angular - What are typescript typings?

Question

I just started playing with angular 2, and I saw that many projects that are available on the web have a folder called typings. Digging more into the problem I found that it has something to do with https://www.npmjs.com/package/typings package. I read their documentation but I didn't understand exactly why do we need typings. Can you provide some example where typings are needed or helpful. Thanks

Answer 1

AFAIK this allows you to use JS libraries like they had type annotations like fully typed TypeScript code. If they are provided for a JS library you get proper autocompletion support and lint checks, ...

See also

• https://blog.mariusschulz.com/2014/05/19/using-typescripts-type-definition-files-to-get-tooling-support-for-plain-javascript
• Are typescript type definitions required?
• How do you produce a .d.ts "typings" definition file from an existing JavaScript library?