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rogerwalt/promise.js

Created February 20, 2020 12:47
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promise.js
const fileNames = ['one.js', 'two.scss', 'three.scss'];
const getAllFileNames = () => new Promise((resolve, reject) => { resolve(fileNames) })
const filterScssFiles = (fileNames) => new Promise((resolve, reject) => resolve(fileNames.filter(fileName => fileName.endsWith('.scss'))))
getAllFileNames().then(fileNames => filterScssFiles(fileNames))
.then(scssFileNames => console.log(scssFileNames))
.catch(err => console.error(err))
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