feat(jsx): base for supporting more runtimes (#236)

Co-authored-by: Kent C. Dodds <[email protected]>

README.md

@@ -44,7 +44,7 @@ everything for you.
   </summary>
 
 [MDX](https://mdxjs.com/) enables you to combine terse markdown syntax for your
-content with the power of React components. For content-heavy sites, writing the
+content with the power of JSX components. For content-heavy sites, writing the
 content with straight-up HTML can be annoyingly verbose. Often people solve this
 using a WSYWIG editor, but too often those fall short in mapping the writer's
 intent to HTML. Many people prefer using markdown to express their content
@@ -56,8 +56,8 @@ to insert an element that JavaScript targets (which is annoyingly indirect), or
 you can use an `iframe` or something.
 
 As previously stated, [MDX](https://mdxjs.com/) enables you to combine terse
-markdown syntax for your content with the power of React components. So you can
-import a React component and render it within the markdown itself. It's the best
+markdown syntax for your content with the power of JSX components. So you can
+import a JSX component and render it within the markdown itself. It's the best
 of both worlds.
 
 </details>
@@ -141,6 +141,16 @@ bundling. So it's best suited for SSR frameworks like Remix/Next.
 
 </details>
 
+<details>
+  <summary>
+    <strong>
+      "Can I use this other JSX libraries other than React?"
+    </strong>
+  </summary>
+
+Yes! If JSX runtime you want to use is mentioned here - https://mdxjs.com/docs/getting-started/#jsx, it's guaranteed to work. Libraries, such as `hono` which has `react` compatible API also works. Check to [Other JSX runtimes](#other-jsx-runtimes) to get started.
+</details>
+
 <details>
   <summary>
     <strong>
@@ -770,9 +780,84 @@ export const MDXComponent: React.FC<{
 
 ### Known Issues
 
+### Other JSX runtimes
+JSX runtimes mentioned [here](https://mdxjs.com/docs/getting-started/#jsx) are guaranteed to be supported, however any JSX runtime should work without problem, as long as they export their own jsx runtime. For example, `hono` is not mentioned here, but as it has `react` compatible API, it can be used without any issues.
+
+To do so, you will have to pass a configuration object and use JSX Component factory.
+```tsx
+const getMDX = (source) => {
+  return bundleMDX({
+    source,
+    jsxConfig: {
+      jsxLib: {
+        varName: 'HonoJSX',
+        package: 'hono/jsx',
+      },
+      jsxDom: {
+        varName: 'HonoDOM',
+        package: 'hono/jsx/dom',
+      },
+      jsxRuntime: {
+        varName: '_jsx_runtime',
+        package: 'hono/jsx/jsx-runtime',
+      },
+    }
+  });
+}
+
+// ...
+
+import { getMDXComponent } from "mdx-bundler/client/jsx";
+
+import * as HonoJSX from "hono/jsx";
+import * as HonoDOM from "hono/jsx/dom";
+import * as _jsx_runtime from "hono/jsx/jsx-runtime";
+const jsxConfig = {
+  HonoJSX,
+  HonoDOM,
+  _jsx_runtime
+};
+
+export const MDXComponent: React.FC<{
+  code: string;
+}> = ({ code }) => {
+  const Component = useMemo(
+    () => getMDXComponent(code, jsxConfig),
+    [code],
+  );
+
+  return (
+    <Component components={{ Text: ({ children }) => <p>{children}</p> }} />
+  );
+};
+```
+
+To use it with others, adjust `jsxConfig` passed to bundler.
+```ts
+const jsxConfig = {
+  jsxLib: {
+    varName: 'HonoJSX',
+    package: 'hono/jsx',
+  },
+  jsxDom: {
+    varName: 'HonoDOM',
+    package: 'hono/jsx/dom',
+  },
+  jsxRuntime: {
+    varName: '_jsx_runtime',
+    package: 'hono/jsx/jsx-runtime',
+  },
+}
+```
+and to `getMDXComponent`
+```ts
+const jsxConfig = { HonoJSX, HonoDOM, _jsx_runtime };
+```
+
+
 #### Cloudflare Workers
 
