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30 lines
918 B
30 lines
918 B
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var $TypeError = GetIntrinsic('%TypeError%'); |
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var $hasInstance = GetIntrinsic('Symbol.hasInstance', true); |
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var Call = require('./Call'); |
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var GetMethod = require('./GetMethod'); |
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var IsCallable = require('./IsCallable'); |
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var OrdinaryHasInstance = require('./OrdinaryHasInstance'); |
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var ToBoolean = require('./ToBoolean'); |
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var Type = require('./Type'); |
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// https://ecma-international.org/ecma-262/6.0/#sec-instanceofoperator |
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module.exports = function InstanceofOperator(O, C) { |
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if (Type(O) !== 'Object') { |
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throw new $TypeError('Assertion failed: Type(O) is not Object'); |
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} |
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var instOfHandler = $hasInstance ? GetMethod(C, $hasInstance) : void 0; |
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if (typeof instOfHandler !== 'undefined') { |
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return ToBoolean(Call(instOfHandler, C, [O])); |
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} |
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if (!IsCallable(C)) { |
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throw new $TypeError('`C` is not Callable'); |
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} |
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return OrdinaryHasInstance(C, O); |
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};
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