Imagine a scenario where we want to do something after the concurrent requests for 'foo' and 'bar' have completed successfully, or report an error if one or both of them fails:

$.when($.getJSON('foo'), $.getJSON('bar'))
  .then(function(foo, bar) {
    console.log( 'I fire if BOTH requests are successful!' );
  })
  .fail(function() {
    console.log( 'I fire if one or more requests failed.' );
  });

How can I determine if 1) the request for 'foo' failed, or 2) the request for 'bar' failed, or 3) if both failed?

javascript jquery jquery-deferred
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