-We'd _love_ for this to work in cloudflare workers. Unfortunately cloudflares
+We'd _love_ for this to work in cloudflare workers. Unfortunately cloudflare workers
 have two limitations that prevent `mdx-bundler` from working in that
 environment:
 

client/index.js

@@ -1 +1 @@
-module.exports = require('../dist/client')
+module.exports = require('../dist/client/index.js')

client/jsx.js

@@ -0,0 +1 @@
+module.exports = require('../dist/client/jsx')

client/package.json

@@ -1,5 +1,9 @@
 {
   "type": "commonjs",
   "main": "./index.js",
-  "types": "./index.d.ts"
+  "types": "./index.d.ts",
+  "exports": {
+    "react": "./react.js",
+    "jsx": "./jsx.js"
+  }
 }

client/react.js

@@ -0,0 +1 @@
+module.exports = require('../dist/client/index.js')

package.json

@@ -53,7 +53,9 @@
     "esbuild": "0.*"
   },
   "devDependencies": {
+    "@testing-library/preact": "3.2.4",
     "@testing-library/react": "^14.1.0",
+    "@testing-library/vue": "8.1.0",
     "@types/jsdom": "^21.1.5",
     "@types/mdx": "^2.0.10",
     "@types/react": "^18.2.37",
@@ -63,15 +65,18 @@
     "c8": "^8.0.1",
     "cross-env": "^7.0.3",
     "esbuild": "^0.19.5",
+    "hono": "4.6.14",
     "jsdom": "^22.1.0",
     "kcd-scripts": "^14.0.1",
     "left-pad": "^1.3.0",
     "mdx-test-data": "^1.0.1",
+    "preact": "10.25.3",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "remark-mdx-images": "^3.0.0",
     "typescript": "^5.2.2",
-    "uvu": "^0.5.6"
+    "uvu": "^0.5.6",
+    "vue": "3.5.13"
   },
   "eslintConfig": {
     "extends": "./node_modules/kcd-scripts/eslint.js",

src/__tests__/hono.js

@@ -0,0 +1,83 @@
+import './setup-tests.js'
+import { Hono } from "hono";
+/* eslint-disable import/no-unresolved --
+ * imports paths are there in node_modules/hono/package.json
+ * but it doesn't get resolved
+ */
+import * as HonoJSX from "hono/jsx";
+import * as HonoDOM from "hono/jsx/dom";
+import * as _jsx_runtime from "hono/jsx/jsx-runtime";
+/* eslint-enable import/no-unresolved */
+import {suite} from 'uvu'
+import * as assert from 'uvu/assert'
+import {bundleMDX} from '../index.js'
+import {getMDXComponent} from '../client/jsx.js'
+
+const test = suite("hono");
+
+const jsxBundlerConfig = {
+  jsxLib: {
+    varName: 'HonoJSX',
+    package: 'hono/jsx',
+  },
+  jsxDom: {
+    varName: 'HonoDOM',
+    package: 'hono/jsx/dom',
+  },
+  jsxRuntime: {
+    varName: '_jsx_runtime',
+    package: 'hono/jsx/jsx-runtime',
+  },
+}
+const jsxComponentConfig = { HonoJSX, HonoDOM, _jsx_runtime  }
+
+const mdxSource = `
+---
+title: Example Post
+published: 2021-02-13
+description: This is some meta-data
+---
+import Demo from './demo'
+
+# This is the title
+
+Here's a **neat** demo:
+<Demo />
+`.trim();
+
+const demoTsx = `
+export default function Demo() {
+  return <div>mdx-bundler with hono's runtime!</div>
+}
+`.trim();
+
+
+test('smoke test for hono', async () => {
+
+  const result = await bundleMDX({
+    source: mdxSource,
+    jsxConfig: jsxBundlerConfig,
+    files: {
+      './demo.tsx': demoTsx
+    }
+  });
+
+  /** @param {HonoJSX.DOMAttributes} props */
+  const SpanBold = ({ children }) => {
+    return HonoJSX.createElement('span', { className: "strong" }, children)
+  }
+
+  const app = new Hono()
+    .get("/", (c) => {
+      const Component = getMDXComponent(result.code, jsxComponentConfig);
+      return c.html(HonoJSX.jsx(Component, { components: { strong: SpanBold } }).toString());
+    });
+
+    const req = new Request("http://localhost/");
+    const res = await app.fetch(req);
+    assert.equal(await res.text(), `<h1>This is the title</h1>
+<p>Here&#39;s a <span class="strong">neat</span> demo:</p>
+<div>mdx-bundler with hono&#39;s runtime!</div>`);
+})
+
+test.run()

