JS prototype two

1 functionBox (name,age) {2 3     This. Name =name;4 5     This. Age =Age ;6 7     This. Family = [' elder brother ', ' sister ', ' sister ';8 9 }Ten  OneBox.prototype = { A  - Constructor:box, -  the Run:functiong () { -    return  This. name+ This. age+ "in operation" -  -   } + } - varBox1 =NewBox ("Lee", 100); +  A varBox2 =NewBox ("Jack", 200);

Composite Constructors + prototype mode

Using dynamic prototyping mode

1 functionBox (name,age) {2     This. Name =name;3     This. Age =Age ;4    This. Family = [' elder brother ', ' sister ', ' sister ';5   if(typeof  This. Run! = "function") {//determine if This.run exists6box.prototype.run=function(){7           return  This. name+ This. age+ "in operation"8  }          9  }Ten  } One //the initialization of the prototype is as long as it is initialized for the first time, and it is not necessary to initialize each time the constructor is instantiated.  A  varBox1 =NewBox ("Lee", 100) -  varBox2 =NewBox ("Jack", 200)

JS prototype two