fix(prebundle): 修复部分小程序不支持语法问题 fix #12414

packages/taro-jd/src/index.ts

@@ -1,4 +1,5 @@
 import type { IPluginContext } from '@tarojs/service'
+import { isString } from '@tarojs/shared'
 
 import JD from './program'
 
@@ -14,4 +15,27 @@ export default (ctx: IPluginContext) => {
       await program.start()
     }
   })
+
+  ctx.modifyRunnerOpts(({ opts }) => {
+    if (!opts?.compiler) return
+
+    if (isString(opts.compiler)) {
+      opts.compiler = {
+        type: opts.compiler
+      }
+    }
+    const { compiler } = opts
+    if (compiler.type === 'webpack5') {
+      compiler.prebundle ||= {}
+      const prebundleOptions = compiler.prebundle
+      if (prebundleOptions.enable === false) return
+      prebundleOptions.swc ||= {
+        jsc: {
+          target: 'es5'
+        }
+      }
+      prebundleOptions.exclude ||= []
+      prebundleOptions.include ||= []
+    }
+  })
 }

packages/taro-swan/src/index.ts

@@ -1,4 +1,5 @@
 import type { IPluginContext } from '@tarojs/service'
+import { isString } from '@tarojs/shared'
 
 import Swan from './program'
 
@@ -14,4 +15,28 @@ export default (ctx: IPluginContext) => {
       await program.start()
     }
   })
+
+  ctx.modifyRunnerOpts(({ opts }) => {
+    if (!opts?.compiler) return
+
+    if (isString(opts.compiler)) {
+      opts.compiler = {
+        type: opts.compiler
+      }
+    }
+    const { compiler } = opts
+    if (compiler.type === 'webpack5') {
+      compiler.prebundle ||= {}
+      const prebundleOptions = compiler.prebundle
+      if (prebundleOptions.enable === false) return
+      prebundleOptions.swc ||= {
+        jsc: {
+          // Note: 由于百度小程序不支持 ES2015，所以这里需要将 ES5 (模拟器环境可无该问题)
+          target: 'es5'
+        }
+      }
+      prebundleOptions.exclude ||= []
+      prebundleOptions.include ||= []
+    }
+  })
 }

packages/taro-webpack5-prebundle/src/prebundle/index.ts

@@ -137,6 +137,7 @@ export default class BasePrebundle<T extends IPrebundleConfig = IPrebundleConfig
 
     await scanImports({
       appPath: this.appPath,
+      chain: this.chain,
       customEsbuildConfig: this.customEsbuildConfig,
       entries,
       include,

packages/taro-webpack5-prebundle/src/prebundle/scanImports.ts

@@ -1,9 +1,11 @@
 import esbuild, { Loader } from 'esbuild'
 import fs from 'fs'
 import path from 'path'
+import Chain from 'webpack-chain'
 
 import {
   externalModule,
+  getDefines,
   getResolve,
   isExclude,
   isOptimizeIncluded,
@@ -26,6 +28,7 @@ import {
 
 interface ScanImportsConfig {
   appPath: string
+  chain: Chain
   entries: string[]
   include: string[]
   exclude: string[]
@@ -34,6 +37,7 @@ interface ScanImportsConfig {
 
 export async function scanImports ({
   appPath,
+  chain,
   entries,
   include = [],
   exclude = [],
@@ -55,6 +59,10 @@ deps: CollectedDeps = new Map()
         format: 'esm',
         loader: defaultEsbuildLoader,
         write: false,
+        define: {
+          ...getDefines(chain),
+          define: 'false'
+        },
         plugins: [
           scanImportsPlugin,
           ...customPlugins