Code using constructors to implement inheritance in JavaScript_js object-oriented

Copy code The code is as follows:

//First create the parent class
function Person(name, age , address) {
this.name = name;
this.age = age;
this.address = address;
}
//Create a subclass
function Student(score ) {
this.score = score;
//You can use the call method or the apply method to call the constructor of the function
//Call the constructor of the parent class, and call the constructor of the Person class through the call method . This will initialize the Person object in the student, and the student will also have a copy of the Person's attributes
Person.call(this, "zhangsan",22, "Beijing, China!");
}

var student = new Student(100);
alert(student.address student.score "point");

//The second in the above Person.call method call parameters start with the passed data parameters