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.
16 lines
729 B
16 lines
729 B
var $ = require('../internals/export');
|
|
var isObject = require('../internals/is-object');
|
|
var onFreeze = require('../internals/internal-metadata').onFreeze;
|
|
var FREEZING = require('../internals/freezing');
|
|
var fails = require('../internals/fails');
|
|
|
|
var nativePreventExtensions = Object.preventExtensions;
|
|
var FAILS_ON_PRIMITIVES = fails(function () { nativePreventExtensions(1); });
|
|
|
|
// `Object.preventExtensions` method
|
|
// https://tc39.github.io/ecma262/#sec-object.preventextensions
|
|
$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {
|
|
preventExtensions: function preventExtensions(it) {
|
|
return nativePreventExtensions && isObject(it) ? nativePreventExtensions(onFreeze(it)) : it;
|
|
}
|
|
});
|
|
|