update for React 18 (#103)

* update for React 18

* move tests

* fxx tests

* update tests

* prettier fix

* add prop-types dev dep

* socs update

* update codesandbox example for legacy in docs

* update header example link

* link updates in docs

* Publish @r2wc/react-to-web-component v2.0.0-alpha.1

* update links

* update

* update main documentation api link

* update ReactDOMRenderType for legacy

* prettier

---------

Co-authored-by: Bavin Edwards <[email protected]>
Co-authored-by: @r2wc/react-to-web-component[bot]@workflow <Workflow: @r2wc/react-to-web-component[bot]>

README.md

@@ -91,15 +91,13 @@ npm install @r2wc/react-to-web-component
 
 ## External Examples
 
-Greeting example in a [CodePen](https://codepen.io/bavinedwards/pen/jOveaGm)
-
 Greeting example in [CodeSandbox](https://codesandbox.io/s/sample-greeting-app-ts-qwidh9)
 
 Hello, world example (React17) in [CodeSandbox](https://codesandbox.io/s/hello-world-react17-u4l3x1)
 
 Example with all prop types in [CodeSandbox](https://codesandbox.io/p/sandbox/vite-example-with-numerous-types-gjf87o)
 
-R2WC With Vite Header Example in [CodeSandbox](https://codesandbox.io/p/sandbox/header-example-e4x25q)
+R2WC With Vite Header Example in [CodeSandbox](https://codesandbox.io/p/sandbox/r2wc-header-example-vqzfgo)
 
 ## External Blog Posts
 
@@ -109,9 +107,9 @@ R2WC with Create React App (CRA) [View Post](https://www.bitovi.com/blog/how-to-
 
 ## How it works
 
-Check out our [full API documentation](../../docs/api.md).
+Check out our [full API documentation](https://github.com/bitovi/react-to-web-component/blob/main/docs/api.md).
 
-`r2wc` creates a constructor function whose prototype is a [Proxy](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy). This acts as a trap for any property set on instances of the custom element. When a property is set, the proxy:
+Under the hood, `r2wc` creates a `CustomElementConstructor` with custom getters/setters and life cycle methods that keep track of the props that you have defined. When a property is set, its custom setter:
 
 - re-renders the React component inside the custom element.
 - creates an enumerable getter / setter on the instance

packages/legacy/README.md

@@ -106,7 +106,7 @@ R2WC with Create React App (CRA) [View Post](https://www.bitovi.com/blog/how-to-
 
 ## How it works
 
-Check out our [full API documentation](../../docs/api.md).
+Check out our [full API documentation](https://github.com/bitovi/react-to-web-component/blob/main/docs/api.md).
 
 # We want to hear from you.
 

packages/legacy/src/react-to-webcomponent.ts

@@ -3,11 +3,7 @@ import type { R2WCOptions } from "@r2wc/core"
 import r2wcCore from "@r2wc/core"
 
 interface ReactType {
-  createElement: (
-    type: any,
-    data: any,
-    children?: any,
-  ) => React.ReactElement | null
+  createElement: (type: any, data: any, children?: any) => React.ReactElement
 }
 
 interface ReactDOMRootRootType {
@@ -25,7 +21,7 @@ interface ReactDOMRootType {
 interface ReactDOMRenderType {
   unmountComponentAtNode: (container: Element | DocumentFragment) => boolean
   render: (
-    element: React.ReactElement | null,
+    element: React.ReactElement,
     container: ReactDOM.Container | null,
   ) => unknown
 }
@@ -37,7 +33,7 @@ interface Context<Props> {
 }
 
 /**
- * Converts a React component into a webcomponent by wrapping it in a Proxy object.
+ * Converts a React component into a webcomponent by mounting it into an HTMLElement container.
  * @param {ReactComponent}
  * @param {React}
  * @param {ReactDOM}

packages/react-to-web-component/README.md

@@ -91,8 +91,11 @@ npm install @r2wc/react-to-web-component
 
 ## Examples
 
-* [Greeting](https://codesandbox.io/s/greeting-react-17-u4l3x1)
-* [All the Props](https://codesandbox.io/s/all-the-props-react-17-x09rxo)
+* [Greeting](https://codesandbox.io/s/greeting-md5oih)
+* [All the Props](https://codesandbox.io/s/all-the-props-n8z5hv)
+* [Header Demo](https://codesandbox.io/s/example-header-blog-7k313l)
+* [MUI Button](https://codesandbox.io/s/example-mui-button-qwidh9)
+* [Checklist Demo](https://codesandbox.io/s/example-checklist-blog-y3nqwx)
 
 ## Blog Posts
 
@@ -102,7 +105,17 @@ R2WC with Create React App (CRA) [View Post](https://www.bitovi.com/blog/how-to-
 
 ## How it works
 
-Check out our [full API documentation](../../docs/api.md).
+Check out our [full API documentation](https://github.com/bitovi/react-to-web-component/blob/main/docs/api.md).
+
+Under the hood, `r2wc` creates a `CustomElementConstructor` with custom getters/setters and life cycle methods that keep track of the props that you have defined. When a property is set, its custom setter:
+
+- re-renders the React component inside the custom element.
+- creates an enumerable getter / setter on the instance to save the set value and avoid hitting the proxy in the future.
+
+Also:
+
+- Enumerable properties and values on the custom element are used as the `props` passed to the React component.
+- The React component is not rendered until the custom element is inserted into the page.
 
