promise.all usage code example
Example 1: promise all
Promise.all([Promise1, Promise2, Promise3])
.then(result) => {
console.log(result)
})
.catch(error => console.log(`Error in promises ${error}`))
Example 2: Promise.all
const promise1 = Promise.resolve(3);
const promise2 = 42;
const promise3 = new Promise(function(resolve, reject) {
setTimeout(resolve, 100, 'foo');
});
Promise.all([promise1, promise2, promise3]).then(function(values) {
console.log(values);
});
Example 3: promise.all
const timeOut = (t) => {
return new Promise((resolve, reject) => {
setTimeout(() => {
if (t === 2000) {
reject(`Rejected in ${t}`)
} else {
resolve(`Completed in ${t}`)
}
}, t)
})
}
const durations = [1000, 2000, 3000]
const promises = []
durations.map((duration) => {
promises.push(timeOut(duration))
})
Promise.all(promises)
.then(response => console.log(response))
.catch(error => console.log(`Error in executing ${error}`))