Repository URL to install this package:
Version:
1.16.0 ▾
|
'use strict';
module.exports = function () {
var map;
if (typeof WeakMap !== 'function') return false;
map = new WeakMap();
if (typeof map.set !== 'function') return false;
if (map.set({}, 1) !== map) return false;
if (typeof map.clear !== 'function') return false;
if (typeof map.delete !== 'function') return false;
if (typeof map.has !== 'function') return false;
return true;
};