Constructors in JavaScript

Like Java, JavaScript is object-oriented. However, JavaScript does not have the class concept. Therefore, JavaScript constructor and Java object-oriented language constructor will be different. In Java, a common constructor can be like this: [Like Java, ja JavaScript is object-oriented. However, JavaScript does not have the class concept. Therefore, JavaScript constructor and Java object-oriented language constructor will be different. In Java, a common constructor can be like this: [java] public class Person {private String name; private int age; private String [] hobbies; public Person (String name, int age, String [] hobbies) {this. name = name; this. age = age; this. hobbies = hobbies;} public void print () {System. out. println ("My name is" + name + ", my age is" + age + "My hobby is" + Arrays. toString (hobbies) ;}} we can use it like this: [java] public static void main (String [] args) {Person p = new Person ("Mike", 22, new String [] {"basketball", "badminton", "golf"}); p. print ();} output: [plain] My name is Mike. My age is 22. My hobby is [basketball, badminton, golf] Let's see what the JavaScript constructor looks like: [javascript] // constructor function Person (name, age, hobbies) {this. name = name; this. age = age; this. hobbies = hobbies; this. print = function () {lele.info ('My name is '+ this. name + ', my age is' + this. age + 'my hobby is '+ this. hobbies) ;}} here we should note that the constructor is actually a common function, but the function body uses this (current object ). use it to see: [javascript] var mike = new Person ('Mike ', 22, ["basketball", "badminton", "golf"]); Mike. print (); console print message (F12): [plain] My name is Mike, my age is 22. My hobby is basketball, badminton, golf