Ajax example with promises

query-api-ajax

// Use this solution when we need to do an action when the request is finished

var myPromise = function(){
    return new Promise(function(resolve,reject){
        var xhr = new XMLHttpRequest(); 
        xhr.open('GET','https://api.github.com/users/brunotdantas');
        xhr.send(null); // if you have any parameters to complement the request 

        xhr.onreadystatechange = function(){
            if(xhr.readyState === 4){
                //request finished and response is ready
                if (xhr.status === 200){
                    resolve(JSON.parse(xhr.responseText)); // returned value 
                }else{
                    reject('Request Error');
                }
            }
        }
    })
}


myPromise()
    .then(function(response){
        console.log(response);
    })
    .catch(function(error){
        console.warn(error);
    })

Use Axios to an enhanced request
https://github.com/axios/axios

axios.get('https://api.guthub.com/users/brunotdantas')
    .then(function(response){
        console.log(response);
    })
    .catch(function(error){
        console.warn(error);
    })