JavaScript base -11 JavaScript wrapper class object (Math, Date, number, Boolean)

One, JavaScript Math object

Math Object Overview

-The Math object is a global object provided by ECMAScript, which mainly encapsulates some commonly used mathematical functions and constants

-The Math object does not have a constructor, cannot create an instance of it (instance), and when its properties and methods are called, use the Math object name directly

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Properties of the Math object

-The Math object has the following member properties

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Methods of the Math object

-The Math object has the following member methods

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Trigonometric function

-The Math object provides a common trigonometric function calculation method

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Random number

-The Math object provides a function to generate a random number

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Second, JavaScript Date object

Create a Date object

-Date objects are used to store and calculate times and time

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Get time Information

-You can use the following methods to get time information from a Date object

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Modify Time Information

-You can modify the time information in a Date object using the following methods

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Time format Conversion

-The Date object can be formatted using the following method

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Second, JavaScript Number object

Create Number Object

-The Number object represents numeric data and numeric constants, which are used primarily for outputting numbers in a specified format

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Number object property

-The Number object has the following static constant property

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Number Object method

-You can use the following methods to get time information from a Date object

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Third, JavaScript Boolean object

Create a Boolean object

-A Boolean object that represents a Boolean object (True and False)

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Summary: This chapter covers JavaScript wrapper class objects (Math, Date, number, Boolean)

This article from the "Technical Exchange" blog, declined reprint!

JavaScript base -11 JavaScript wrapper class object (Math, Date, number, Boolean)