wishthis/node_modules/es6-weak-map/is-weak-map.js

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2022-01-21 08:28:41 +00:00
"use strict";
var toStringTagSymbol = require("es6-symbol").toStringTag
, objToString = Object.prototype.toString
, id = "[object WeakMap]"
, Global = typeof WeakMap === "undefined" ? null : WeakMap;
module.exports = function (value) {
return (value && ((Global && (value instanceof Global)) ||
(objToString.call(value) === id) || (value[toStringTagSymbol] === "WeakMap"))) ||
false;
};