Guide to exporting (and using) JSDoc annotations in TypeScript NPM packages

Looking to enhance my skills in creating npm packages with TypeScript. I have a small project available at https://www.npmjs.com/package/lynda-copy-course/, and so far, the project structure is successful in:

  • being executable from the command line after npm install -g lynda-copy-course
  • working seamlessly within another JavaScript/TypeScript project after npm install -s lynda-copy-course
  • making its type definitions accessible to projects that use it as an npm dependency

The only challenge remaining is that when other projects consume this package, they do not recognize the JSDoc style comments present in the source code.

How can I set up my project (package.json, tsconfig.json, etc.) to ensure that consuming packages can interpret my JSDoc comments?

Current content of my package.json:

{
  "name": "lynda-copy-course",
  "version": "2.1.7",
  "bin": {
    "lynda-copy-course": "./bin/lynda-copy-course.js"
  },
  "main": "./src/index.js",
  "types": "./src/index.d.ts",
  "dependencies": {
    "inquirer": "^3.0.6",
    "lodash": "^4.17.4",
    "minimist": "^1.2.0",
    "ncp": "^2.0.0",
    "sqlite3": "^3.1.8"
  }
}

Current configuration in my tsconfig.json:

{
    "compilerOptions": {
        "declaration": true,
        "module": "commonjs",
        "noImplicitAny": true,
        "removeComments": true,
        "preserveConstEnums": true,
        "sourceMap": true
    },
    "include": [
        "src/**/*",
        "bin/**/*"
    ],
    "exclude": [
        "node_modules",
        "**/*.spec.ts"
    ],
    "compileOnSave": true,
    "typeAcquisition": {
        "enable": true
    }
}

Link to Github repository at the time of writing: here.

Answer №1

The issue I encountered stemmed from a configuration error in my tsconfig.json. Specifically, setting

compilerOptions.removeComments = true
was causing the exclusion of JSDoc comments from my generated .d.ts files.

I found this behavior to be rather unexpected. A relevant problem can be found on Typescript's GitHub page: Preserve JSDocs in *.d.ts files when stripping comments

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