build

Library build

Command tramvai build can build libraries to separate bundles for various environments:

• CommonJS modules + ES2019 code (for nodejs without ESM support) - it uses field main in package.json
• ES modules + ES2019 code (for nodejs with ESM support) - it uses filed module in package.json
• ES modules + ES2019 code (for browsers) - it uses field browser in package.json

@tramvai/cli use @tramvai/build package under the hood for bundling packages.

To specify new library in tramvai.json add new project with the type package:

{
  "projects": {
    "{{packageName}}": {
      "name": "{{packageName}}",
      "type": "package",
      "root": "libs/{{packageName}}"
    }
  }
}

Library settings should be specified in the package.json of the library itself:

{
  "name": "{{packageName}}",
  "version": "1.0.0",
  "main": "dist/index.js", // main library entry point
  "browser": "dist/browser.js", // optional field, library entry point for browsers bundle
  "typings": "src/index.ts", // 
  "sideEffects": false,
  "scripts": {
    "start": "tramvai build {{packageName}} --watchMode", // watch mode to develop package
    "build": "tramvai build {{packageName}} --forPublish --preserveModules" // single time build for the production
  }
}

See the complete documentation about output targets, configuration and many reciepes in @tramvai/build documentation.

Enable sourcemaps in production mode

In tramvai.json

"sourceMap": {
  "production": true
}

It is equivalent to devtool: 'hidden-source-map' in webpack config.