| 'use strict'; |
| |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| var $SyntaxError = GetIntrinsic('%SyntaxError%'); |
| var $TypeError = GetIntrinsic('%TypeError%'); |
| var $preventExtensions = GetIntrinsic('%Object.preventExtensions%'); |
| var $gOPD = require('../helpers/getOwnPropertyDescriptor'); |
| var $gOPN = GetIntrinsic('%Object.getOwnPropertyNames%'); |
| |
| var forEach = require('../helpers/forEach'); |
| |
| var DefinePropertyOrThrow = require('./DefinePropertyOrThrow'); |
| var IsAccessorDescriptor = require('./IsAccessorDescriptor'); |
| var ToPropertyDescriptor = require('./ToPropertyDescriptor'); |
| var Type = require('./Type'); |
| |
| // https://ecma-international.org/ecma-262/6.0/#sec-setintegritylevel |
| |
| module.exports = function SetIntegrityLevel(O, level) { |
| if (Type(O) !== 'Object') { |
| throw new $TypeError('Assertion failed: Type(O) is not Object'); |
| } |
| if (level !== 'sealed' && level !== 'frozen') { |
| throw new $TypeError('Assertion failed: `level` must be `"sealed"` or `"frozen"`'); |
| } |
| if (!$preventExtensions) { |
| throw new $SyntaxError('SetIntegrityLevel requires native `Object.preventExtensions` support'); |
| } |
| var status = $preventExtensions(O); |
| if (!status) { |
| return false; |
| } |
| if (!$gOPN) { |
| throw new $SyntaxError('SetIntegrityLevel requires native `Object.getOwnPropertyNames` support'); |
| } |
| var theKeys = $gOPN(O); |
| if (level === 'sealed') { |
| forEach(theKeys, function (k) { |
| DefinePropertyOrThrow(O, k, { configurable: false }); |
| }); |
| } else if (level === 'frozen') { |
| forEach(theKeys, function (k) { |
| var currentDesc = $gOPD(O, k); |
| if (typeof currentDesc !== 'undefined') { |
| var desc; |
| if (IsAccessorDescriptor(ToPropertyDescriptor(currentDesc))) { |
| desc = { configurable: false }; |
| } else { |
| desc = { configurable: false, writable: false }; |
| } |
| DefinePropertyOrThrow(O, k, desc); |
| } |
| }); |
| } |
| return true; |
| }; |