Mastering JavaScript Promises

The combination of success and error

The $http returns a promise; you can define its success or error depending on this promise. Many think that these functions are a standard part of promise—but in reality, they are not as they seem to be.

Using promise means you are calling then(). It takes two parameters—a callback function for success and a callback function for failure.

Imagine this code:

$http.get("/api/tv/serials/sherlockHolmes")
.success(function(name) {
    console.log("The tele serial name is : " + name);
})
.error(function(response, status) {
    console.log("Request failed " + response + " status code: " + status);
};

This can be rewritten as:

$http.get("/api/tv/serials/sherlockHolmes") .success(function(name) { console.log("The tele serial name ...