Sha256: 3a126ecffc3e3cee302010d264d0864853953224fd5b5625633d1696b468a336
Contents?: true
Size: 1.78 KB
Versions: 243
Compression:
Stored size: 1.78 KB
Contents
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var $TypeError = GetIntrinsic('%TypeError%');
var $preventExtensions = GetIntrinsic('%Object.preventExtensions%', true);
var $gOPD = require('gopd');
var $gOPN = GetIntrinsic('%Object.getOwnPropertyNames%', true);
var forEach = require('../helpers/forEach');
var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
var IsAccessorDescriptor = require('./IsAccessorDescriptor');
var ToPropertyDescriptor = require('./ToPropertyDescriptor');
var Type = require('./Type');
// https://262.ecma-international.org/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;
};
Version data entries
243 entries across 27 versions & 2 rubygems