Parameters<T>
Constructs a tuple type from the parameters of function type T.
Syntax
Parameters<Type>Returns
tuple type — A tuple of the parameter types of the function type T.
Examples
function greet(name: string, age: number) {}
type Args = Parameters<typeof greet>;
// [name: string, age: number]
function call<F extends (...a: any[]) => any>(
fn: F,
...args: Parameters<F>
) {
return fn(...args);
}
Notes
Uses `infer` to capture the parameter list as a labeled tuple. Combine with
spread element access to forward arguments to a wrapped function. Use
`ConstructorParameters` for constructor signatures.