src/__tests__/index.js

@@ -1,15 +1,16 @@
 import './setup-tests.js'
 import path from 'path'
-import {test} from 'uvu'
+import {suite} from 'uvu'
 import * as assert from 'uvu/assert'
 import React from 'react'
 import rtl from '@testing-library/react'
 import leftPad from 'left-pad'
 import remarkMdxImages from 'remark-mdx-images'
 import {VFile} from 'vfile'
 import {bundleMDX} from '../index.js'
-import {getMDXComponent, getMDXExport} from '../client.js'
+import {getMDXComponent, getMDXExport} from '../client/react.js'
 
+const test = suite("react");
 const {render} = rtl
 
 test('smoke test', async () => {

src/__tests__/preact.js

@@ -0,0 +1,88 @@
+import './setup-tests.js'
+import * as Preact from "preact";
+import * as PreactDOM from "preact/compat";
+import * as _jsx_runtime from 'preact/jsx-runtime';
+import {suite} from 'uvu'
+import * as assert from 'uvu/assert'
+import { render } from '@testing-library/preact'
+import {bundleMDX} from '../index.js'
+import {getMDXComponent} from '../client/jsx.js'
+
+const test = suite("preact");
+
+const jsxBundlerConfig = {
+  jsxLib: {
+    varName: 'Preact',
+    package: 'preact',
+  },
+  jsxDom: {
+    varName: 'PreactDom',
+    package: 'preact/compat',
+  },
+  jsxRuntime: {
+    varName: '_jsx_runtime',
+    package: 'preact/jsx-runtime',
+  },
+}
+const jsxComponentConfig = { Preact, PreactDOM, _jsx_runtime  }
+
+const mdxSource = `
+---
+title: Example Post
+published: 2021-02-13
+description: This is some meta-data
+---
+import Demo from './demo'
+
+# This is the title
+
+Here's a **neat** demo:
+<Demo />
+`.trim();
+
+const demoTsx = `
+export default function Demo() {
+  return <div>mdx-bundler with Preact's runtime!</div>
+}
+`.trim();
+
+
+test('smoke test for preact', async () => {
+
+  const result = await bundleMDX({
+    source: mdxSource,
+    jsxConfig: jsxBundlerConfig,
+    files: {
+      './demo.tsx': demoTsx
+    }
+  });
+
+  /** 
+   * @type {import('preact').FunctionComponent<{ components?: Record<string, any> }>}
+   */
+  const Component = getMDXComponent(result.code, jsxComponentConfig)
+
+  /** @type {Preact.FunctionComponent<{ children:Preact.ComponentChildren }>} props */
+  const SpanBold = ({children}) => {
+    return Preact.createElement('span', { className: "strong" }, children)
+  }
+
+  assert.equal(result.frontmatter, {
+    title: 'Example Post',
+    published: new Date('2021-02-13'),
+    description: 'This is some meta-data',
+  })
+
+  const {container} = render(
+    Preact.h(Component, {components: {strong: SpanBold}})
+  )
+
+  assert.equal(
+    container.innerHTML,
+    `<h1>This is the title</h1>
+<p>Here's a <span class="strong">neat</span> demo:</p>
+<div>mdx-bundler with Preact's runtime!</div>`,
+  )
+})
+
+test.run()