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13 lines
403 B
13 lines
403 B
"use strict"; |
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var toStringTagSymbol = require("es6-symbol").toStringTag |
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, objToString = Object.prototype.toString |
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, id = "[object WeakMap]" |
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, Global = typeof WeakMap === "undefined" ? null : WeakMap; |
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module.exports = function (value) { |
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return (value && ((Global && (value instanceof Global)) || |
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(objToString.call(value) === id) || (value[toStringTagSymbol] === "WeakMap"))) || |
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false; |
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};
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