11 lines
286 B
JavaScript
11 lines
286 B
JavaScript
|
// Exports true if environment provides native `WeakMap` implementation,
|
||
|
|
// whatever that is.
|
||
|
|
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
module.exports = (function () {
|
||
|
|
if (typeof WeakMap === 'undefined') return false;
|
||
|
|
return (Object.prototype.toString.call(WeakMap.prototype) ===
|
||
|
|
'[object WeakMap]');
|
||
|
|
}());
|