TypeScript
TypeScript found a value that is not assignable to the target type
error TS2322: Type 'X' is not assignable to type 'Y'.
TypeScript rejected an assignment because the value's type is incompatible with the declared or inferred target type.
Error AtlasError Documentation and ResolutionObserved message
error TS2322: Type 'X' is not assignable to type 'Y'.
Why it happens
- The assigned value does not match the variable, property, or return type.
- A union, generic, or inferred type is narrower than the value being assigned.
- A refactor changed one side of the assignment without updating the other.
How to fix it
- Inspect both sides of the assignment and confirm what type TypeScript expects.
- Narrow or transform the value before assigning it if the runtime value is broader than the target type.
- Only widen the declared type if the broader value is genuinely valid throughout the code path.
Official reference
TypeScript Docs: Understanding ErrorsRelated errors
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