javascript promise all
try {
const [res1, res2, res3] = await Promise.all([
Promise1,
Promise2,
Promise3,
]);
} catch (err) {
console.error(err);
}
var p1 = Promise.resolve(3);
var p2 = 1337;
var p3 = new Promise((resolve, reject) => {
setTimeout(resolve, 100, "foo");
});
Promise.all([p1, p2, p3]).then(values => {
console.log(values); // [3, 1337, "foo"]
});var p1 = new Promise((resolve, reject) => {
setTimeout(resolve, 1000, "one");
});
var p2 = new Promise((resolve, reject) => {
setTimeout(resolve, 2000, "two");
});
var p3 = new Promise((resolve, reject) => {
setTimeout(resolve, 3000, "three");
});
var p4 = new Promise((resolve, reject) => {
setTimeout(resolve, 4000, "four");
});
var p5 = new Promise((resolve, reject) => {
reject("reject");
});
Promise.all([p1, p2, p3, p4, p5]).then(values => {
console.log(values);
}, reason => {
console.log(reason)
});
//From console:
//"reject"
// Evenly, it's possible to use .catch
Promise.all([p1, p2, p3, p4, p5]).then(values => {
console.log(values);
}).catch(reason => {
console.log(reason)
});
//From console:
//"reject"
const durations = [1000, 2000, 3000]
promises = durations.map((duration) => {
return timeOut(duration).catch(e => e) // Handling the error for each promise.
})
Promise.all(promises)
.then(response => console.log(response)) // ["Completed in 1000", "Rejected in 2000", "Completed in 3000"]
.catch(error => console.log(`Error in executing ${error}`))
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