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TypeScript cannot find the referenced name

error TS2304: Cannot find name 'X'.

TypeScript could not resolve an identifier because it is not declared in scope or the expected type definitions are not available.

TS2304build errors

Observed message

error TS2304: Cannot find name 'X'.

Why it happens

  • The referenced variable, type, or function is not declared in scope.
  • An import was removed, renamed, or never added.
  • The project is missing the ambient type definitions that provide the symbol.

How to fix it

  1. Verify the symbol exists and is declared or imported in the current file.
  2. Check for spelling mistakes and renamed exports.
  3. Add the required type definitions or library configuration if the missing name should come from the runtime environment.

Official reference

TypeScript Docs: Understanding Errors

Related errors

TS2307TypeScript cannot find moduleTS2683TypeScript could not determine the type of thisTS2339TypeScript could not find the referenced property on the current typeTS7053TypeScript could not safely use the expression to index the target type

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TS2304 Cannot find name: causes and fixes | Error Atlas