5 commonly used objects in JavaScript

Preface:

I believe that those who build websites are very familiar with JavaScript . It is a scripting language. Unlike Python , it is a browser scripting language, while Python is a server scripting language. We must not only know Python , but also JavaScript , because it plays a big role in making web pages.

1. JavaScript Objects

There are many useful objects in JavaScript that can be used to implement many functions. In addition to the ones we have touched before, there are also the following:

Date Date RegExp Regular Error Error

Next, let’s take a closer look at what they are useful for:

1).Array object

It is the well-known array object, which can store many values ​​and access them using subscripts. Common operations are as follows:

2).Boolean object

/*Return the source code of the object*/
b.toSource() 
 
 
/*Convert a logical value to a string and return the result. */ 
b.toString() 
 
 
/*Return the primitive value of a Boolean object. */
b.valueOf() 

3).Date object

This object mainly operates on time. We can get and set the time through this object, as shown in the figure:

4).Math object

This object is just like the method in our Python math module, and both can be understood in the same way, as shown in the figure:

5). Number object

It mainly involves some operations on digital objects, which are relatively simple and have few methods, as shown in the figure:

6).String object

It mainly operates on string objects, such as string concatenation and segmentation. This is an object we often use. Its usage is as follows:

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