How to trace if visitor already "liked" page via Facebook using JS only?

Question

After checking 20+ answers I'm sure there is no way to trace (using JS only) if user already "liked / recommended" page few days ago or not - but anyway: how to trace if page on 3rd party site ("application") already liked by visitor few days ago?

I need JS code - without server-side languages like PHP - something like

FB.api(
  {
    method: 'link.getStats',
    url: 'example.com'
  },
  function(response) {
    if(response.liked) {
      alert('me likey!');
  }
);

Is there something like this? Thanks!

Answer 1

You can use the graph API to confirm if a user likes a page.

You'll need the ID of the object to query though.

FB.api('/me/likes/[page_id]',
  function(response) {
    if(response.data.length > 0) {
      alert('me likey!');
  }}
);