JavaScript中繼承用法實例分析

 　　本文實例分析了JavaScript中繼承的用法。分享給大家供大家參考。具體如下：

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 // define the Person Class function Person() {} Person.prototype.walk = function(){ alert ('I am walking!'); }; Person.prototype.sayHello = function(){ alert ('hello'); }; // define the Student class function Student() { // Call the parent constructor Person.call(this); } // inherit Person Student.prototype = new Person(); // correct the constructor pointer because it points to Person Student.prototype.constructor = Student; // replace the sayHello method Student.prototype.sayHello = function(){ alert('hi, I am a student'); } // add sayGoodBye method Student.prototype.sayGoodBye = function(){ alert('goodBye'); } var student = new Student(); student.sayHello(); student.walk(); student.sayGoodBye(); // check inheritance alert(student instanceof Person); // true alert(student instanceof Student); // true

　　希望本文所述對大家的javascript程序設計有所幫助。