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							57 lines
						
					
					
						
							1.8 KiB
						
					
					
				
			
		
		
	
	
							57 lines
						
					
					
						
							1.8 KiB
						
					
					
				'use strict'; | 
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var GetIntrinsic = require('get-intrinsic'); | 
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var $SyntaxError = GetIntrinsic('%SyntaxError%'); | 
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var $TypeError = GetIntrinsic('%TypeError%'); | 
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var $preventExtensions = GetIntrinsic('%Object.preventExtensions%'); | 
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var $gOPD = require('../helpers/getOwnPropertyDescriptor'); | 
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var $gOPN = GetIntrinsic('%Object.getOwnPropertyNames%'); | 
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var forEach = require('../helpers/forEach'); | 
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var DefinePropertyOrThrow = require('./DefinePropertyOrThrow'); | 
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var IsAccessorDescriptor = require('./IsAccessorDescriptor'); | 
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var ToPropertyDescriptor = require('./ToPropertyDescriptor'); | 
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var Type = require('./Type'); | 
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// https://ecma-international.org/ecma-262/6.0/#sec-setintegritylevel | 
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module.exports = function SetIntegrityLevel(O, level) { | 
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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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	if (level !== 'sealed' && level !== 'frozen') { | 
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		throw new $TypeError('Assertion failed: `level` must be `"sealed"` or `"frozen"`'); | 
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	} | 
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	if (!$preventExtensions) { | 
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		throw new $SyntaxError('SetIntegrityLevel requires native `Object.preventExtensions` support'); | 
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	} | 
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	var status = $preventExtensions(O); | 
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	if (!status) { | 
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		return false; | 
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	} | 
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	if (!$gOPN) { | 
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		throw new $SyntaxError('SetIntegrityLevel requires native `Object.getOwnPropertyNames` support'); | 
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	} | 
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	var theKeys = $gOPN(O); | 
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	if (level === 'sealed') { | 
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		forEach(theKeys, function (k) { | 
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			DefinePropertyOrThrow(O, k, { configurable: false }); | 
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		}); | 
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	} else if (level === 'frozen') { | 
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		forEach(theKeys, function (k) { | 
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			var currentDesc = $gOPD(O, k); | 
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			if (typeof currentDesc !== 'undefined') { | 
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				var desc; | 
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				if (IsAccessorDescriptor(ToPropertyDescriptor(currentDesc))) { | 
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					desc = { configurable: false }; | 
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				} else { | 
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					desc = { configurable: false, writable: false }; | 
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				} | 
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				DefinePropertyOrThrow(O, k, desc); | 
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			} | 
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		}); | 
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	} | 
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	return true; | 
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};
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