with JS I can't access the contents of the iframe due to security restrictions: can't bind 'click' event.
How do I track clicks on those social buttons, then?
Possible solutions:
Bind 'click' to the iframe object itself: it does not work.
Add buttons inline, w/o an iframe. No go: I should also display the number of likes for every button.
Try to use Social Service APIs to insert without an iframe. Not all services support this.
You can't. If you could catch clicks on them you could also trigger clicks on them which would be pretty bad (imagine porn sites making you "like" them automatically).
The only thing you can do is using the APIs of the various sites to retrieve the number of people who liked/+1'd/etc. your site.
Most of the social buttons from the main companies enable your Javascript to detect when the button has been pressed. They usually do this via Javascript events.
In other words, they'll tell your code that they've been pressed, you don't have to detect it on your own.
Twitter
info on their javascript events
Facebook
You need to use the XFBML version of the button. From the Facebook Like button FAQ
How do I know when a user clicks a Like button?
If you are using the XFBML version of the button, you can subscribe to the 'edge.create' event through FB.Event.subscribe.
Google +1
See the callback parameter in their docs. See section +1 Tag Attributes. You provide a Javascript (JS) function to their button. Your JS is then called by them when the button is pushed. Easy!

Is there a way to __doPostBack to another page using javascript?

I'm writing a suite of admin tools to sit on top of our existing site that will allow a user to quickly administer a number of pages from one convenient jquery ui window.
The issue I'm running into is that a lot of the functionality requires postbacks on specific pages, while this admin overlay can be accessed from any page. This means that in order for the functionality to work, the postback has to be sent to the correct page (or the page has to be loaded before the postback is triggered).
I've looked at Causing a PostBack to a different page from a PopUp and several c# posts, but they do not appear to address the specific issue of moving to another page prior to firing the postback using javascript.
Possible Solution: one solution I considered is using cookies transmit information about which postback events need to fire and what parameters to use while using javascript to load the correct page. It's not a great solution, so I was wondering if anyone here could think of a better one.

Using AJAX for page items while still allowing them to be opened in a new tab/window

I'm looking at using AJAX to allow some content within part of a page to be reloaded without reloading the entire web page (eg things like overview, reviews, specifications, etc pages about a single item).
The problem is however I still want to allow users to open these items in a new tab or window (using the normal systems for their web browser such as right clicking the link and picking "Open Link in New Tab) rather than just left clicking the link).
Is it at all possible to do this, or is it just generally best practice to reload the entire page in cases like this?
It's very much doable. You simply need to provide an href and an onclick in your links.
The href will activate if the user has no JS, or if the user decides to open the link in a special way (new tab, etc.)
The onclick will activate on "normal" clicks of the link. You can then cancel the default action (by returning false or using your JS lib of choice's way to do it) and do your ajax stuff.
It is possible, in fact its even possible to set up a timer to update portions of pages periodically. If you are using jquery it'd be something like this:
setInterval(function() {
$('#your-div').load('your-server-side-request.php');
}, 3000);
of course you could simply bind to a link, and on refresh use .load().
OR you could even just do this with normal javascript and use my script above as pseudocode essentially.

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