Function property vs method

Question

What practical differences are there between defining an interface method:

interface Foo {
    bar(): void;
}

and defining a property with

Answer 1

There is another difference, in that the readonly modifier cannot be applied to methods. Therefore, the following assignment cannot be prevented:

interface Foo {
    bar(): void;
}

declare var x: Foo;
x.bar = function () { };

If bar is defined as a property, then the readonly modifier can be applied to it:

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

preventing reassignment.

(Playground)