Promise JavaScript - Coding Blast - www.codingblast.com

simple-promise.js

function iGiveYouAPromise(value: number) {
    return new Promise(function (resolve, reject) {
        if (value === 4141) {
            reject('Number is too weird..')
        } else {
            setTimeout(function () {
                resolve('Success!');
            }, 1500);
        }
    });
}

let promise = iGiveYouAPromise(151);

promise.then(function (resp) {
    console.log('inside of success callback! value:', resp);
}, function (err) {
    console.log('inside of error callback! error:', err);
});