diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/guide/01-quickstart.md | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/docs/guide/01-quickstart.md b/docs/guide/01-quickstart.md index 6e8b13d..b678175 100644 --- a/docs/guide/01-quickstart.md +++ b/docs/guide/01-quickstart.md @@ -295,7 +295,7 @@ pub fn update(model: Model, msg: Msg) -> #(Model, effect.Effect(Msg)) { case msg { Increment -> #(Model(..model, count: model.count + 1), get_cat()) Decrement -> #(Model(..model, count: model.count - 1), effect.none()) - GotCat(Ok(cat)) -> #(Model(..model, [cat, ..model.cats]), effect.none()) + GotCat(Ok(cat)) -> #(Model(..model, cats: [cat, ..model.cats]), effect.none()) GotCat(Error(_)) -> #(model, effect.none()) } } @@ -308,6 +308,11 @@ fn get_cat() -> effect.Effect(Msg) { } ``` +**Note**: The `get_cat` function returns an `Effect` that tells the runtime how +to fetch a cat image. It's important to know that the `get_cat` function doesn't +perform the request directly! This is why we need to add the `GotCat` message +variant: the runtime needs to know what to do with the response when it arrives. + This model of managed effects can feel cumbersome at first, but it comes with some benefits. Forcing side effects to produce a message means our message type naturally describes all the ways the world can communicate with our application; as an app |