One common example would be to refer to instance properties of an object from a method that is attached to the object's prototype. Actually I think using bind(

One common example would be to refer to instance properties of an object from a method that is attached to the object's prototype. Actually I think using bind() would be a very unusual thing, but that could just be my style of writing code (I don't think I've ever used it in any code I have written over the years).