mdx: remove inferral of development from NODE_ENV

Now only `@mdx-js/node-loader` will switch to development, but based on which
condition is used (so do `--conditions development` to get development mode).

Closes GH-2367.

docs/guides/mdx-on-demand.mdx

@@ -30,10 +30,6 @@ On the server:
 import {compile} from '@mdx-js/mdx'
 
 const code = String(await compile('# hi', {
-  development: false
-  // ^-- Generate code for production.
-  // `false` if you use `/jsx-runtime` on client, `true` if you use
-  // `/jsx-dev-runtime`.
   outputFormat: 'function-body',
   /* …otherOptions */
 }))
@@ -93,10 +89,6 @@ export default function Page({code}) {
 export async function getStaticProps() {
   const code = String(
     await compile('# hi', {
-      development: false,
-      // ^-- Generate code for production.
-      // `false` if you use `/jsx-runtime` on client, `true` if you use
-      // `/jsx-dev-runtime`.
       outputFormat: 'function-body',
       /* …otherOptions */
     })

docs/migrating/v2.mdx

@@ -386,7 +386,7 @@ You can update your code as follows:
 
     const components = {/* … */}
     const value = '# hi'
-    const {default: Content} = await evaluate(value, {...provider, ...runtime, development: false})
+    const {default: Content} = await evaluate(value, {...provider, ...runtime})
 
     export default function () {
       return <Content components={components} />

packages/mdx/lib/core.js

@@ -52,7 +52,6 @@ import {rehypeRecma} from './plugin/rehype-recma.js'
 import {rehypeRemoveRaw} from './plugin/rehype-remove-raw.js'
 import {remarkMarkAndUnravel} from './plugin/remark-mark-and-unravel.js'
 import {nodeTypes} from './node-types.js'
-import {development as defaultDevelopment} from '#condition'
 
 const removedOptions = [
   'compilers',
@@ -91,10 +90,6 @@ export function createProcessor(options) {
     SourceMapGenerator,
     ...rest
   } = options || {}
-  const dev =
-    development === null || development === undefined
-      ? defaultDevelopment
-      : development
   let index = -1
 
   while (++index < removedOptions.length) {
@@ -144,13 +139,13 @@ export function createProcessor(options) {
     .use(rehypeRecma, {elementAttributeNameCase, stylePropertyNameCase})
     .use(recmaDocument, {...rest, outputFormat})
     .use(recmaJsxRewrite, {
-      development: dev,
+      development,
       providerImportSource,
       outputFormat
     })
 
   if (!jsx) {
-    pipeline.use(recmaJsxBuild, {development: dev, outputFormat})
+    pipeline.use(recmaJsxBuild, {development, outputFormat})
   }
 
   pipeline.use(recmaStringify, {SourceMapGenerator}).use(recmaPlugins || [])

packages/mdx/package.json

@@ -37,12 +37,6 @@
     "./internal-extnames-to-regex": "./lib/util/extnames-to-regex.js",
     "./internal-resolve-evaluate-options": "./lib/util/resolve-evaluate-options.js"
   },
-  "imports": {
-    "#condition": {
-      "node": "./lib/condition.node.js",
-      "default": "./lib/condition.default.js"
-    }
-  },
   "files": [
     "lib/",
     "index.d.ts",

packages/mdx/readme.md

@@ -789,8 +789,6 @@ Typically, `import` (or `export … from`) do not work here.
 They can be compiled to dynamic `import()` by passing
 [`options.useDynamicImport`][usedynamicimport].
 
-> ☢️ **Danger**: you likely must set `development: boolean`.
-
 ###### `file`
 
 See [`compile`][compile].
@@ -814,7 +812,7 @@ exceptions:
 ###### `options.Fragment`
 
 These options are required: `Fragment` always, when `development: true`
-then `jsx` and `jsxs`, when `development: false` then `jsxDEV`.
+then `jsxDEV`, when `development: false` then `jsx` and `jsxs`.
 They come from an automatic JSX runtime that you must import yourself.
 
 <details>
@@ -823,11 +821,7 @@ They come from an automatic JSX runtime that you must import yourself.
 ```tsx
 import * as runtime from 'react/jsx-runtime'
 
-const {default: Content} = await evaluate('# hi', {
-  development: false,
-  ...otherOptions,
-  ...runtime
-})
+const {default: Content} = await evaluate('# hi', {...otherOptions, ...runtime})
 ```
 
 </details>
@@ -844,7 +838,6 @@ import * as provider from '@mdx-js/react'
 import * as runtime from 'react/jsx-runtime'
 
 const {default: Content} = await evaluate('# hi', {
-  development: false,
   ...otherOptions,
   ...provider,
   ...runtime
@@ -868,7 +861,7 @@ Assuming the contents of `example.mdx` from [§ Use][use] was in `file`, then:
 import * as runtime from 'react/jsx-runtime'
 import {evaluate} from '@mdx-js/mdx'
 
-console.log(await evaluate(file, {...runtime, development: false}))
+console.log(await evaluate(file, runtime))
 ```
 
 …yields:
@@ -930,10 +923,7 @@ On the server:
 ```tsx
 import {compile} from '@mdx-js/mdx'
 
-const code = String(await compile('# hi', {
-  development: false,
-  outputFormat: 'function-body'
-}))
+const code = String(await compile('# hi', {outputFormat: 'function-body'}))
 // To do: send `code` to the client somehow.
 ```
 

packages/node-loader/lib/condition.development.js

@@ -0,0 +1 @@
+export const development = true

packages/node-loader/lib/index.js

@@ -6,6 +6,7 @@ import fs from 'node:fs/promises'
 import {createFormatAwareProcessors} from '@mdx-js/mdx/internal-create-format-aware-processors'
 import {extnamesToRegex} from '@mdx-js/mdx/internal-extnames-to-regex'
 import {VFile} from 'vfile'
+import {development as defaultDevelopment} from '#condition'
 
 /**
  * Create a loader to handle markdown and MDX.
@@ -17,7 +18,10 @@ import {VFile} from 'vfile'
  */
 export function createLoader(options) {
   const options_ = options || {}
-  const {extnames, process} = createFormatAwareProcessors(options_)
+  const {extnames, process} = createFormatAwareProcessors({
+    development: defaultDevelopment,
+    ...options_
+  })
   const regex = extnamesToRegex(extnames)
 
   return {load}

packages/node-loader/package.json

@@ -30,6 +30,12 @@
   "type": "module",
   "sideEffects": false,
   "exports": "./index.js",
+  "imports": {
+    "#condition": {
+      "development": "./lib/condition.development.js",
+      "default": "./lib/condition.default.js"
+    }
+  },
   "files": [
     "lib/",
     "index.d.ts",