Whats difference between function which returns void and Function type?-CodePudding

I have two interfaces;

interface A {
 func: () => void;
} 

interface B {
 func: Function;
}

What's the difference between A and B interfaces?

CodePudding user response：

I think using Function type isn’t very good idea, even TS linter warn you that this is dangerous because you don’t provide scheme of function:

Don't use Function as a type. The Function type accepts any function-like value. It provides no type safety when calling the function, which can be a common source of bugs. It also accepts things like class declarations, which will throw at runtime as they will not be called with new. If you are expecting the function to accept certain arguments, you should explicitly define the function shape.

So better use something like

interface A {
  func: (a: string) => number;
}

Btw for void function you could also use VoidFunction type instead of () => void;