Fix types and exports of the package

.changeset/strong-otters-brush.md

@@ -0,0 +1,11 @@
+---
+"single-spa-react": major
+---
+
+### Fixed
+
+- Enhanced compatibility with various bundlers and TypeScript `moduleResolution` strategies. The package's export patterns have been refined to address issues previously encountered with different bundling tools, ensuring more consistent and reliable integration across diverse build environments. Additionally, TypeScript type definitions have been improved, enhancing type safety and developer experience in varied TypeScript setups.
+
+### BREAKING CHANGES
+
+- The changes in export patterns / types may require updates in how projects import from `single-spa-react/*`.

.gitignore

@@ -2,5 +2,4 @@ node_modules/
 .DS_Store
 lib/
 yarn-error.log
-coverage
-parcel/
+coverage

package.json

@@ -8,28 +8,39 @@
   "exports": {
     "./package.json": "./package.json",
     ".": {
-      "import": "./lib/esm/single-spa-react.js",
-      "require": "./lib/cjs/single-spa-react.cjs"
+      "import": {
+        "types": "./types/single-spa-react.d.ts",
+        "default": "./lib/esm/single-spa-react.js"
+      },
+      "require": {
+        "types": "./types/single-spa-react.d.cts",
+        "default": "./lib/cjs/single-spa-react.cjs"
+      }
     },
     "./parcel": {
-      "import": "./lib/esm/parcel.js",
-      "require": "./lib/cjs/parcel.cjs"
+      "import": {
+        "types": "./types/parcel/index.d.ts",
+        "default": "./lib/esm/parcel.js"
+      },
+      "require": {
+        "types": "./types/parcel/index.d.cts",
+        "default": "./lib/cjs/parcel.cjs"
+      }
     }
   },
+  "types": "types/single-spa-react.d.cts",
   "files": [
     "lib",
     "parcel",
-    "types/single-spa-react.d.ts",
+    "types",
     "README.md"
   ],
   "tsd": {
     "directory": "src"
   },
-  "types": "types/single-spa-react.d.ts",
   "scripts": {
     "build": "concurrently pnpm:build:*",
     "build:rollup": "rollup -c",
-    "build:types": "rimraf parcel && copyfiles -f types/parcel/index.d.ts ./parcel",
     "lint": "eslint src",
     "test": "concurrently pnpm:test:*",
     "test:browser": "cross-env BABEL_ENV=test NODE_OPTIONS=--experimental-vm-modules jest --coverage",

parcel/README.md

@@ -0,0 +1,20 @@
+# Parcel Folder
+
+## Overview
+This folder contains a `package.json` stub that redirects module resolutions, following the `package-json-redirects` strategy.
+
+## Why It's Here
+Serves as a compatibility layer for Node 10, which does not support the `exports` field in `package.json`. A separate `package.json` with `main` and `types` fields directs Node 10's resolution strategy to the appropriate files.
+
+```json
+{
+  "main": "./lib/cjs/parcel.cjs",
+  "types": "./types/parcel/index.d.cts"
+}
+```
+
+## How It Works
+When Node 10 attempts to import from this folder, it consults the `main` and `types` fields in `package.json` to locate the actual implementation and types files. This facilitates keeping those files in separate subfolders while making them accessible to older Node versions.
+
+## Reference
+For more detailed information and examples, see [this GitHub repository](https://github.com/andrewbranch/example-subpath-exports-ts-compat/tree/main/examples/node_modules/package-json-redirects).

parcel/package.json

@@ -0,0 +1,4 @@
+{
+  "main": "../lib/umd/parcel.js",
+  "types": "../types/parcel/index.d.cts"
+}

src/single-spa-react.js

@@ -48,7 +48,7 @@ const defaultOpts = {
   unmountResolves: {},
 };
 
-export default function singleSpaReact(userOpts) {
+function singleSpaReact(userOpts) {
   if (typeof userOpts !== "object") {
     throw new Error(`single-spa-react requires a configuration object`);
   }
@@ -375,3 +375,5 @@ function createSingleSpaRoot(opts) {
 
   return SingleSpaRoot;
 }
+
+export default singleSpaReact;

types/parcel/index.d.cts

@@ -0,0 +1,36 @@
+import * as React from "react";
+import {
+  ParcelConfig,
+  ParcelProps,
+  Parcel as SingleSpaParcel,
+} from "single-spa";
+
+interface ParcelCompProps<ExtraProps = {}> {
+  config: ParcelConfig<ExtraProps>;
+  mountParcel?: (
+    parcelConfig: ParcelConfig,
+    parcelProps: ParcelProps & ExtraProps
+  ) => SingleSpaParcel;
+  wrapWith?: string;
+  wrapStyle?: React.CSSProperties;
+  wrapClassName?: string;
+  appendTo?: HTMLElement;
+  parcelDidMount?: () => any;
+  handleError?: (err: Error) => any;
+  [extraProp: string]: any;
+}
+
+interface ParcelState {
+  hasError: boolean;
+}
+
+declare class Parcel<ExtraProps = {}> extends React.Component<
+  ParcelCompProps<ExtraProps>,
+  ParcelState
+> {}
+
+export = Parcel;
+
+declare namespace Parcel {
+  export { ParcelCompProps, ParcelState };
+}

types/single-spa-react.d.cts

@@ -0,0 +1,63 @@
+import * as React from "react";
+import { AppProps, CustomProps, LifeCycleFn } from "single-spa";
+
+declare const SingleSpaContext: React.Context<CustomProps & AppProps>;
+
+type DeprecatedRenderTypes =
+  | "createBlockingRoot"
+  | "unstable_createRoot"
+  | "unstable_createBlockingRoot";
+
+type LegacyRenderType = "hydrate" | "render";
+
+type RenderType = "createRoot" | "hydrateRoot" | LegacyRenderType;
+
+interface SingleSpaReactOpts<RootComponentProps> {
+  React: any;
+  ReactDOM?: {
+    [T in LegacyRenderType]?: any;
+  };
+  ReactDOMClient?: {
+    [T in RenderType]?: any;
+  };
+  rootComponent?:
+    | React.ComponentClass<RootComponentProps, any>
+    | React.FunctionComponent<RootComponentProps>;
+  loadRootComponent?: (
+    props?: RootComponentProps
+  ) => Promise<React.ElementType<typeof props>>;
+  errorBoundary?: (
+    err: Error,
+    errInfo: React.ErrorInfo,
+    props: RootComponentProps
+  ) => React.ReactElement;
+  errorBoundaryClass?: React.ComponentClass<RootComponentProps>;
+  parcelCanUpdate?: boolean;
+  suppressComponentDidCatchWarning?: boolean;
+  domElementGetter?: (props: RootComponentProps) => HTMLElement;
+  renderType?: RenderType | (() => RenderType);
+}
+
+interface ReactAppOrParcel<ExtraProps> {
+  bootstrap: LifeCycleFn<ExtraProps>;
+  mount: LifeCycleFn<ExtraProps>;
+  unmount: LifeCycleFn<ExtraProps>;
+  update?: LifeCycleFn<ExtraProps>;
+}
+
+declare function singleSpaReact<ExtraProps = {}>(
+  opts: SingleSpaReactOpts<ExtraProps & AppProps>
+): ReactAppOrParcel<ExtraProps>;
+
+export = singleSpaReact;
+
+declare namespace singleSpaReact {
+  export {
+    SingleSpaContext,
+    DeprecatedRenderTypes,
+    LegacyRenderType,
+    RenderType,
+    SingleSpaReactOpts,
+    ReactAppOrParcel,
+  };
+}