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