TS6133: Declared but its value is never read - in CI

By Daniel Zoghalchali·Latchkey

With noUnusedLocals or noUnusedParameters on, a declared variable, import, or parameter is never used.

What this error means

Type-checking fails with TS6133 naming the unused binding - passes locally if these flags differ from CI.

src/util.ts(3,7): error TS6133: 'temp' is declared but its value is never read.

Common causes

How to fix it

Remove the unused binding

1. Delete the unused variable or import

Prefix intentionally-unused parameters

1. Prefix a deliberately-unused parameter with an underscore so the rule ignores it

arr.map((_item, index) => index)

How to prevent it

• Keep noUnusedLocals/noUnusedParameters on and prune dead code; underscore-prefix intentional unused params.

Frequently asked questions

Related guides

References

• Node.js documentation
• npm CLI documentation
• GitHub Actions documentation