From c11289f872785bac589f4f98619c498e62ee9b40 Mon Sep 17 00:00:00 2001
From: jdecroock <decroockjovi@gmail.com>
Date: Sat, 24 May 2025 11:35:42 +0200
Subject: [PATCH 1/2] Remove lifecycles from core

---
 compat/src/index.d.ts   |  7 -------
 demo/people/profile.tsx |  6 ++++--
 src/diff/index.js       | 21 ---------------------
 src/index-5.d.ts        |  7 -------
 src/index.d.ts          |  7 -------
 test/ts/preact.tsx      | 17 -----------------
 6 files changed, 4 insertions(+), 61 deletions(-)

diff --git a/compat/src/index.d.ts b/compat/src/index.d.ts
index 093c7d0970..fa73cbe7ff 100644
--- a/compat/src/index.d.ts
+++ b/compat/src/index.d.ts
@@ -28,21 +28,14 @@ declare namespace preact {
 	}
 
 	export interface Component<P = {}, S = {}> {
-		componentWillMount?(): void;
 		componentDidMount?(): void;
 		componentWillUnmount?(): void;
 		getChildContext?(): object;
-		componentWillReceiveProps?(nextProps: Readonly<P>, nextContext: any): void;
 		shouldComponentUpdate?(
 			nextProps: Readonly<P>,
 			nextState: Readonly<S>,
 			nextContext: any
 		): boolean;
-		componentWillUpdate?(
-			nextProps: Readonly<P>,
-			nextState: Readonly<S>,
-			nextContext: any
-		): void;
 		getSnapshotBeforeUpdate?(oldProps: Readonly<P>, oldState: Readonly<S>): any;
 		componentDidUpdate?(
 			previousProps: Readonly<P>,
diff --git a/demo/people/profile.tsx b/demo/people/profile.tsx
index fb18f568f5..5d5f900859 100644
--- a/demo/people/profile.tsx
+++ b/demo/people/profile.tsx
@@ -14,8 +14,10 @@ export class Profile extends Component<ProfileProps> {
 		this.id = this.props.route;
 	}
 
-	componentWillReceiveProps(props: ProfileProps) {
-		this.id = props.route;
+	componentDidUpdate(prevProps: ProfileProps) {
+		if (prevProps.route !== this.props.route) {
+			this.id = this.props.route;
+		}
 	}
 
 	render() {
diff --git a/src/diff/index.js b/src/diff/index.js
index d9a62cbae5..19e5e4f0d8 100644
--- a/src/diff/index.js
+++ b/src/diff/index.js
@@ -147,27 +147,10 @@ export function diff(
 
 			// Invoke pre-render lifecycle methods
 			if (isNew) {
-				if (
-					isClassComponent &&
-					newType.getDerivedStateFromProps == NULL &&
-					c.componentWillMount != NULL
-				) {
-					c.componentWillMount();
-				}
-
 				if (isClassComponent && c.componentDidMount != NULL) {
 					c._renderCallbacks.push(c.componentDidMount);
 				}
 			} else {
-				if (
-					isClassComponent &&
-					newType.getDerivedStateFromProps == NULL &&
-					newProps !== oldProps &&
-					c.componentWillReceiveProps != NULL
-				) {
-					c.componentWillReceiveProps(newProps, componentContext);
-				}
-
 				if (
 					(!c._force &&
 						c.shouldComponentUpdate != NULL &&
@@ -207,10 +190,6 @@ export function diff(
 					break outer;
 				}
 
-				if (c.componentWillUpdate != NULL) {
-					c.componentWillUpdate(newProps, c._nextState, componentContext);
-				}
-
 				if (isClassComponent && c.componentDidUpdate != NULL) {
 					c._renderCallbacks.push(() => {
 						c.componentDidUpdate(oldProps, oldState, snapshot);
diff --git a/src/index-5.d.ts b/src/index-5.d.ts
index 1431b01f30..78614c2010 100644
--- a/src/index-5.d.ts
+++ b/src/index-5.d.ts
@@ -111,21 +111,14 @@ export type AnyComponent<P = {}, S = {}> =
 	| ComponentConstructor<P, S>;
 
 export interface Component<P = {}, S = {}> {
-	componentWillMount?(): void;
 	componentDidMount?(): void;
 	componentWillUnmount?(): void;
 	getChildContext?(): object;
-	componentWillReceiveProps?(nextProps: Readonly<P>, nextContext: any): void;
 	shouldComponentUpdate?(
 		nextProps: Readonly<P>,
 		nextState: Readonly<S>,
 		nextContext: any
 	): boolean;
-	componentWillUpdate?(
-		nextProps: Readonly<P>,
-		nextState: Readonly<S>,
-		nextContext: any
-	): void;
 	getSnapshotBeforeUpdate?(oldProps: Readonly<P>, oldState: Readonly<S>): any;
 	componentDidUpdate?(
 		previousProps: Readonly<P>,
diff --git a/src/index.d.ts b/src/index.d.ts
index e6b8fd549e..e5417b68a1 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -111,21 +111,14 @@ export type AnyComponent<P = {}, S = {}> =
 	| ComponentConstructor<P, S>;
 
