Merge branch 'dev' into brophdawg11/revalidating-fetcher-controller

Author: brophdawg11

.changeset/disallow-return-undefined-type.md

@@ -0,0 +1,5 @@
+---
+"@remix-run/router": patch
+---
+
+Enhance `LoaderFunction`/`ActionFunction` return type to prevent `undefined` from being a valid return value

.changeset/fetcher-submission-revalidation.md

@@ -40,6 +40,9 @@ jobs:
       - name: 🏗 Build
         run: yarn build
 
+      - name: 🔬 Lint
+        run: yarn lint
+
       - name: 🧪 Run tests
         run: yarn test
 

.changeset/fix-fragments-ids.md

@@ -104,6 +104,7 @@
 - kentcdodds
 - kiliman
 - kkirsche
+- kno-raziel
 - koojaa
 - KostiantynPopovych
 - KutnerUri
@@ -142,6 +143,7 @@
 - ms10596
 - ned-park
 - nilubisan
+- nnhjs
 - noisypigeon
 - Obi-Dann
 - omar-moquete
@@ -195,9 +197,9 @@
 - WalkAlone0325
 - willemarcel
 - williamsdyyz
+- willsawyerrrr
 - xavier-lc
 - xcsnowcity
 - yionr
 - yuleicul
 - zheng-chuang
-- nnhjs

.changeset/initialize-lazy-errors.md

@@ -38,7 +38,7 @@ For example, imagine a UI where the sidebar lists projects, and the main view di
 +-----------------+----------------------------┘
 ```
 
-When the user clicks a checkbox, the submission goes to the action to change the state of the task. Instead of creating a "loading state" we want to create an "optimistic UI" that will **immediately** update the checkbox to appear checked even though the server hasn't processed it yet. In the checkbox component, we can use `fetcher.submission`:
+When the user clicks a checkbox, the submission goes to the action to change the state of the task. Instead of creating a "loading state" we want to create an "optimistic UI" that will **immediately** update the checkbox to appear checked even though the server hasn't processed it yet. In the checkbox component, we can use `fetcher.formData`:
 
 ```tsx
 function Task({ task }) {