最简单的原型继承

function c1(name){
  this.name=name;
  this.hello=function(){
    console.log(this.name);
  };
}

c2.prototype=new c1();
function c2(name){
  var params=Array.prototype.slice.call(arguments);
  c1.apply(this,params); //将this传递给父类

}

var obj1=new c1(‘zy‘)
var obj2=new c2(‘zyy‘);
obj2.hello()

obj1.hello();