What are the advantages and disadvantages of js composition inheritance
This article mainly shows you "what are the advantages and disadvantages of js combination 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 what are the advantages and disadvantages of js combination inheritance "this article.
1. The advantage is that function reuse can be realized to ensure that the properties of each instance will not affect each other.
2. The disadvantage is that the supertype attribute inherits twice, one is the subtype prototype inheritance, the other is the subtype instance inheritance, but the property inherited by the instance shields the attributes inherited by the prototype.
Example
/ / parent constructor function Father (name) {this.child = {name: name}} / / binding method Father.prototype.alertName = function () {console.log (this.child)} / / Child constructor borrows constructor to inherit parent function Children (name) {Father.call (this) Name)} / / prototype chain inheritance Children.prototype = new Father () Children.prototype.constructor = Children / / create function Children.prototype.speakName = function () {console.log ('speakName')} / / create subinstance let C1 = new Children (' c1') let c2 = new Children ('c2') / / modify reference type value namec1.child.name =' modify reference type value'/ / combined inheritance does two things: / / 1. Reuse prototype method / / 2. Instance properties isolate c1.alertName () / {name: 'modify reference type value'} c1.speakName () / / speakName c2.alertName () / / {name: 'c2'} c2.speakName () / / speakName console.log (C1 instanceof Father) / / true above are all the contents of the article "what are the advantages and disadvantages of js composite inheritance". 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!
