Function property vs method

Question

What practical differences are there between defining an interface method:

interface Foo {     bar(): void; } 

and defining a property with a function type:

interface Foo {     bar: () => void; } 

?

Answer 1

If these are the only declarations, these are identical.

The only difference is that you can augment the first form in a second declaration to add new signatures:

// Somewhere interface Foo {   bar(): void; }  // Somewhere else interface Foo {   bar(s: number): void; }  // Elsewhere let x: Foo = ... x.bar(32); // OK