jeena/en.javascript.info
1
0
Fork 0
Code Issues Pull requests Projects Packages Wiki Activity Actions

closes #1309

Browse source
This commit is contained in:
Ilya Kantor 2019-09-02 23:21:04 +03:00
parent 08a9560166
commit 15f8b887f1
1 changed files with 8 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

10
1-js/07-object-properties/01-property-descriptors/article.md
View file

@ -227,8 +227,6 @@ To be precise, non-configurability imposes several restrictions on `defineProper
3. Can't change `writable: false` to `true` (the other way round works). 3. Can't change `writable: false` to `true` (the other way round works).
4. Can't change `get/set` for an accessor property (but can assign them if absent). 4. Can't change `get/set` for an accessor property (but can assign them if absent).
Notable exception: a value of non-configurable, but writable property still can be changed.
Here we are making `user.name` a "forever sealed" constant: Here we are making `user.name` a "forever sealed" constant:
```js run ```js run
@ -250,6 +248,14 @@ Object.defineProperty(user, "name", {writable: true}); // Error
*/!* */!*
``` ```
```smart header="Non-configurable doesn't mean \"non-writable\""
Notable exception: a value of non-configurable, but writable property can be changed.
The idea of `configurable: false` is to prevent changes to property flags and its deletion, not changes to its value.
```
## Object.defineProperties ## Object.defineProperties
There's a method [Object.defineProperties(obj, descriptors)](mdn:js/Object/defineProperties) that allows to define many properties at once. There's a method [Object.defineProperties(obj, descriptors)](mdn:js/Object/defineProperties) that allows to define many properties at once.