fix: dynamic import module to avoid breaking in browser (#129)

README.md

@@ -249,7 +249,7 @@ module.exports = {
 ```ts
 import { transform } from 'unplugin-vue2-script-setup'
 
-const Vue2SFC = transform(`
+const Vue2SFC = await transform(`
 <template>
   <!-- ... -->
 </template>

jest.js

@@ -15,8 +15,8 @@ function requireVueJest() {
 }
 
 module.exports = {
-  process(source, filename, ...args) {
-    const transformed = transform(source, filename)
+  async process(source, filename, ...args) {
+    const transformed = await transform(source, filename)
     const code = transformed ? transformed.code : source
     return requireVueJest().process.call(this, code, filename, ...args)
   },

package.json

@@ -49,11 +49,6 @@
       "require": "./dist/webpack.js",
       "import": "./dist/webpack.mjs",
       "types": "./webpack.d.ts"
-    },
-    "./lib": {
-      "require": "./dist/lib.js",
-      "import": "./dist/lib.mjs",
-      "types": "./lib.d.ts"
     }
   },
   "main": "dist/index.js",
@@ -101,6 +96,7 @@
     "@types/babel__core": "^7.1.18",
     "@types/estree": "^0.0.51",
     "@types/node": "^17.0.21",
+    "@types/pug": "^2.0.6",
     "@types/ws": "^8.5.0",
     "@vue/composition-api": "^1.4.6",
     "@vue/runtime-dom": "^3.2.31",
@@ -117,9 +113,9 @@
     "vitest": "0.5.4"
   },
   "peerDependencies": {
-    "pug": "^3.0.2",
     "@vue/composition-api": "^1.4.3",
-    "@vue/runtime-dom": "^3.2.31"
+    "@vue/runtime-dom": "^3.2.31",
+    "pug": "^3.0.2"
   },
   "peerDependenciesMeta": {
     "pug": {

rollup.config.js

@@ -13,8 +13,7 @@ const entries = [
   'src/vite.ts',
   'src/rollup.ts',
   'src/esbuild.ts',
-  'src/nuxt.ts',
-  'src/lib.ts',
+  'src/nuxt.ts'
 ]
 
 const dtsEntries = [

src/core/parseSFC.ts

@@ -1,6 +1,5 @@
 /* eslint-disable one-var */
 /* eslint-disable @typescript-eslint/no-namespace */
-import { createRequire } from 'module'
 import { notNullish, partition } from '@antfu/utils'
 import type { Program } from '@babel/types'
 import type { ParserPlugin } from '@babel/parser'
@@ -83,14 +82,6 @@ const BUILD_IN_DIRECTIVES = new Set([
   // 'ref',
 ])
 
-function getRequire() {
-  return (
-    (typeof require === 'function')
-      ? require
-      : createRequire(import.meta.url)
-  )
-}
-
 function getComponents(node: TemplateChildNode): string[] {
   const current
     = node.type === NodeTypes.ELEMENT && node.tagType === ElementTypes.COMPONENT
@@ -282,11 +273,11 @@ function getBabelParserOptions(lang: string | null | undefined) {
     plugins,
   }
 }
-export function parseSFC(
+export async function parseSFC(
   code: string,
   id?: string,
   options?: ScriptSetupTransformOptions,
-): ParsedSFC {
+): Promise<ParsedSFC> {
   const elementChildren = baseParse(code, parserOptions).children.flatMap(x =>
     x.type === NodeTypes.ELEMENT && x.tagType === ElementTypes.ELEMENT
       ? [x]
@@ -376,7 +367,7 @@ export function parseSFC(
             && p.value.content === 'pug',
       )
         ? baseParse(
-          getRequire()('pug').compile(
+          (await import('pug')).compile(
             templateNode.children.map(x => x.loc.source).join(''),
             {
               filename: id,

src/core/transform.ts

@@ -15,12 +15,12 @@ export function shouldTransform(code: string, id: string, options?: ScriptSetupT
   return (options?.reactivityTransform && shouldTransformRefSugar(code)) || scriptSetupRE.test(code)
 }
 
-export function transform(input: string, id: string, options?: ScriptSetupTransformOptions): TransformResult {
+export async function transform(input: string, id: string, options?: ScriptSetupTransformOptions): Promise<TransformResult> {
   if (!shouldTransform(input, id, options))
     return null
   const resolved = resolveOptions(options)
