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

Update article.md

Browse source
This commit is contained in:
Mau Di Bert 2019-06-27 09:39:00 -03:00 • committed by GitHub
parent e0def22946
commit a9622d8b00
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

8
1-js/07-object-properties/01-property-descriptors/article.md
View file

@ -122,6 +122,10 @@ user.name = "Pete"; // Error: Cannot assign to read only property 'name'...
Now no one can change the name of our user, unless they apply their own `defineProperty` to override ours.
```smart header="Errors appear only in use strict"
In the non-strict mode, no errors occur when writing to read-only properties and such. But the operation still won't succeed. Flag-violating actions are just silently ignored in non-strict.
```
Here's the same operation, but for the case when a property doesn't exist:
```js run
@ -239,10 +243,6 @@ Object.defineProperty(user, "name", {writable: true}); // Error
*/!*
```
```smart header="Errors appear only in use strict"
In the non-strict mode, no errors occur when writing to read-only properties and such. But the operation still won't succeed. Flag-violating actions are just silently ignored in non-strict.
```
## Object.defineProperties
There's a method [Object.defineProperties(obj, descriptors)](mdn:js/Object/defineProperties) that allows to define many properties at once.