integrate facebook like button with dynamically loaded content

Question

The website I am working on consists of a list of items dynamically loaded via AJAX. As you scroll down the page, more items are loaded.

Now my customer wants to add a

Answer 1

call this javascript function after ajax complete ;)

fb_sharepro_render()

Answer 2

The Facebook like button is just an <iframe> on the page. There is no "Facebook API" running, as such. The like count is part of the content inside of the <iframe>, and gets loaded with the rest of the content when the src URL is loaded by the browser. The code for a like button goes like:

<iframe src="http://www.facebook.com/plugins/like.php?href=YOUR_URL"
        scrolling="no" frameborder="0"
        style="border:none; width:450px; height:80px"></iframe>

So in essence, all you should need to do is add a new <iframe> to the page in the correct location and with the correct src URL, and all the rest will be handled automatically for you.

Answer 3

Late answer, but you could use the parse function of the Facebook API in a callback of your function that loads the new elements to render the new like buttons:

FB.XFBML.parse();

You can also direct the parser to the elements you want rendered, so it doesn't re-render the already existing like buttons:

FB.XFBML.parse(document.getElementById('foo'));

This is straight from the docs: https://developers.facebook.com/docs/reference/javascript/FB.XFBML.parse/

Answer 4

Late late answer but just in case someone need it.

Just finished my project nearly same as the one described. My page gets posts via ajax in json format, and i than create dom elements including facebook like button, tweet button and google plus one button. I ve had lots of problems until i get it right. Major problem was that like buttons didnt work as expected again and again... After while i found working solution.

I am using facebook js sdk (you can find some useful info here)

<div id="fb-root"></div>
<script>
  var isFBLoaded = false;
  window.fbAsyncInit = function() {
    FB.init({
        appId: ' your api key', 
        status: true, 
        cookie: true, 
        xfbml: false
    });
    isFBLoaded = true;
    ...
    renderFBqueue(); // i ll explain this later
  };
  (function() {
    var e = document.createElement('script'); 
    e.async = true;
    e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
    document.getElementById('fb-root').appendChild(e);
  }());
</script>

It seems that there is a problem whit ajax content and FB.XFBML.parse() method or something. I found a solution on fb developers forum, and modified it to fit my needs. So after i get json content (multiple posts) from ajax call, i create all elements with jquery except fb like buttons. I put the post url (and some other related data) in queue and call function with timeout to create/parse those buttons.

var fb_queue = [];
...
function getMorePosts(){
    $.get('moreposts.php', params, function(response){
        if (response) createPosts(response);
    }, 'json');    
}
...
function createPosts(data){
    ...
    for (var key in data.posts) {
        ...
        fb_queue.push({ id : data.posts[key].id , url : data.posts[key].url });
    }
    ... // elements are created

}

and finaly to create and parse fb like buttons

function parseFBqueue(){
    if(isFBLoaded){
        if (fb_queue.length==0) return false;
        $.each(fb_queue, function (j, data) {
            window.setTimeout(function () { 
                renderFBLike(fb_queue.shift());  
            }, (j + 1) * 300); 
        });  
    };
}
function renderFBLike(data){
    var fblike = '<fb:like href="'+data.url+'" layout="button_count" ... ></fb:like>'
    $('#fbdiv-'+data.id).append(fblike);
    FB.XFBML.parse(document.getElementById('fbdiv-'+data.id'));    
}

Hope someone will find this useful, I know that I would a week ago :)