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@mishelashala
Last active Jul 27, 2020
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// PromisedNumber :: () -> Promise<error>
const PromisedNumber = () => new Promise(function (fulfill, reject) {
setTimeout(() => { reject(new Error('could not produce number')) }, 500)
})
// PromisedString :: () -> Promise<string>
const PromisedString = () => new Promise(function (fulfill, reject) {
setTimeout(() => { fulfill(10) }, 1000)
})
console.log('start')
const AsyncPipeline = () => {
// we don't actually need these two variables
const promisedNumber = PromisedNumber()
const promisedString = PromisedString()
promisedNumber.then((value) => {
console.log('number: ', value)
return promisedString
})
.then((value) => { console.log('string:', value) })
.catch((err) => { console.log('error:', err.message) })
}
AsyncPipeline()
console.log('finish')
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