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Values in JavaScript called reference types, and there are built-in reference types that can be used to create specific objects

Reference types are similar to classes in traditional object-oriented programming, but the implementation is different.

Object is a basic type, and all other types inherit basic behavior from object 7.

The Array type is an ordered list of values and also provides the ability to manipulate and convert those values

The Date type provides information about the date and time, including the current date and time and related computing functions

The RegExp type is a □ that ECMAScr'ipt supports regular expressions, providing the most basic and some advanced regular expression functions. A function is actually an instance of type ninction, so a function is also an object; this is the most distinctive feature of JaVaScript. Because functions are objects, functions also have methods that can be used to enhance their behavior.

Because of the basic wrapper type, the primitive type values in .JavaScript can be accessed as objects. The three basic packaging types are Boolean, Number and string. The following are their common characteristics:

Each wrapper type maps to a base type with the same name

When a primitive type value is accessed in read mode, an object of the corresponding primitive wrapper type is created, which facilitates data manipulation

The newly created wrapper object is destroyed as soon as the statement that manipulates the primitive type value is completed.

Before all the code is executed, there are already two built-in objects in the scope: Global and Math. There is no direct access to the Global object in most ECMAScript implementations; however, Web browsers implement the window object that assumes this role. Global variables and functions are properties of the Global object. The Math object provides many properties and methods to assist in complex mathematical tasks.

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