You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.8 KiB
58 lines
1.8 KiB
4 years ago
|
'use strict';
|
||
|
|
|
||
|
|
var GetIntrinsic = require('../GetIntrinsic');
|
||
|
|
|
||
|
|
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://www.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;
|
||
|
|
};
|