CODEWITHSUNDEEP
callbackpromise
Mahdi Akbary
Mahdi Akbary

Reputation: 107

Isn't the concept of promise as the same as callbacks?

it's almost a few months that i'm working with javaScript and i came to understand the meaning of callbacks and now i'm confused : Isn't the concept of promise as the same as callbacks?

API.one(function(err,data){
    API.two(function(err,data2){
        API.three(function(err,data3){

        });
    });
});

Upvotes: 0

Views: 28

Answers (1)

Mike Hohne
Mike Hohne

Reputation: 472

They are similar. For me promises, such as .catch(), .then(), do better with handling returns and error handling. So if you have nested callbacks to handle errors, the error may escape one callback function but it WILL be caught by a promise like .catch(). 

this.myFunction(){
 $http({method: 'get',
         url: url})
     .then(function(err,results){
       console.log(results);
 };

Angular Example

Upvotes: 1

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