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Do we only need type definition files not “node_modules”?

Do we only need type definition files not “node_modules”?

A Type definition files provide better experience when using “JS libraries” with auto completion and type checking but are ignored otherwise.

If we install and import TypeScript libraries and they will be compiled to “JS” and it’s included in the “JS” build output.

Stayed Informed - Angular 2 Interview Questions and Answers

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