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文件: /usr/share/nodejs/is-weakset/index.js
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'use strict'; var GetIntrinsic = require('get-intrinsic'); var callBound = require('call-bind/callBound'); var $WeakSet = GetIntrinsic('%WeakSet%', true); var $setHas = callBound('WeakSet.prototype.has', true); if ($setHas) { var $mapHas = callBound('WeakMap.prototype.has', true); module.exports = function isWeakSet(x) { if (!x || typeof x !== 'object') { return false; } try { $setHas(x, $setHas); if ($mapHas) { try { $mapHas(x, $mapHas); } catch (e) { return true; } } return x instanceof $WeakSet; // core-js workaround, pre-v3 } catch (e) {} return false; }; } else { // eslint-disable-next-line no-unused-vars module.exports = function isWeakSet(x) { // `WeakSet` does not exist, or does not have a `has` method return false; }; }
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