How to get user's Cover on Facebook via javascript? -

i use several types of url:

fb.api('/me?fields=cover', function(response) { fb.api('/{userid}?fields=cover', function(response) { fb.api('/{userid}/fields=cover', function(response) { 

but facebook id only. can user profile pic when code:

fb.api("/me/picture?width=180&height=180" 

how user's cover? thanks

when query cover picture, additional information returned object. have traverse through object , value of source.

  fb.api('/me?fields=cover', function(response) {         console.log(response.cover.source);   }); 

always use console.log(object); see has got in it.