A review of 15 native object type systems in JavaScript

I. Several basic concepts

1. Data type: Types of values that can be represented and manipulated are called data types

2.javascript type system: Native object, host object, browser expansion object;

Two. A graph that understands the native object type relationships of JavaScript

Classification of three javascript15 native objects

Add: Ignores global objects in a single built-in object. This lesson is a simple classification of various object types, the next lesson we will learn more about its function and usage.

A review of 15 native object type systems in JavaScript