TypeScript Error Guides
Comprehensive guides to help you understand and fix the most common TypeScript errors. Each guide includes explanations, examples, and practical solutions.
Type 'X' is not assignable to type 'Y'
The most common TypeScript error. Learn why types don't match and how to fix assignment errors.
TS2339Property 'X' does not exist on type 'Y'
Accessing non-existent properties? Learn about type narrowing, optional chaining, and interface updates.
TS2345Argument of type 'X' is not assignable to parameter of type 'Y'
Function arguments don't match? Understand parameter types, union types, and Partial<T>.
TS2304Cannot find name 'X'
Missing imports, undeclared variables, or missing type definitions? Find out how to resolve them.
TS2307Cannot find module 'X' or its corresponding type declarations
Module resolution issues? Learn about @types packages, path aliases, and tsconfig settings.
TS2531Object is possibly 'null'
Learn about null checking, optional chaining, and type guards to safely handle nullable values.
TS2532Object is possibly 'undefined'
Handle undefined values safely with optional chaining, nullish coalescing, and proper type guards.
TS7006Parameter 'x' implicitly has an 'any' type
Understand implicit any errors and learn to properly type function parameters.
TS2554Expected X arguments, but got Y
Fix function argument count errors with optional parameters, defaults, and rest parameters.
TS2741Property 'X' is missing in type but required
Learn about required properties, optional properties, and utility types like Partial and Pick.
More Guides Coming
We're working on more guides for TS2571, TS18046, TS2769, and other common errors.
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