説明

滑鼠移動→觸發事件

#screenBox Hover me
#locate

#screenBox
 width: 300px
 height: 200px
 background-color: #eee
 text-align: center
 line-height: 200px
 color: rgba(0,0,0,0.5)

screenBox.addEventListener("mousemove", function(e){
 locate.textContent=`Mouse locate is (${e.offsetX}, ${e.offsetY})`
})

Display