The Future of Declaration Files | TypeScript

Declaration files (.d.ts files) are a fundamental part of using existing JavaScript libraries in TypeScript, but getting them has always been a place where we’ve known there was room for improvement. As we get closer to TypeScript 2.0, we’re very excited to show off a sneak peak of our plan to simplify things. Getting type declarations in TypeScript 2.0 will require no tools apart from npm.

As an example, getting the declarations for a library like lodash will be just an npm command away:

npm install --save @types/lodash

From there you’ll be able to use lodash in your TypeScript code with no fuss. This works for both modules and global code.

Source: The Future of Declaration Files | TypeScript

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