9 lines
273 B
JavaScript
9 lines
273 B
JavaScript
|
// 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]";
|
||
|
|
}());
|