JavaScript中继承用法实例分析
本文实例分析了JavaScript中继承的用法。分享给大家供大家参考。具体如下:
//definethePersonClass functionPerson(){} Person.prototype.walk=function(){ alert('Iamwalking!'); }; Person.prototype.sayHello=function(){ alert('hello'); }; //definetheStudentclass functionStudent(){ //Calltheparentconstructor Person.call(this); } //inheritPerson Student.prototype=newPerson(); //correcttheconstructorpointerbecauseitpointstoPerson Student.prototype.constructor=Student; //replacethesayHellomethod Student.prototype.sayHello=function(){ alert('hi,Iamastudent'); } //addsayGoodByemethod Student.prototype.sayGoodBye=function(){ alert('goodBye'); } varstudent=newStudent(); student.sayHello(); student.walk(); student.sayGoodBye(); //checkinheritance alert(studentinstanceofPerson);//true alert(studentinstanceofStudent);//true
希望本文所述对大家的javascript程序设计有所帮助。