JS: Interface

What is JavaScript interface

An interface is a spec for a set of property keys and values .

• Any object that has all the properties as described by an interface's spec, is said to have (conform to) that interface.
• The property can be inherited property.

• By definition, many objects can have the same interface.
• By definition, a object can have many interfaces.

When a object confoms to interface X, we say that the object is “X object”. e.g. a object that conforms to the iterable interface is called “iterable object”.

There are 3 interfaces defined by the JavaScript spec:

• JS: Iterable Interface
• JS: Iterator Interface
• JS: IteratorResult Interface

Purpose of JavaScript Interface

JavaScript interface is the underlying mechanism for how Iterable Object works.