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This article mainly explains "what are the shortcomings of js prototype chain inheritance". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what are the shortcomings of js prototype chain inheritance.

1. In order to add new properties and methods to a subclass, it must be executed after a sentence such as newAnimal (), not in the constructor.

2. All properties of the prototype object are shared by all instances.

3. When creating a child instance, you cannot pass the function to the parent constructor.

Multiple inheritance is not supported.

Example

Function Cat () {} Cat.prototype = new Animal (); Cat.prototype.name = 'cat'; var cat = new Cat (); console.log (cat.name); / / catcat.eat (' fish') / / cat is eating: fishcat.sleep () / / cat is sleeping! Console.log (cat instanceof Animal); / / trueconsole.log (cat instanceof Cat); / / true thank you for reading, above is the content of "what are the shortcomings of js prototype chain inheritance". After the study of this article, I believe you have a deeper understanding of the shortcomings of js prototype chain inheritance, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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