NestJS 中使用esm

先说结论

修改tsconfig 如下，修改 module/moduleResolution 这两个字段

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{
  "compilerOptions": {
    "module": "Node16", // +
    "moduleResolution": "Node", // +
    "declaration": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "target": "es2017",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./",
    "allowJs": true,
    "incremental": true
  }
}

安装 @brillout/load-module npm包，如下使用

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const MyEsmClass = await loadModule('my-esm-class')
const myobj = new MyEsmClass()

相关issue

  1. 为什么ts中无法直接使用 await import()
    1. https://github.com/nestjs/nest/issues/10047
    2. https://github.com/microsoft/TypeScript/issues/43329