typescript-plugin-namespace-import

A TypeScript Language Service Plugin to insert Namespace Import automatically.

Motivation

We often use an object as a namespace.

// someLogics.ts
export const someLogics = {
  calculate() { ... },
  print() { ... },
};

// main.ts
import { someLogics } from "./someLogics.ts";

someLogics.calculate()
// `someLogics` is auto-completable without import!

This is good way in developer experience, but it obstruct tree-shaking. In this case, someLogics.print will be included in bundle although it's not used.

To keep tree-shaking working, we can use Namespace Import.

// someLogics.ts
export function calculate() { ... }
export function print() { ... }

// main.ts
import * as someLogics from "./someLogics.ts";

someLogics.calculate()
// `someLogics` is NOT auto-completable without import :(

Now we can tree-shake someLogics.print. However, developer experience get worse because we can't auto-complete someLogics without import statement. We need to write import statement by ourselves.

typescript-plugin-namespace-import resolves this problem by making Namespace Import auto-completable.

Installation

Install with npm/yarn.

npm install -D typescript-plugin-namespace-import
# or yarn add -D typescript-plugin-namespace-import

Then add this plugin in tsconfig.json.

{
  "compilerOptions": {
    "plugins": [
      {
        "name": "typescript-plugin-namespace-import",
        "options": {
          "paths": ["src/logics"]
        }
      }
    ]
  }
}

paths option is required. See below for detail.

Options

paths (required)

Specify directory in relative path to the project's root (tsconfig.json's dir). All .ts or .js files in the directories can be Namespace Imported with auto-completion.