构建失败并出现解决错误

Question

我正在尝试在一个纤细的组件中设置 socket.io-client。

文档说我可以做到import { io } from 'socket.io-client'。

但是当我尝试使用 serve 目标运行应用程序时，命令失败并显示以下日志：

Bundle complete. Watching for file changes...
Bundling...
'bufferutil' is imported by bufferutil?commonjs-external, but could not be resolved – treating it as an external dependency
'utf-8-validate' is imported by utf-8-validate?commonjs-external, but could not be resolved – treating it as an external dependency
Circular dependency: node_modules\util\util.js -> node_modules\util\node_modules\inherits\inherits.js -> node_modules\util\util.js
Circular dependency: node_modules\util\util.js -> node_modules\util\node_modules\inherits\inherits.js -> C:\Users\munda\Documents\upwork\upwork-gameshow\node_modules\util\util.js?commonjs-proxy -> node_modules\util\util.js
@rollup/plugin-typescript: Rollup 'sourcemap' option must be set to generate source maps.
No name was provided for external module 'tty' in output.globals – guessing 'tty'
No name was provided for external module 'os' in output.globals – guessing 'os'
No name was provided for external module 'fs' in output.globals – guessing 'fs'
No name was provided for external module 'child_process' in output.globals – guessing 'require$$0'
No name was provided for external module 'http' in output.globals – guessing 'require$$1'
No name was provided for external module 'https' in output.globals – guessing 'require$$2'
No name was provided for external module 'net' in output.globals – guessing 'net'
No name was provided for external module 'tls' in output.globals – guessing 'tls'
No name was provided for external module 'crypto' in output.globals – guessing 'require$$0$3'
No name was provided for external module 'zlib' in output.globals – guessing 'zlib'
No name was provided for external module 'bufferutil' in output.globals – guessing 'require$$1$1'
No name was provided for external module 'stream' in output.globals – guessing 'require$$0$2'
No name was provided for external module 'utf-8-validate' in output.globals – guessing 'require$$0$1'
Creating a browser bundle that depends on Node.js built-in modules ("tty", "os", "http", "https", "zlib" and "stream"). You might need to include https://github.com/snowpackjs/rollup-plugin-polyfill-node

生成应用程序的步骤：

1. 使用yarn create nx-workspace 启动一个 nx 工作区
2. 使用yarn add @nxext/svelte 安装svelte 生成器，链接：https://nx.dev/community#:~:text=the%20Nx%20workflow-,%40nxext/svelte,-Nx%20plugin%20to
3. 使用安装的生成器生成svelte 应用程序。
4. 在组件中添加socket.io 客户端代码（文档中提到的基本套接字初始化）。
5. 由于我的服务器和客户端不会托管在同一个域上，因此添加 import { io } from 'socket.io-client' 并使用 const socket = io(SERVER_URL) 初始化套接字（在我的例子中是 http://localhost:3000）
6. 使用yarn socket.io-client安装socket.io客户端。
7. 使用nx run-many --target=serve --all --parallel 运行serve 目标，手指交叉。

结果：上面提到的日志。

我错过了什么？

Answer 1

我需要安装以下缺少的依赖项：

• bufferutil
• utf-8-validate

一个简单的yarn add bufferutil utf-8-validate 为我修复了它。这在docs for socket.io-client package 或socket.io 官方文档网站中有所提及。

这确实修复了我的 PC（Windows）上的构建，但我无法在 mac 上运行相同的东西。我尝试删除node_modules和yarn.lock，重新运行yarn。

最后我不得不走 CDN 路线。

我就是这样做的：

1. 在函数中移动套接字初始化逻辑。

<script>
  ...
  const initialiseSocket = () => {
    socket = io('http://localhost:3000');

    socket.on('messages', (data) => {
      //...
    });
  }
</script>

1. 添加一个 svelte:head 标记以从 CDN 加载 socket-io.client 并将函数传递给此脚本的 on:load。

<svelte:head>
  <script
    src="https://cdn.socket.io/4.2.0/socket.io.min.js"
    integrity="sha384-PiBR5S00EtOj2Lto9Uu81cmoyZqR57XcOna1oAuVuIEjzj0wpqDVfD0JA9eXlRsj"
    crossorigin="anonymous"
    on:load={initialiseSocket}></script>
</svelte:head>