How to add custom router?

[imagine10255]

Hi, I use typescript in nextjs 5
but use custom router show typescript error is:

Error:(9, 22) TS2306:File '/Users/apple/Documents/project/with-typescript-app/src/routes.ts' is not a module.

can you help me ? thx o_o

[deptno]

not enough information but,

In TypeScript, just as in ECMAScript 2015, any file containing a top-level import or export is considered a module. Conversely, a file without any top-level import or export declarations is treated as a script whose contents are available in the global scope (and therefore to modules as well).

typescript module article may help you.

this is not a issue related next.js-typescript-starter-kit.
if you need more advice. feel free to email me