how can I avoid TS6133 errors when using anonymous methods?

Question

We have a TypeScript project that I am trying to clean-up a bit.
I started turning on stricter type-checking. Today, I just enabled

noUnusedParameters

in

tsconfig.json

.

We use

expressJS

and the following code is getting flagged with a

error TS6133: 'req' is declared but never used.

How can I rewrite this to comply?

import * as express from 'express';



const app = express();



app.get('/', (req, res) => {

    res.sendStatus(200);

});

Obviously, I have to declare

req

if I want to have

res

.

Answer 1

You can resolve this error by prefixing or replacing the unused parameters with an underscore. In this case, you could prefix req as _req:

app.get('/', (_req, res) => {
  ...
});

See this post for more details.

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