The distinguished data type of the object class instance in JS Create object

A class is a specific subdivision of an object, and an instance is a specific thing in a class.

Basic data types and reference data types

Basic data type: numble string undefined null

Reference data types: objects and functions

The object data type is also subdivided into: object Class (Objects) array class (array) regular Class (REG). ）

Characteristics of basic data types: operation by value

Characteristics of reference data types: first open a space, the browser assigns it an address, then saves the content in space, and finally assigns the address to the variable.

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How objects are created

1. Literal type

var obj={}

Cases:

var person={

Name= "Li Xiao Jing",

Age=24

};

How instances are created

var obj=new Object ();

Obj.name= "LXJ";

obj.age=24;

}

The distinguished data type of the object class instance in JS Create object