Typescript Enhanced

Change Log

Typescript Enhanced is an extension of the existing Typescript package that modifies the functionality of the tsc command giving it some superpowers.

This package aims for the following guidelines:

• Minimal external dependency
• Minimal modifications on the original Typescript package
• Minimal workflow changes
• Maximal clarity of code

Other solutions that do the same task as Typescript Enhanced don't follow anything similar to this making hard knowing what happens under the hood. In this package you will be able to understand what is happening on the enhancements just by reading their source files.

The earliest version of Typescript supported by this package is actually v2.8.0 because Typescript Enhaced uses the internal mechanism of tsc watch mode. Maybe, if demanded, in a future release this could be upgraded.

Usage

npm i --save-dev typescript typescript-enhanced
npx tsce

This packages wraps the actual tsc command, so it needs typescript to work. Typescript Enhanced uses Typescript as peer dependency to make you able to use any supported version of the package.

Enhancements

Custom Transformers

With Typescript Enhanced you will be able to create any custom transformer you want to your source code using the internal mechanism of Typescript (since version v2.3.0).

To enable this enhacement just add to your tsconfig.json the following line.

{
  // ...
  "compilerOptions": {
      // ...
      "customTransformers": [
          {
              module: "<module path>",
              type: "<before/after>",
              options: {},
          }
      ]
      // ...
  }
  // ...
}

The custom transformer option applies the all the transformations on the order you specify them. You can find some custom transformer examples on the samples folder.

Resolve Aliased Modules

In Typescript Enhanced you will be able to finally resolve those messy imports that don't let you work on Node.js. To enable this enhacement just add to your tsconfig.json the following line.

{
  // ...
  "compilerOptions": {
      // ...
      "resolveAliasedModules": true
      // ...
  }
  // ...
}

This is applied as the last before transformation of the chain so you can modify its behaviour by using any before transformer if you want.

On Fail/Success Commands for watch mode

Sometimes do you want to do anything on watch mode states like starting a server or execute a post-process. This is actually imposible with the tsc command but tsce is able to manage this situation.

To enable this enhacement just add to your tsconfig.json the following line.

{
  // ...
  "compilerOptions": {
      // ...
      "onWatchFail": "<My command>",
      "onWatchSuccess": "<My command>"
      // ...
  }
  // ...
}

or just by adding the following parameters to the tsce command call

tsce --watch --onWatchFail <My command> --onWatchSuccess <My command>

Contribution

Any contribution to upgrade this package is actually welcome :)