# TS5110: Option 'module' must be set to '…' when option 'moduleResolution' is set to '…'.

> `moduleResolution` is `node16` or `nodenext` but `module` doesn't match. Set `module` to the same value.

## What it means

Node's resolution modes only make sense together with the matching module format: with
`"moduleResolution": "nodenext"`, `module` must be `nodenext` too (and `node16` with `node16`).
The error is reported on the `module` setting.

ts-r's config loader has this check, but `ts-r-check` doesn't print program-level option
diagnostics yet, so it doesn't report this code today. tsc 7 does.

## How to fix

- Set `module` to the same value as `moduleResolution`, or remove `moduleResolution` and let
  `"module": "nodenext"` imply it.
- If a bundler builds the code, use `"module": "esnext"` with `"moduleResolution": "bundler"`.

Source: https://ts-r.dev/errors/TS5110/