   if (id.endsWith('.vue') || id.includes('.vue?vue'))
-    return transformVue(input, id, resolved)
+    return await transformVue(input, id, resolved)
   else
     return transformNonVue(input, id, resolved)
 }
@@ -36,10 +36,10 @@ function transformNonVue(input: string, id: string, options: ResolvedOptions): T
   return null
 }
 
-function transformVue(input: string, id: string, options: ResolvedOptions): TransformResult {
+async function transformVue(input: string, id: string, options: ResolvedOptions): Promise<TransformResult> {
   const s = new MagicString(input)
 
-  const sfc = parseSFC(input, id)
+  const sfc = await parseSFC(input, id)
 
   if (options.reactivityTransform)
     transformSfcRefSugar(sfc, options)

src/index.ts

@@ -17,9 +17,9 @@ export const unplugin = createUnplugin<PluginOptions>((options = {}) => {
     transformInclude(id) {
       return filter(id)
     },
-    transform(code, id) {
+    async transform(code, id) {
       try {
-        return transform(code, id, options)
+        return await transform(code, id, options)
       }
       catch (e: any) {
         this.error(e)

test/errors.test.ts

@@ -2,8 +2,8 @@ import { describe, expect, it, vi } from 'vitest'
 import { transform as t } from '../src'
 
 describe('errors', () => {
-  it('langs', () => {
-    expect(() =>
+  it('langs', async() => {
+    await expect(() =>
       t(`
 <script setup>
 const a = 1
@@ -12,54 +12,51 @@ const a = 1
 <script lang="ts">
 export default {}
 </script>
-`, 'Lang.vue'))
-      .toThrowError('<script setup> language must be the same as <script>')
+`, 'Lang.vue')).rejects.toThrowError('<script setup> language must be the same as <script>')
   })
 
-  it('defineProps', () => {
-    expect(() =>
+  it('defineProps', async() => {
+    await expect(() =>
       t(`
 <script setup>
 defineProps()
 const a = defineProps()
 </script>
 `, 'DefineProps.vue'))
-      .toThrowError('duplicate defineProps() call')
+      .rejects.toThrowError('duplicate defineProps() call')
   })
 
-  it('top-level await', () => {
-    expect(() =>
+  it('top-level await', async() => {
+    await expect(() =>
       t(`
 <script setup>
 defineProps()
 await something()
 </script>
 `, 'TopLevel.vue'))
-      .toThrowError('top-level await is not supported in Vue 2')
+      .rejects.toThrowError('top-level await is not supported in Vue 2')
 
-    expect(() =>
+    await expect(() =>
       t(`
 <script setup>
 defineProps()
 const {data} = await something()
 </script>
 `, 'TopLevel.vue'))
-      .toThrowError('top-level await is not supported in Vue 2')
+      .rejects.toThrowError('top-level await is not supported in Vue 2')
   })
 
-  it('ref sugar', () => {
+  it('ref sugar', async() => {
     const consoleWarnMock = vi.spyOn(console, 'warn')
 
-    expect(() =>
-      t(`
+    await t(`
 <script setup>
 defineProps()
 const a = async () => {
   await something()
 }
 </script>
-`, 'App.vue'))
-      .not.toThrow()
+    `, 'App.vue')
 
     consoleWarnMock.mockRestore()
   })

test/transform.test.ts

@@ -18,10 +18,10 @@ describe('transform', () => {
     for (const file of files) {
       it(file.replace(/\\/g, '/'), async() => {
         const fixture = await fs.readFile(resolve(root, file), 'utf-8')
-        const result = transform(fixture, file, { reactivityTransform: true })?.code || fixture
+        const result = (await transform(fixture, file, { reactivityTransform: true }))?.code || fixture
         expect(result).toMatchSnapshot()
 
-        const result2 = transform(result, file, { reactivityTransform: true })?.code || result
+        const result2 = (await transform(result, file, { reactivityTransform: true }))?.code || result
         expect(result).toEqual(result2)
       })
     }