What are the advantages and disadvantages of the JavaScript constructor?

This article will explain in detail the advantages and disadvantages of the JavaScript constructor, and the content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

1. The advantage of the constructor is that the properties and methods created by the constructor can be shared between instances.

2. The disadvantage is that if there is the same method between instances, this method will be created on each instance, which will obviously result in a waste of system resources.

Example

Function Person (name,age,sex) {this.name = name; this.age = age; this.sex = sex; this.sayName = function () {console.log (this.name);}} var p1 = new Peson ("A", 20, "male"); var p2 = new Person ("B", 20, "female") On the advantages and disadvantages of the JavaScript constructor are shared here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.