From 0d66a5d0c44a3707b677406b0abc968b8bf03419 Mon Sep 17 00:00:00 2001
From: Cecile Tonglet <cecile.tonglet@cecton.com>
Date: Wed, 20 Jul 2022 14:50:56 +0100
Subject: [PATCH 1/4] Make fn update() re-render the component by default

---
 packages/yew/src/html/component/mod.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/yew/src/html/component/mod.rs b/packages/yew/src/html/component/mod.rs
index 6c405d4ee3b..f603f9f4562 100644
--- a/packages/yew/src/html/component/mod.rs
+++ b/packages/yew/src/html/component/mod.rs
@@ -60,14 +60,18 @@ pub trait Component: Sized + 'static {
     /// to update their state and (optionally) re-render themselves.
     ///
     /// Returned bool indicates whether to render this Component after update.
+    ///
+    /// By default, this function will return true and thus make the component re-render.
     #[allow(unused_variables)]
     fn update(&mut self, ctx: &Context<Self>, msg: Self::Message) -> bool {
-        false
+        true
     }
 
     /// Called when properties passed to the component change
     ///
     /// Returned bool indicates whether to render this Component after changed.
+    ///
+    /// By default, this function will return true and thus make the component re-render.
     #[allow(unused_variables)]
     fn changed(&mut self, ctx: &Context<Self>) -> bool {
         true

From 4187f1e3a67ec71261db484a3bbac011c509bfb4 Mon Sep 17 00:00:00 2001
From: Cecile Tonglet <cecile.tonglet@cecton.com>
Date: Wed, 20 Jul 2022 15:11:04 +0100
Subject: [PATCH 2/4] Add test

---
 packages/yew/src/html/component/mod.rs | 31 ++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/packages/yew/src/html/component/mod.rs b/packages/yew/src/html/component/mod.rs
index f603f9f4562..b90ef78ca9a 100644
--- a/packages/yew/src/html/component/mod.rs
+++ b/packages/yew/src/html/component/mod.rs
@@ -99,3 +99,34 @@ pub trait Component: Sized + 'static {
     #[allow(unused_variables)]
     fn destroy(&mut self, ctx: &Context<Self>) {}
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    struct MyCustomComponent;
+
+    impl Component for MyCustomComponent {
+        type Message = ();
+        type Properties = ();
+
+        fn create(_ctx: &Context<Self>) -> Self {
+            Self
+        }
+
+        fn view(&self, _ctx: &Context<Self>) -> Html {
+            Default::default()
+        }
+    }
+
+    #[test]
+    fn make_sure_component_update_and_changed_rerender() {
+        let mut comp = MyCustomComponent;
+        let ctx = Context {
+            scope: Scope::new(None),
+            props: Rc::new(()),
+        };
+        assert!(comp.update(&ctx, ()));
+        assert!(comp.changed(&ctx));
+    }
+}

From 3d1b49eb51af4e27c205da388bc31528a57eb50f Mon Sep 17 00:00:00 2001
From: Cecile Tonglet <cecile.tonglet@cecton.com>
Date: Wed, 20 Jul 2022 15:22:39 +0100
Subject: [PATCH 3/4] WIP

---
 packages/yew/src/html/component/mod.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/packages/yew/src/html/component/mod.rs b/packages/yew/src/html/component/mod.rs
index 34a3f0d4b6f..63c3bd23435 100644
--- a/packages/yew/src/html/component/mod.rs
+++ b/packages/yew/src/html/component/mod.rs
@@ -292,8 +292,12 @@ mod tests {
         let ctx = Context {
             scope: Scope::new(None),
             props: Rc::new(()),
+            #[cfg(feature = "hydration")]
+            creation_mode: crate::html::RenderMode,
+            #[cfg(feature = "hydration")]
+            prepared_state: None,
         };
-        assert!(comp.update(&ctx, ()));
-        assert!(comp.changed(&ctx));
+        assert!(Component::update(&mut comp, &ctx, ()));
+        assert!(Component::changed(&mut comp, &ctx));
     }
 }

From 0f50ca97cef866c9a4e4581e001db120ec4c3dd4 Mon Sep 17 00:00:00 2001
From: Cecile Tonglet <cecile.tonglet@cecton.com>
Date: Wed, 20 Jul 2022 15:24:56 +0100
Subject: [PATCH 4/4] WIP

---
 packages/yew/src/html/component/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/yew/src/html/component/mod.rs b/packages/yew/src/html/component/mod.rs
index 63c3bd23435..9f212c0527b 100644
--- a/packages/yew/src/html/component/mod.rs
+++ b/packages/yew/src/html/component/mod.rs
@@ -293,7 +293,7 @@ mod tests {
             scope: Scope::new(None),
             props: Rc::new(()),
             #[cfg(feature = "hydration")]
-            creation_mode: crate::html::RenderMode,
+            creation_mode: crate::html::RenderMode::Hydration,
             #[cfg(feature = "hydration")]
             prepared_state: None,
         };