is-implemented.js 247 Bytes Raw Blame History Permalink 1 2 3 4 5 6 7 8 9 "use strict"; module.exports = function () { var from = Array.from, arr, result; if (typeof from !== "function") return false; arr = ["raz", "dwa"]; result = from(arr); return Boolean(result && (result !== arr) && (result[1] === "dwa")); };