deferred

A mini deferred plugin, having just what you need.

This module is published with UMD support, globally accessible via $def variable. It is also available on npm named mini-deferred.

NPM Installation

npm install mini-deferred --save

var $def = require('mini-deferred');

Usage $def method

var promise = $def(function(resolve,reject,notify){
        $.ajax({
           url : "/api",
           success : function(data){
              //do something
              resolve(data);
           },
           error : reject,
           progress : notify
        })
});

promise.then(function(data){
   //do something with success data
   return data + "Some new data";
},function(err){
    //handle error
},function(value){
    //display progress
})
//chain promises
.then(function(data){
   //do something else with success data
   return data + "Some new data";
},function(err){
    //handle error
},function(value){
    //display progress
})

Creating a deferred object $def.defer()

var defer = $def.defer();
$.ajax({
       url : "/api2",
       success : function(data){
          //do something
          defer.resolve(data);
       },
       error : defer.reject,
       progress : defer.notify
    })

var promise2 = defer.promise();

Doing something after multiple promise $def.when()

  $def.when(promise,promise2).then(function(data){
    //data will be arry of resolve data
    //[promise 1 resolve data, promise 2 resolve data]
  },function(err){
    //handle error
  })

promise.then()

promise.then(onSuccess,onError,onProgress);

promise.done()

promise.done(onSuccess);

promise.fail()

promise.fail(onError);

promise.progress()

promise.progress(onProgress);

promise.always()

promise.always(function(data){
  // comes here whether it's success or fail
});

promise.state() // return state of promise