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@taro-minify-pack/plugin-async-pack

v0.1.2

Published

异步加载主包代码,优化主包体积(仅包含异步模块`js`文件)

Downloads

183

Readme

@taro-minify-pack/plugin-async-pack

异步加载主包代码,优化主包体积(仅包含异步模块js文件)

✨ 功能特性

  • 主包体积优化:将动态导入的模块自动拆分到异步分包,有效减少主包体积
  • 灵活配置:可自定义异步分包名称前缀和数量
  • 自动化处理:自动修改小程序配置文件,无需手动操作
  • 性能提升:减少小程序启动时间,提升用户体验

📦 安装

npm install @taro-minify-pack/plugin-async-pack

yarn 安装

yarn add @taro-minify-pack/plugin-async-pack

pnpm 安装

pnpm add @taro-minify-pack/plugin-async-pack

⚙️ 配置

babel配置

// babel-preset-taro 更多选项和默认值:
// https://docs.taro.zone/docs/next/babel-config
module.exports = {
    presets: [
        ['taro', {
            framework: 'react',
            ts: true,
            compiler: 'webpack5',
            // 在原有基础上添加这个配置即可
            'dynamic-import-node': process.env.TARO_ENV !== 'weapp', 
        }]
    ]
}

Taro 配置

// config/index.js
module.exports = {
    compiler: {
        type: 'webpack5',
        prebundle: {
            // 关闭预打包,这里和分包异步编译有冲突
            enable: false,
        }
    },
    plugins: [
        ['@taro-minify-pack/plugin-async-pack', {
            // 异步分包名前缀,默认为 'dynamic-common'
            dynamicPackageNamePrefix: 'dynamic-common',
            // 异步分包数量,默认为 1
            dynamicPackageCount: 2
        }],
    ],
};

🚀 使用

基本使用

// 动态导入模块
const module = await import('./dynamic-module')

React 组件懒加载

import { lazy, Suspense } from 'react'

const DynamicComponent = lazy(() => import('./DynamicComponent'))

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <DynamicComponent />
    </Suspense>
  )
}

Vue 组件懒加载

<template>
  <view class="index">
    <Suspense>
      <template #default>
         <AsyncComponent/>
      </template>
      <template #fallback>
        <view>loading...</view>
      </template>
    </Suspense>
  </view>
</template>

<script setup>
import {defineAsyncComponent, ref} from 'vue'
const AsyncComponent = defineAsyncComponent(() => import('./async-component')
)
</script>

📝 工作原理

  1. Webpack 配置修改

    • 覆盖 splitChunks 规则,使commonvendors只处理同步模块
    • 配置 chunkFilename 生成规则,确保异步模块正确输出到指定分包
    • 修改 miniCssExtractPlugin 配置,确保异步模块的样式文件也能正确拆分到指定目录
    • 修改 runtime.js 输出,确保异步模块的js文件能通过require.async正确引入
  2. 样式处理

    • 为每个异步分包生成样式组件
    • 自动收集该分包下的所有样式文件并通过 @import 引入主包app.wxss同步引入
  3. 小程序配置修改

    • 自动修改 app.json,添加异步分包配置

⚠️ 注意事项

  1. 仅支持微信小程序:当前插件仅适用于微信小程序环境
  2. 关闭预打包:必须关闭 Taro 的预打包功能,否则可能与异步分包功能冲突
  3. Babel 配置:需要正确配置 Babel 的 dynamic-import-node 选项
  4. Webpack 版本:仅支持 Webpack 5 编译器
  5. 分包数量:根据项目实际情况配置 dynamicPackageCount,过多的分包可能会影响性能
  6. 版本要求:插件版本0.0.5-alpha.x尝试实现样式文件异步加载受微信机制影响存在无法优化的「闪屏样式丢失」,故0.0.5及以后版本不支持样式文件异步加载。

🔧 配置选项

| 选项名 | 类型 | 默认值 | 描述 | |----------------------------|----------|--------------------|----------| | dynamicPackageNamePrefix | string | 'dynamic-common' | 异步分包名称前缀 | | dynamicPackageCount | number | 1 | 异步分包数量 |

🤝 常见问题

1. 异步模块没有被拆分到分包?

  • 请检查是否正确配置了 dynamic-import-node 选项
  • 确保已关闭 Taro 的预打包功能
  • 确认使用了 Webpack 5 编译器
  • 确保代码中使用了 import() 动态导入语法

2. 异步组件的样式没有加载?

  • 检查是否有编译错误或警告信息

3. 配置后编译失败?

  • 请检查配置选项是否正确
  • 确认 Taro 版本与插件版本兼容
  • 查看编译日志,排查具体错误原因

4. 页面加载时出现白屏?

  • 请检查是否正确使用了 Suspense 组件包裹异步组件
  • 确保异步组件的导入路径正确
  • 检查网络请求是否正常

5. 分包数量配置后没有生效?

  • 请确保 dynamicPackageCount 配置的值大于0
  • 检查是否有足够的动态导入模块来拆分到多个分包

📄 许可证

MIT License

🤝 贡献

欢迎提交 Issue 和 Pull Request!

该插件是 @taro-minify-pack 系列插件的一部分,致力于提供完整的 Taro 项目优化解决方案。