jquery-deferred - w3toppers.com

jQuery deferreds and promises – .then() vs .done()

The callbacks attached to done() will be fired when the deferred is resolved. The callbacks attached to fail() will be fired when the deferred is rejected. Prior to jQuery 1.8, then() was just syntactic sugar: promise.then( doneCallback, failCallback ) // was equivalent to promise.done( doneCallback ).fail( failCallback ) As of 1.8, then() is an alias … Read more

Pass in an array of Deferreds to $.when()

To pass an array of values to any function that normally expects them to be separate parameters, use Function.prototype.apply, so in this case you need: $.when.apply($, my_array).then( ___ ); See http://jsfiddle.net/YNGcm/21/ In ES6, you can use the … spread operator instead: $.when(…my_array).then( ___ ); In either case, since it’s unlikely that you’ll known in advance … Read more