status-im
/
reagent
mirror of https://github.com/status-im/reagent.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

A few added details on ratoms updates.

This commit is contained in:
jmlsf 2018-02-26 21:15:52 -08:00 committed by GitHub
parent 65ef4f17ef
commit 71c9ca111a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
docs/FAQ/ComponentNotRerendering.md
View File

@ -14,8 +14,9 @@ We'll deal with these two cases seperately.
If a ratom changes but your Component doesn't update, then the gotchas to look out for are:
1. Make sure you are using a `reagent.core/atom` (i.e. a Reagent ratom) instead of a normal `clojure.core/atom`. Carefully check the `require` at the top of the `ns`. Components are only reactive with respect to Reagent ratoms. They don't react to changes in a Clojure atom.
2. Make sure you actually `deref` your ratom (e.g, @app-state) inside of your component. It is a common mistake for people to forget the leading `@`.
3. Make sure your ratom will survive a rerender. Either declare it as a global var, or use a form-2 component. [Read this](https://github.com/reagent-project/reagent-cookbook/tree/master/basics/component-level-state) if you want to understand why.
2. Make sure you actually `deref` your ratom (e.g, @app-state) during the render function of your component. It is a common mistake for people to forget the leading `@`. Note that derefs that happen outside of the render function (such as during event handlers) do not make your component reactive to that ratom.
3a. Make sure your ratom will survive a rerender. Either declare it as a global var, or use a form-2 or form-3 component. [Read this](https://github.com/reagent-project/reagent-cookbook/tree/master/basics/component-level-state) if you want to understand why.
3b. If you put your ratom in a form-2 or form-3 component, be sure you are calling that function using \[square brackets\], not \(parenthesis\).
4. Make sure to `deref` your ratom outside of a seq or wrap that seq in a `doall`. See this [related issue](https://github.com/reagent-project/reagent/issues/18).
### Props Change