javascript promise all
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"]
});javascript promise all
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"]
});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);
});
// expected output: Array [3, 42, "foo"]promise.all
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}`))
view rawpromise.all
// A simple promise that resolves after a given time
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))
})
// We are passing an array of pending promises to Promise.all
Promise.all(promises)
.then(response => console.log(response)) // Promise.all cannot be resolved, as one of the promises passed got rejected.
.catch(error => console.log(`Error in executing ${error}`)) // Promise.all throws an error.promise.all
var p1 = Promise.resolve(3);
var p2 = 1337;
var p3 = new Promise((resolve, reject) => {
setTimeout(() => {
resolve("foo");
}, 100);
});
Promise.all([p1, p2, p3]).then(values => {
console.log(values); // [3, 1337, "foo"]
});promise.all
// A simple promise that resolves after a given time
const timeOut = (t) => {
return new Promise((resolve, reject) => {
setTimeout(() => {
resolve(`Completed in ${t}`)
}, t)
})
}
// Resolving a normal promise.
timeOut(1000)
.then(result => console.log(result)) // Completed in 1000
// Promise.all
Promise.all([timeOut(1000), timeOut(2000)])
.then(result => console.log(result)) // ["Completed in 1000", "Completed in 2000"]Copyright © 2021 Codeinu
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