TS2345 — Argument Type Not Assignable

이 에러의 원인

You are passing a value of one type where a different type is expected. This often happens when passing a number where a string is expected, or when object shapes do not match. Union types and optional properties can also cause this mismatch.

수정 방법

Check the function signature to see what type is expected. Cast the value if you are certain it is safe, or transform the data to match the expected type. Use type guards to narrow union types before passing them.

function greet(name: string) {}
greet(42);