Incomplete typedeclaration from 1.157.8 in @tanstack/router-core

[oddsund]

Which project does this relate to?

Router

Describe the bug

From v1.157.8, the node_modules/@tanstack/router-core/dist/esm/path.d.ts file contains the following:

interface InterpolatePathOptions {
    path?: string;
    params: Record<string, unknown>;
    /**
     * A function that decodes a path parameter value.
     * Obtained from `compileDecodeCharMap(pathParamsAllowedCharacters)`.
     */
    decoder?: (encoded: string) => string;
}

export declare function interpolatePath({ path, params, decoder, server, }: InterpolatePathOptions): InterPolatePathResult;

As you can see, InterpolatePathOptions has no server property. This causes our vite-build to fail with an error pointing to this file.

What's weird is that InterpolatePathOptions in node_modules/@tanstack/router-core/src/path.ts has the server field, so it should be there. 🤷

Your Example Website or App

https://stackblitz.com/edit/tanstack-react-router-interpolatepathresult-bug?file=package.json&startScript=tsc

Steps to Reproduce the Bug or Issue

Verified that the buggy code is present from 1.157.8 onwards by checking out the file dist/esm/path.d.ts via https://www.npmjs.com/package/@tanstack/router-core/v/1.157.8?activeTab=code

https://www.npmjs.com/package/@tanstack/router-core/v/1.157.7?activeTab=code shows the code without the server field.

Expected behavior

No build error.

Screenshots or Videos

No response

Platform

• @tanstack/router-core: 1.157.8 onwards
• OS: macOS
• Bundler: Vite
• Bundler Version: 7.3.1

Additional context

No response