is-native-implemented.js 275 Bytes Raw Blame History Permalink 1 2 3 4 5 6 7 8 // Exports true if environment provides native `WeakMap` implementation, whatever that is. 'use strict'; module.exports = (function () { if (typeof WeakMap !== 'function') return false; return (Object.prototype.toString.call(new WeakMap()) === '[object WeakMap]'); }());