javascript small example on inheritance_javascript skills

Copy code The code is as follows:

//Inherit
function Person(name,sex )
{
this.name=name;
this.sex=sex;
}
Person.prototype.sayName=function()
{
alert(this. name);
}
Person.prototype.saySex=function()
{
alert(this.sex);
}
function Worker(name,sex,job)
{
//Inherit the person class
Person.call(this,name,sex) //This here refers to the instance of the Worker class, such as 'W' below, pass W into the Person construct function, at this time W is disguised as this
in the Person constructor this.job=job;
}

//Worker.prototype=Person.prototype;//If the prototype is a negative value, the subclass's sayJob method and the Person parent class will also have a sayJob method, because it is passed by reference

//Change to the following method, the subclass will not affect the parent class:
for(var i in Person.prototype)
{
Worker.prototype[i]=Person.prototype[i] ;
}

Worker.prototype.sayJob=function()
{
alert(this.job);
}

var p=new Person('lisi','male');
//alert(p.sayJob);

var w=new Worker('zhangsan','male','soy sauce');
w.sayName();
w.saySex();
w.sayJob() ;