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