Add support for JSX dev runtime

Closes Gh-15.

Reviewed-by: Christian Murphy <[email protected]>
Reviewed-by: Titus Wormer <[email protected]>

Author: remcohaszing

jsx-dev-runtime.js

@@ -0,0 +1,20 @@
+/**
+ * @typedef {import('xast').Element} Element
+ * @typedef {import('xast').Root} Root
+ * @typedef {import('./lib/index.js').XChild} XChild
+ * @typedef {import('./lib/runtime.js').JSXProps} JSXProps
+ */
+
+import {jsx} from './jsx-runtime.js'
+
+export {Fragment} from './jsx-runtime.js'
+
+// eslint-disable-next-line unicorn/prefer-export-from
+export const jsxDEV =
+  /**
+   * @type {{
+   *   (name: null|undefined, props: {children?: XChild}, ...unused: unknown[]): Root
+   *   (name: string, props: JSXProps, ...unused: unknown[]): Element
+   * }}
+   */
+  (jsx)

package.json

@@ -33,12 +33,15 @@
     "lib/",
     "index.d.ts",
     "index.js",
+    "jsx-dev-runtime.d.ts",
+    "jsx-dev-runtime.js",
     "jsx-runtime.d.ts",
     "jsx-runtime.js"
   ],
   "exports": {
     ".": "./index.js",
     "./index.js": "./index.js",
+    "./jsx-dev-runtime": "./jsx-dev-runtime.js",
     "./jsx-runtime": "./jsx-runtime.js"
   },
   "dependencies": {

script/generate-jsx.js

@@ -38,10 +38,26 @@ fs.writeFileSync(
         // @ts-ignore Hush, `2021` is fine.
         {sourceType: 'module', ecmaVersion: 2021}
       ),
-      {runtime: 'automatic', importSource: '.'}
+      {runtime: 'automatic', importSource: 'xastscript'}
     )
     // @ts-expect-error Some bug in `to-js`
-  ).value.replace(/\/jsx-runtime(?=["'])/g, './lib/runtime.js')
+  ).value
+)
+
+fs.writeFileSync(
+  path.join('test', 'jsx-build-jsx-automatic-development.js'),
+  toJs(
+    // @ts-expect-error it’s a program.
+    buildJsx(
+      // @ts-expect-error Acorn nodes are assignable to ESTree nodes.
+      Parser.extend(acornJsx()).parse(
+        doc.replace(/'name'/, "'jsx (estree-util-build-jsx, automatic)'"),
+        {sourceType: 'module', ecmaVersion: 2021}
+      ),
+      {runtime: 'automatic', importSource: 'xastscript', development: true}
+    )
+    // @ts-expect-error Some bug in `to-js`
+  ).value
 )
 
 fs.writeFileSync(
@@ -57,14 +73,25 @@ fs.writeFileSync(
 fs.writeFileSync(
   path.join('test', 'jsx-babel-automatic.js'),
   // @ts-expect-error Result always given.
-  babel
-    .transformSync(doc.replace(/'name'/, "'jsx (babel, automatic)'"), {
-      plugins: [
-        [
-          '@babel/plugin-transform-react-jsx',
-          {runtime: 'automatic', importSource: '.'}
-        ]
+  babel.transformSync(doc.replace(/'name'/, "'jsx (babel, automatic)'"), {
+    plugins: [
+      [
+        '@babel/plugin-transform-react-jsx',
+        {runtime: 'automatic', importSource: 'xastscript'}
       ]
-    })
-    .code.replace(/\/jsx-runtime(?=["'])/g, './lib/runtime.js')
+    ]
+  }).code
+)
+
+fs.writeFileSync(
+  path.join('test', 'jsx-babel-automatic-development.js'),
+  // @ts-expect-error Result always given.
+  babel.transformSync(doc.replace(/'name'/, "'jsx (babel, automatic)'"), {
+    plugins: [
+      [
+        '@babel/plugin-transform-react-jsx',
+        {runtime: 'automatic', importSource: 'xastscript', development: true}
+      ]
+    ]
+  }).code
 )

test-d/automatic.tsx

@@ -1,5 +1,5 @@
 /* @jsxRuntime automatic */
-/* @jsxImportSource .. */
+/* @jsxImportSource xastscript */
 
 import {expectType, expectError} from 'tsd'
 import type {Root, Element} from 'xast'

tsconfig.json

@@ -11,8 +11,7 @@
   "compilerOptions": {
     "target": "ES2020",
     "lib": ["ES2020"],
-    "module": "ES2020",
-    "moduleResolution": "node",
+    "module": "Node16",
     "allowJs": true,
     "checkJs": true,
     "declaration": true,