fixme: Problem with Dependency Optimization in pnpm #16293 vitejs/vit…

…e#16293

README.md

@@ -1,16 +1,40 @@
+这个问题未解决，暂时没法用 pnpm 开发。Problem with Dependency Optimization in pnpm #16293 https://github.com/vitejs/vite/issues/16293
+
+
+
 # PowerSync Vite bundling test
 
 原项目：
 https://github.com/powersync-ja/powersync-js/tree/main/demos/example-vite
 
+
+https://vitejs.dev/guide/dep-pre-bundling.html
+Dependency Pre-Bundling 的作用：
+1. CommonJS 转 ESM | CommonJS and UMD compatibility: During development, Vite's dev serves all code as native ESM. Therefore, Vite must convert dependencies that are shipped as CommonJS or UMD into ESM first.
+2. 一堆小文件转成1个文件 | Performance: Vite converts ESM dependencies with many internal modules into a single module to improve subsequent page load performance
+
+出现问题在第1点。为何在使用 pnpm 的时候失效了。
+总的来说，是 Vite 处理 CommonJS 包的问题。pnpm 的链接问题导致的么？？？
+
+
+
+
+pnpm 用这个也没效果
+  "dependenciesMeta": {
+    "uuid": {
+      "injected": true
+    }
+  },
+
 vite 开发环境下会出现如下问题：
 Uncaught SyntaxError: The requested module '/@fs/private/tmp/example-vite/node_modules/can-ndjson-stream/can-ndjson-stream.js?v=1a11c5f8' does not provide an export named 'default' (at AbstractStreamingSyncImplementation.js?v=1a11c5f8:4:8)
 
-1. npm/yarn 环境下通过 optimizeDeps.include 解决问题。
-2. pnpm 未解决
+1. npm/yarn 环境下通过 optimizeDeps.include 解决问题。(需要被链接的依赖被导出为 ESM 格式)
+2. pnpm 未解决。vite pre bundling 的作用就是将 commonjs CJS 自动转换位 ESM，但是失败了？
 
 build 都是没有问题的。
 
+
 ## npm run dev
 npm works by using optimizeDeps.include
 ```
@@ -61,4 +85,6 @@ Failed to resolve dependency: event-iterator, present in 'optimizeDeps.include'
 
 https://github.com/vitejs/vite/issues/16293
 
-未解决 https://github.com/vitejs/vite/issues/11783
+未解决 https://github.com/vitejs/vite/issues/11783
+
+他遇到的是打包出错，开发正常 https://keqingrong.cn/blog/2021-11-24-commonjs-compatibility-with-vite/