Tips for utilizing generated *.d.ts files

I have been utilizing a Visual Studio 2017 extension called TypeScript Definition Generator to automatically create TypeScript interfaces for my MVC-ViewModels. Despite trying various similar tools, they all seem to result in the same output (*.cs.d.ts-File):

declare module server {
    interface mycustomtype {
        id: any;
        description: string;
    }
}

In my other TypeScript files, I've experimented with different approaches to using the generated module/type declarations, but each attempt leads to errors:

import { mycustomtype } from '.././../../../../Models/mycustomtype.cs';

The above code triggers an error message stating that mycustomtype is not recognized as a module. Changing the output of the Definition Generator to export module helps identify the module but not the type.

Additionally, I also attempted the following method:

/// <reference path=".././../../../../Models/mycustomtype.cs" />

This approach works, however, Visual Studio's intellisense fails to display either server.mycustomtype or mycustomtype.

My main query is: How should I properly consume these declared modules? I came across a suggestion in another discussion mentioning that declaring a module without quotes creates an "internal" module. Could this be the issue? Given that multiple TypeScript Definition Generators are producing identical outputs, it seems likely that the problem lies on my end rather than with the generated code.

Answer №1

The .d.ts file serves as a definition file in TypeScript, solely for providing intellisense support and not for module functionality.

Therefore, .d.ts files are only necessary to inform TypeScript that a certain class/interface/enum exists elsewhere. It is important to note that you must still implement these entities somewhere, whether defining a variable received from an API request or within a function.

Personally, I find little value in using .d.ts files and instead recommend utilizing export and import statements. In my experience with the TypeScript Definition Generator, I have found this approach to be more effective.

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