 # We want to hear from you.
 

packages/react-to-web-component/package.json

@@ -45,11 +45,12 @@
     "@r2wc/core": "^1.0.0"
   },
   "devDependencies": {
-    "@types/react": "^17.0.0",
-    "@types/react-dom": "^17.0.0"
+    "@types/react": "^18.0.0",
+    "@types/react-dom": "^18.0.0",
+    "prop-types": "^15.8.1"
   },
   "peerDependencies": {
-    "react": "^16.0.0 || ^17.0.0",
-    "react-dom": "^16.0.0 || ^17.0.0"
+    "react": "^18.0.0",
+    "react-dom": "^18.0.0"
   }
 }

packages/react-to-web-component/src/react-to-web-component.test.tsx

@@ -1,6 +1,8 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import { describe, it, expect, assert } from "vitest"
 import matchers from "@testing-library/jest-dom/matchers"
+import React from "react"
+import PropTypes from "prop-types"
 
 import r2wc from "./react-to-web-component"
 
@@ -14,7 +16,7 @@ const Greeting: React.FC<{ name: string }> = ({ name }) => (
   <h1>Hello, {name}</h1>
 )
 
-describe("react-to-web-component", () => {
+describe("react-to-web-component 1", () => {
   it("basics with react", () => {
     const MyWelcome = r2wc(Greeting)
     customElements.define("my-welcome", MyWelcome)
@@ -26,6 +28,71 @@ describe("react-to-web-component", () => {
     expect(myWelcome.nodeName).toEqual("MY-WELCOME")
   })
 
+  it("works with props array", async () => {
+    function TestComponent({ name }: { name: string }) {
+      return <div>hello, {name}</div>
+    }
+
+    const TestElement = r2wc(TestComponent, { props: ["name"] })
+
+    customElements.define("test-hello", TestElement)
+
+    const body = document.body
+    body.innerHTML = "<test-hello name='Bavin'></test-hello>"
+
+    await flushPromises()
+
+    const div = body.querySelector("div")
+    expect(div?.textContent).toBe("hello, Bavin")
+  })
+
+  it("works with proptypes", async () => {
+    function WithProptypes({ name }: { name: string }) {
+      return <div>hello, {name}</div>
+    }
+
+    WithProptypes.propTypes = {
+      name: PropTypes.string.isRequired,
+    }
+
+    const WithPropTypesElement = r2wc(WithProptypes)
+
+    customElements.define("with-proptypes", WithPropTypesElement)
+
+    const body = document.body
+    body.innerHTML = "<with-proptypes name='Bavin'></with-proptypes>"
+
+    await flushPromises()
+
+    const div = body.querySelector("div")
+    expect(div?.textContent).toBe("hello, Bavin")
+  })
+
+  it("works with class components", async () => {
+    class TestClassComponent extends React.Component<{ name: string }> {
+      render() {
+        return <div>hello, {this.props.name}</div>
+      }
+    }
+
+    class TestClassElement extends r2wc(TestClassComponent, {
+      props: ["name"],
+    }) {}
+
+    customElements.define("test-class", TestClassElement)
+
+    const body = document.body
+    body.innerHTML = "<test-class name='Bavin'></test-class>"
+
+    await flushPromises()
+
+    const div = body.querySelector("div")
+    const testClassEl = body.querySelector("test-class")
+
+    expect(testClassEl).toBeInstanceOf(TestClassElement)
+    expect(div?.textContent).toBe("hello, Bavin")
+  })
+
   it("works with shadow DOM `options.shadow === 'open'`", async () => {
     expect.assertions(5)
 

packages/react-to-web-component/src/react-to-web-component.ts

@@ -1,12 +1,13 @@
 import type { R2WCOptions } from "@r2wc/core"
+import type { Root } from "react-dom/client"
 
 import React from "react"
-import ReactDOM from "react-dom"
+import { createRoot } from "react-dom/client"
 
 import r2wcCore from "@r2wc/core"
 
 interface Context<Props extends object> {
-  container: HTMLElement
+  root: Root
   ReactComponent: React.ComponentType<Props>
 }
 
@@ -15,27 +16,27 @@ function mount<Props extends object>(
   ReactComponent: React.ComponentType<Props>,
   props: Props,
 ): Context<Props> {
-  const element = React.createElement(ReactComponent, props)
+  const root = createRoot(container)
 
-  ReactDOM.render(element, container)
+  const element = React.createElement(ReactComponent, props)
+  root.render(element)
 
   return {
-    container,
+    root,
     ReactComponent,
   }
 }
 
 function update<Props extends object>(
-  { container, ReactComponent }: Context<Props>,
+  { root, ReactComponent }: Context<Props>,
   props: Props,
 ): void {
   const element = React.createElement(ReactComponent, props)
-
-  ReactDOM.render(element, container)
+  root.render(element)
 }
 
-function unmount<Props extends object>({ container }: Context<Props>): void {
-  ReactDOM.unmountComponentAtNode(container)
+function unmount<Props extends object>({ root }: Context<Props>): void {
+  root.unmount()
 }
 
 export default function r2wc<Props extends object>(