Document "gotcha" regarding `dispatch`.

The added remark might help people to save some time.
6 years ago · 79a848dbc2
parent 5dda05213e
commit 79a848dbc2
1 changed files with 2 additions and 1 deletions
--- a/site/content/tutorial/05-events/04-component-events/text.md
+++ b/site/content/tutorial/05-events/04-component-events/text.md
@ -19,3 +19,4 @@ Components can also dispatch events. To do so, they must create an event dispatc
 ```

 > `createEventDispatcher` must be called when the component is first instantiated — you can't do it later inside e.g. a `setTimeout` callback. This links `dispatch` to the component instance.
+> `dispatch` can only be called once the component has been mounted. It is therefore not possible to call `dispatch` from the `beforeUpdate` lifecycle.