How to implement instance inheritance by js

This article mainly shows you "js how to achieve instance inheritance", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "js how to achieve instance inheritance" this article.

The parent class code is as follows:

/ / define an animal class function Animal (name) {/ / attribute this.name = name | | 'Animal'; / / instance method this.sleep = function () {console.log (this.name +' sleeping!') ;}} / / prototype method Animal.prototype.eat = function (food) {console.log (this.name + 'eating:' + food);}; instance inheritance

Core: add new features to the parent class instance and return as a subclass instance

Function Cat (name) {var instance = new Animal (); instance.name = name | | 'Tom'; return instance;} / / Test Codevar cat = new Cat (); console.log (cat.name); console.log (cat.sleep ()); console.log (cat instanceof Animal); / / trueconsole.log (cat instanceof Cat); / / false

Features:

The object returned has the same effect, regardless of whether it is a new subclass () or a subclass ().

Disadvantages:

An instance is an instance of a parent class, not an instance of a subclass

Multiple inheritance is not supported

The above is all the contents of the article "how to implement instance inheritance in js". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!