promises test

promisestest.js

// difference beetween race and all

// ALL

const promise1 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('promise1 resolved! timeout')
    }, 2000)
})


const promise2 = new Promise((resolve, reject) => {
        resolve('promise2 resolved!')
})

const promise3 = new Promise((resolve, reject) => {
        resolve('promise3 resolved!')
})

const resolveAll = Promise.all([promise1, promise2, promise3]).then((data) => {
    console.log(data)

})

// RACE

const promise4 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('promise4 resolved! timeout')
    }, 2000)
})


const promise5 = new Promise((resolve, reject) => {
        resolve('promise5 resolved!')
})

const promise6 = new Promise((resolve, reject) => {
        resolve('promise6 resolved!')
})

const resolveAllRace = Promise.race([promise4, promise6, promise5]).then((data) => {
    console.log(data)
})

//promise6 resolved!
//[ 'promise1 resolved! timeout',
// 'promise2 resolved!',
// 'promise3 resolved!' ]

//all will wait for all promises be done
//race will result only the fastest promise