Question

I have a custom wrapper function around jquery ajax.

custom.get = function (path, callback) {
  // do other things
  $.get(path, function () {
    callback()
  })
}

doing

$.when(custom.get(path), custom.get(path)).done(function (result1, result2) { callback})

doesn’t seem to work. Is it supposed to work? Any alternatives for doing defers?

Answer 1

You need to return the jXHR object (which abstracts a jQuery Deferred) from your custom.get() function in order to make this work:

custom.get = function (path, callback) {
  // do other things
  return $.get(path, function () {
     if( typeof callback === 'function') callback();
  })
} 

You should also check if your second parameter passed in, really is a function to avoid unnecessary errors, see above.