# Set Page Value

![](https://1781865142-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LvaO9X8rr2FG8JwKkhC-1769347644%2Fuploads%2Fgit-blob-6059abab493f6279098d5770a8f4f91c6d4337ea%2FCaptura%20de%20Pantalla%202020-02-10%20a%20la\(s\)%2012.01.17.png?alt=media)

![](https://1781865142-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LvaO9X8rr2FG8JwKkhC-1769347644%2Fuploads%2Fgit-blob-1d2aa91b99b50e74c9dd0685f12d65edc07225e2%2Fezgif.com-video-to-gif%20\(2\).gif?alt=media)

### &#x20;<a href="#entry-vars" id="entry-vars"></a>

### 📥 Entry vars <a href="#entry-vars" id="entry-vars"></a>

* **Key:** a key is a special attribute you need to include when creating lists of elements. Keys are used to identify which items in the list are changed, updated or deleted.
* **Value:** when the value is updated the component perform some action to modify the element.