Revert "chore: base 0.32.x reconciler support (#28)"

This reverts commit 5ead4a6.

Author: mdjastrzebski

bun.lock

@@ -43,17 +43,17 @@
     "typecheck": "tsc --noEmit",
     "test:watch": "jest --watch",
     "validate": "bun run prettier && bun run lint && bun run typecheck && bun run test",
-    "validate:fix": "bun run prettier:fix && bun run lint --fix && bun run typecheck && bun run test -u",
+    "validate:write": "bun run prettier:write && bun run lint --fix && bun run typecheck && bun run test -u",
     "prettier": "prettier --check .",
-    "prettier:fix": "prettier --write .",
+    "prettier:write": "prettier --write .",
     "release": "release-it"
   },
   "dependencies": {
-    "react-reconciler": "~0.32.0",
-    "@types/react-reconciler": "~0.32.0"
+    "react-reconciler": "~0.31.0",
+    "@types/react-reconciler": "~0.31.0"
   },
   "peerDependencies": {
-    "react": "^19.1.0"
+    "react": "^19.0.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.21.0",
@@ -65,7 +65,7 @@
     "eslint-plugin-simple-import-sort": "^12.1.1",
     "jest": "^30.2.0",
     "prettier": "^3.5.2",
-    "react": "^19.1.0",
+    "react": "^19.0.0",
     "release-it": "^18.1.2",
     "ts-jest": "^29.2.6",
     "tsup": "^8.4.0",

package.json

@@ -6,6 +6,3 @@ export const Tag = {
 
 // Container should render as <>{...}</>
 export const CONTAINER_TYPE = "";
-
-// Source: https://github.com/facebook/react/blob/main/packages/shared/ReactSymbols.js#L16
-export const REACT_CONTEXT_TYPE: symbol = Symbol.for("react.context");

src/__tests__/activity.test.tsx

@@ -1,6 +1,6 @@
 export { createRoot } from "./renderer";
 
-export type { Root, RootOptions } from "./renderer";
+export type { Root, RootOptions, ErrorHandler, ErrorInfo } from "./renderer";
 export type { HostElement, HostElementProps, HostNode } from "./host-element";
 export type { JsonElement, JsonNode } from "./render-to-json";
 export type { QueryOptions } from "./query-all";

src/constants.ts

@@ -1,10 +1,9 @@
 import type { ReactElement } from "react";
-import type { Fiber, ReactContext, ReactProviderType } from "react-reconciler";
+import type { Fiber } from "react-reconciler";
 import ReactReconciler from "react-reconciler";
 import { DefaultEventPriority, NoEventPriority } from "react-reconciler/constants";
 
 import { Tag } from "./constants";
-import { REACT_CONTEXT_TYPE } from "./constants";
 import { formatComponentList } from "./utils";
 
 export type Type = string;
@@ -44,13 +43,11 @@ export type TextInstance = {
 
 export type SuspenseInstance = object;
 export type HydratableInstance = object;
-export type FormInstance = object;
 export type PublicInstance = object | TextInstance;
 export type UpdatePayload = unknown;
 export type ChildSet = unknown;
 export type TimeoutHandle = unknown;
 export type NoTimeout = unknown;
-export type TransitionStatus = unknown;
 
 type HostContext = {
   type: string;
@@ -70,13 +67,12 @@ const hostConfig: ReactReconciler.HostConfig<
   TextInstance,
   SuspenseInstance,
   HydratableInstance,
-  FormInstance,
   PublicInstance,
   HostContext,
+  UpdatePayload,
   ChildSet,
   TimeoutHandle,
-  NoTimeout,
-  TransitionStatus
+  NoTimeout
 > = {
   /**
    * The reconciler has two modes: mutation mode and persistent mode. You must specify one of them.
@@ -564,6 +560,8 @@ const hostConfig: ReactReconciler.HostConfig<
    *  be aware that it may change significantly between versions. You're taking on additional maintenance risk by
    * reading from it, and giving up all guarantees if you write something to it.
    */
+  // @ts-expect-error @types/react-reconciler types don't fully match react-reconciler's actual Flow types.
+  // Correctness is verified through tests.
   commitUpdate(
     instance: Instance,
     type: Type,
@@ -688,33 +686,11 @@ const hostConfig: ReactReconciler.HostConfig<
   // -------------------
   supportsHydration: false,
 
