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