 export interface Component<P = {}, S = {}> {
-	componentWillMount?(): void;
 	componentDidMount?(): void;
 	componentWillUnmount?(): void;
 	getChildContext?(): object;
-	componentWillReceiveProps?(nextProps: Readonly<P>, nextContext: any): void;
 	shouldComponentUpdate?(
 		nextProps: Readonly<P>,
 		nextState: Readonly<S>,
 		nextContext: any
 	): boolean;
-	componentWillUpdate?(
-		nextProps: Readonly<P>,
-		nextState: Readonly<S>,
-		nextContext: any
-	): void;
 	getSnapshotBeforeUpdate?(oldProps: Readonly<P>, oldState: Readonly<S>): any;
 	componentDidUpdate?(
 		previousProps: Readonly<P>,
diff --git a/test/ts/preact.tsx b/test/ts/preact.tsx
index c0fe2cfc08..43ce44427f 100644
--- a/test/ts/preact.tsx
+++ b/test/ts/preact.tsx
@@ -202,10 +202,6 @@ class ComponentWithLifecycle extends Component<DummyProps, DummyState> {
 		return <div>Hi</div>;
 	}
 
-	componentWillMount() {
-		console.log('componentWillMount');
-	}
-
 	componentDidMount() {
 		console.log('componentDidMount');
 	}
@@ -214,11 +210,6 @@ class ComponentWithLifecycle extends Component<DummyProps, DummyState> {
 		console.log('componentWillUnmount');
 	}
 
-	componentWillReceiveProps(nextProps: DummyProps, nextCtx: any) {
-		const { initialInput } = nextProps;
-		console.log('componentWillReceiveProps', initialInput, nextCtx);
-	}
-
 	shouldComponentUpdate(
 		nextProps: DummyProps,
 		nextState: DummyState,
@@ -227,14 +218,6 @@ class ComponentWithLifecycle extends Component<DummyProps, DummyState> {
 		return false;
 	}
 
-	componentWillUpdate(
-		nextProps: DummyProps,
-		nextState: DummyState,
-		nextContext: any
-	) {
-		console.log('componentWillUpdate', nextProps, nextState, nextContext);
-	}
-
 	componentDidUpdate(
 		previousProps: DummyProps,
 		previousState: DummyState,

From 230e39a11933104a5ba016dbc18245803f94a9c8 Mon Sep 17 00:00:00 2001
From: Jovi De Croock <decroockjovi@gmail.com>
Date: Sat, 24 May 2025 12:00:11 +0200
Subject: [PATCH 2/2] Temp add willUpdate back

---
 src/diff/index.js | 4 ++++
 src/index-5.d.ts  | 5 +++++
 src/index.d.ts    | 5 +++++
 3 files changed, 14 insertions(+)

diff --git a/src/diff/index.js b/src/diff/index.js
index 19e5e4f0d8..b9031ad40d 100644
--- a/src/diff/index.js
+++ b/src/diff/index.js
@@ -190,6 +190,10 @@ export function diff(
 					break outer;
 				}
 
+				if (c.componentWillUpdate != NULL) {
+					c.componentWillUpdate(newProps, c._nextState, componentContext);
+				}
+
 				if (isClassComponent && c.componentDidUpdate != NULL) {
 					c._renderCallbacks.push(() => {
 						c.componentDidUpdate(oldProps, oldState, snapshot);
diff --git a/src/index-5.d.ts b/src/index-5.d.ts
index 78614c2010..b9ab2035b0 100644
--- a/src/index-5.d.ts
+++ b/src/index-5.d.ts
@@ -119,6 +119,11 @@ export interface Component<P = {}, S = {}> {
 		nextState: Readonly<S>,
 		nextContext: any
 	): boolean;
+	componentWillUpdate?(
+		nextProps: Readonly<P>,
+		nextState: Readonly<S>,
+		nextContext: any
+	): void;
 	getSnapshotBeforeUpdate?(oldProps: Readonly<P>, oldState: Readonly<S>): any;
 	componentDidUpdate?(
 		previousProps: Readonly<P>,
diff --git a/src/index.d.ts b/src/index.d.ts
index e5417b68a1..d9d9eaf393 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -119,6 +119,11 @@ export interface Component<P = {}, S = {}> {
 		nextState: Readonly<S>,
 		nextContext: any
 	): boolean;
+	componentWillUpdate?(
+		nextProps: Readonly<P>,
+		nextState: Readonly<S>,
+		nextContext: any
+	): void;
 	getSnapshotBeforeUpdate?(oldProps: Readonly<P>, oldState: Readonly<S>): any;
 	componentDidUpdate?(
 		previousProps: Readonly<P>,