console 命令行工具 X clear

console

var box = document.querySelector('.box');
box.addEventListener('mousemove',function(e){
	var x = e.pageX - this.offsetLeft;
    var y = e.pageY - this.offsetTop;
    console.log('x的坐标是'+x+','+'y的坐标是'+y);
})

<div class="box">

</div>

.box{
    width: 150px;
    height: 150px;
    background-color: skyblue;
    margin:auto 100px;
}