/Javascript/Node.js/Return promise in node js

Return promise in node js

Javascript return promise

function doSomething() {
  return new Promise((resolve, reject) => {
    console.log("It is done.");
    // Succeed half of the time.
    if (Math.random() > .5) {
      resolve("SUCCESS")
    } else {
      reject("FAILURE")
    }
  })
}

const promise = doSomething(); 
promise.then(successCallback, failureCallback);

Source: developer.mozilla.org

Return promise in node js

module.exports.getAllPosts = function()
{
    return new Promise((resolve,reject)=>{

        if(posts == true)
        {
          resolve("success");
        }else{
        reject("Failed");
        }
    });
}

Js return a promise

function myAsyncFunction(url) {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.open("GET", url);
    xhr.onload = () => resolve(xhr.responseText);
    xhr.onerror = () => reject(xhr.statusText);
    xhr.send();
  });
}

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