main
Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
Update repo after prototype presentation
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Property mode
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100644
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File size:
911 bytes
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[d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var GetIntrinsic = require('get-intrinsic');
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| 4 |
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| 5 | var $TypeError = require('es-errors/type');
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| 6 |
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| 7 | var $hasInstance = GetIntrinsic('Symbol.hasInstance', true);
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| 8 |
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| 9 | var Call = require('./Call');
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| 10 | var GetMethod = require('./GetMethod');
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| 11 | var IsCallable = require('./IsCallable');
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| 12 | var OrdinaryHasInstance = require('./OrdinaryHasInstance');
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| 13 | var ToBoolean = require('./ToBoolean');
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| 14 | var Type = require('./Type');
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| 15 |
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| 16 | // https://262.ecma-international.org/6.0/#sec-instanceofoperator
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| 17 |
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| 18 | module.exports = function InstanceofOperator(O, C) {
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| 19 | if (Type(O) !== 'Object') {
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| 20 | throw new $TypeError('Assertion failed: Type(O) is not Object');
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| 21 | }
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| 22 | var instOfHandler = $hasInstance ? GetMethod(C, $hasInstance) : void 0;
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| 23 | if (typeof instOfHandler !== 'undefined') {
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| 24 | return ToBoolean(Call(instOfHandler, C, [O]));
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| 25 | }
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| 26 | if (!IsCallable(C)) {
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| 27 | throw new $TypeError('`C` is not Callable');
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| 28 | }
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| 29 | return OrdinaryHasInstance(C, O);
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| 30 | };
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