详解javascript函数写法大全

 function fnName(){
  console.log("常规写法");
}

var myfn = function(){
  console.log("匿名函数，函数保存到变量里");
 }

 var fnobject1={
   fn1:function(){
      console.log("第一个函数");
   },
   fn2:function(){
      console.log("第二个函数");
   },
   fn3:function(){
      console.log("第三个函数");
   }
 }

 var fnobject2 = function(){};
 fnobject2.fn1 = function(){
   console.log("第一个函数");
 }
 fnobject2.fn2 = function(){
   console.log("第二个函数");
 }
 fnobject2.fn3 = function(){
   console.log("第三个函数");
 }

 var fnobject3 = function(){
   return {
     fn1:function(){
       console.log("第一个函数");
       },
     fn2:function(){
       console.log("第二个函数");
     },
      fn3:function(){
       console.log("第三个函数");
     }  
   }  
 };

 var fnobject4 = function(){
   this.fn1 = function(){
     console.log("第一个函数");
  }
   this.fn2 = function(){
     console.log("第二个函数"); 
   }
   this.fn3 = function(){
     console.log("第三个函数");
   }
 };

 var fnobject5 = function(){};
 fnobject5.prototype.fn1 = function(){
   console.log("第一个函数");
 }
 fnobject5.prototype.fn2 = function(){
   console.log("第二个函数");
 }
 fnobject5.prototype.fn3 = function(){
   console.log("第三个函数");
 }

 var fnobject6 = function(){};
 fnobject6.prototype={
   fn1:function(){
     console.log("第一个函数");
   },
   fn2:function(){
     console.log("第二个函数");
   },
   fn3:function(){
     console.log("第三个函数");
   }
 }

var fnobject7 = function(){};
fnobject7.prototype={
  fn1:function(){
    console.log("第一个函数");
    return this;
  },
    fn2:function(){
    console.log("第二个函数");
    return this;
  },
  fn3:function(){
    console.log("第三个函数");
    return this;
  }
}

 Function.prototype.addMethod = function(name,fn){
   this[name] = fn;
 }
 var methods=function(){};//var methods=new Function();
 methods.addMethod('fn1',function(){
   console.log("第一个函数");
 });
 methods.addMethod('fn2',function(){
   console.log("第二个函数");
 });
 methods.addMethod('fn3',function(){
   console.log("第三个函数");
 });

Function.prototype.addMethod = function(name,fn){
  this[name] = fn;
   return this;
 }
 var methods=function(){};//var methods=new Function();
 methods.addMethod('fn1',function(){
   console.log("第一个函数");
 }).addMethod('fn2',function(){
   console.log("第二个函数");
 }).addMethod('fn3',function(){
   console.log("第三个函数");
 });

Function.prototype.addMethod = function(name,fn){
  this.prototype[name] = fn;
  return this;
}
var Methods=function(){};//var methods=new Function();
methods.addMethod('fn1',function(){
  console.log("第一个函数");
}).addMethod('fn2',function(){
  console.log("第二个函数");
}).addMethod('fn3',function(){
  console.log("第三个函数");
});