What is the process for automatically including type declarations for a library in the tsconfig.json file in TypeScript 2.0?

TypeScript 2.0 introduces a new method of accessing type declarations through npm packages within the @types scope.

npm i --save-dev @types/lodash

As mentioned in this answer, TypeScript can be directed to search for type declaration files by including a string in the `typings` property of `tsconfig.json`, as outlined in the documentation available here.

{
  "compilerOptions": {
    ...
    "types": ["lodash"]
  }
}

The manual process of editing the `tsconfig.json` file every time a new type declaration is installed may seem cumbersome. Is there an automatic solution for this?

I am considering creating an npm script for this task, but I would prefer not to resort to using bash for JSON file modifications.

Answer №1

If you want to leverage the latest @Types definitions, all you need to do is include the typeRoots option and specify the directory. For example,

"typeRoots": [ "node_modules/@types" ]
. This will automatically scan that specified folder for all the types you have installed, eliminating the need to manually add the /// reference.

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