Shulou(Shulou.com)05/31 Report--

This article mainly introduces "how to use constructor in Javascript". In daily operation, I believe many people have doubts about how to use constructor in Javascript. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "how to use constructor in Javascript". Next, please follow the editor to study!

Description

1. Constructor is called a constructor because it refers to the constructor itself.

2. Constructor is mainly used to record which constructor the object is referenced to, so that the prototype object can be redirected to the original constructor.

In many cases, we need to manually use the constructor property to restore the original constructor.

Example

Function Star (uname, age) {this.uname = uname; this.age = age;} / / in many cases, we need to manually use the attribute constructor to refer back to the original constructor / / Star.prototype.sing = function () {/ / console.log ('I can sing'); / /} / / Star.prototype.movie = function () {/ / console.log ('I can do a movie') / /} Star.prototype = {/ / if we modify the original prototype object and assign a value to the prototype object, we must manually use constructor to refer back to the original constructor constructor: Star, sing: function () {console.log ('I can sing') }, movie: function () {console.log ('I can act in a movie');}} var ldh = new Star ('Andy Lau', 18); var zxy = new Star ('Jacky Cheung', 19); console.log (Star.prototype); console.log (ldh.__proto__) Console.log (Star.prototype.constructor); console.log (ldh.__proto__.constructor); at this point, the study of "how to use constructor in Javascript" is over. I hope I can solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.