text: new Vue({
      el : '#vue-app',
      data : {
          age : 20,
          x : 0,
          y : 0
      },
      methods : {
          add : function (inc){
              this.age +=inc;
          },
          subtract : function (dec){
              this.age -=dec;
          },
          updateXY : function(event){
              this.x = event.offsetX;
              this.y = event.offsetY;
          },
          visit : function(){
              alert("Visit Function is Called");
          }
      }
  });