what does references.d.ts file do and where is it located in a NativeScript Project?

Question

i am following this tutorial in nativescript and it states to put

/// <reference path="./node_modules/nativescript-barcodescanner/barcodescanner.d.ts" /> Needed for autocompletion and compilation.

in references.d.ts . my question is what does this file do and where is it located in a nativescript application

Answer 1

The reference.d.ts file can be added to your project in the root directory, prior to NativeScript 3.0+ it was included in typescript and angular template projects. It is used to add external type definitions to your project such as tns-platform-declarations . I believe however since that tutorial is a year old you won't need to add the reference.d.ts file to import those anymore and the typescript compiler should pull them in automatically.