What is the purpose of including references in Typescript Declarations?

My current project involves two TypeScript projects - one is the lib project and the other is the consuming app project. The lib project compiles to a single JS file with a declarations file being generated as well. However, I've noticed that the declarations file includes a reference at the top-

/// <reference path="typings/index.d.ts" />

The issue lies in the fact that the lib project has a typings directory next to the tsconfig.json, but this directory should not be referenced in the declarations file. Below is the content of my tsconfig:

{
    "compilerOptions": {
        "module": "commonjs",
        "experimentalDecorators": true,
        "declaration": true,
        "noImplicitAny": false,
        "removeComments": true,
        "preserveConstEnums": true,
        "outFile": "proj-lib.js",
        "sourceMap": true
    },
    "include": [
        "./js/**/*.ts"
    ]
}

I'm puzzled as to why these references are included in my declarations file.

Temporary Solution

For now, I'm using gulp-regex-replace to eliminate references from the declaration files using the following script:

tsResult.dts
            .pipe(replace({regex: /\/\/\/\s*<reference[^>]+>\s*/g, replace: ''})) // remove references in declaration file
            .pipe(gulp.dest(target));

This solution is less than ideal, so I hope there's a more straightforward tsc (TypeScript Compiler) solution available.

Answer №1

Make sure to refer to the TypeScript compiler options documentation for more information :)

https://www.typescriptlang.org/docs/handbook/compiler-options.html

--declaration boolean (default)false Generates a corresponding '.d.ts' file.

Only include references for typings (.d.ts files)

If you disable it in your tsconfig file (option line 3), it should no longer appear.

Cheers!

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