There are six basic data types in JavaScript which can be divided into three main categories: primitive (or primary), composite (or reference), and special data types. String, Number, and Boolean are primitive data types. Object, Array, and Function (which are all types of objects) are composite data types.
Read moreWhat is function state in JavaScript?
A function of state and action is a function that takes two arguments: state and action . Functions like that are very common in the JavaScript ecosystem. For example, the reducer function used to build a Redux store is a function that takes the current state and some action and returns nothing but a new state.
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