import  Vue from  'vue' ; 
import  App from  './App.vue' ; const  app =  new  Vue ( { render :  h  =>  h ( App) , 
} ) . $mount ( '#app' ) ; 
window. addEventListener ( 'keyup' ,  function ( event )  { console. log ( '键盘抬起事件:' ,  event. key) ; 
} ) ; 
window. addEventListener ( 'click' ,  function ( event )  { console. log ( '鼠标点击事件:' ,  event. clientX,  event. clientY) ; 
} ) ; 
app. $on ( 'keyup' ,  function ( event )  { console. log ( '键盘抬起事件:' ,  event. key) ; 
} ) ; app. $on ( 'click' ,  function ( event )  { console. log ( '鼠标点击事件:' ,  event. clientX,  event. clientY) ; 
} ) ;