-  requestPostPaintCallback(_callback: (endTime: number) => void) {},
-
   NotPendingTransition: null,
 
-  // Based on: https://github.com/facebook/react/blob/main/packages/react-test-renderer/src/ReactFiberConfigTestHost.js#L606
-  HostTransitionContext: {
-    $$typeof: REACT_CONTEXT_TYPE,
-    Consumer: null as unknown as ReactContext<TransitionStatus>,
-    Provider: null as unknown as ReactProviderType<TransitionStatus>,
-    _currentValue: null,
-    _currentValue2: null,
-    _threadCount: 0,
-  },
-
   resetFormInstance(_form: Instance) {},
 
-  trackSchedulerEvent: function (): void {},
-
-  // Based on: https://github.com/facebook/react/blob/main/packages/react-test-renderer/src/ReactFiberConfigTestHost.js#L256
-  resolveEventType: function (): null | string {
-    return null;
-  },
-
-  // Based on: https://github.com/facebook/react/blob/main/packages/react-test-renderer/src/ReactFiberConfigTestHost.js#L259
-  resolveEventTimeStamp: function (): number {
-    return -1.1;
-  },
+  requestPostPaintCallback(_callback: (endTime: number) => void) {},
 };
 
 export const TestReconciler = ReactReconciler(hostConfig);

src/index.ts

@@ -13,13 +13,13 @@ import { TestReconciler } from "./reconciler";
 
 const defaultCreateMockNode = () => ({});
 
-const defaultOnUncaughtError = (error: unknown, errorInfo: BaseErrorInfo) => {
+const defaultOnUncaughtError = (error: unknown, errorInfo: ErrorInfo) => {
   console.error("Uncaught error:", error, errorInfo);
 };
-const defaultOnCaughtError = (error: unknown, errorInfo: BaseErrorInfo) => {
+const defaultOnCaughtError = (error: unknown, errorInfo: ErrorInfo) => {
   console.error("Caught error:", error, errorInfo);
 };
-const defaultOnRecoverableError = (error: unknown, errorInfo: BaseErrorInfo) => {
+const defaultOnRecoverableError = (error: unknown, errorInfo: ErrorInfo) => {
   console.error("Recoverable error:", error, errorInfo);
 };
 
@@ -55,11 +55,13 @@ export type RootOptions = {
   isStrictMode?: boolean;
 };
 
-type ErrorHandler = (error: unknown, errorInfo: BaseErrorInfo) => void;
+/** Callback for handling React errors. */
+export type ErrorHandler = (error: unknown, errorInfo: ErrorInfo) => void;
 
-interface BaseErrorInfo {
-  componentStack?: string;
-}
+/** Error information provided to error handlers. */
+export type ErrorInfo = {
+  componentStack: string;
+};
 
 /**
  * Root instance returned by createRoot. Provides methods to render and unmount components.
@@ -105,8 +107,10 @@ export function createRoot(options?: RootOptions): Root {
     options?.identifierPrefix ?? "",
     options?.onUncaughtError ?? defaultOnUncaughtError,
     options?.onCaughtError ?? defaultOnCaughtError,
+    // @ts-expect-error @types/react-reconciler types don't include onRecoverableError parameter
+    // in the createContainer signature, but react-reconciler's actual Flow types do.
+    // Correctness is verified through tests.
     options?.onRecoverableError ?? defaultOnRecoverableError,
-    () => {}, // onDefaultTransitionIndicator
     null, // transitionCallbacks
   );