本文实例讲述了JS实现盒子跟着鼠标移动及键盘方向键控制盒子移动。分享给大家供大家参考,具体如下:
1. 盒子跟着鼠标移动
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
Document
*{
margin:0;
padding:0;
}
div{
width: 100px;
height: 100px;
background: red;
position: absolute;
}
document.οnmοusemοve=function fn(ev) {
var event=window.event||ev;
var oDiv=document.getElementsByTagName("div");
for(x=0;x
oDiv[x].style.transition=(x*0.5)+"s";
oDiv[x].style.left=event.clientX+"px";
oDiv[x].style.top=event.clientY+"px";
}
}
2. 键盘方向键控制盒子移动
div{
width:100px;
height:100px;
background: red;
position:absolute;
left:100px;
top:100px;
transition: 0.1s;
}
window.onload = function(){
var oDiv = document.getElementById("div1");
var left = false;
var right = false;
var top = false;
var bottom = false;
document.onkeydown = function(ev){
var oEvent = ev || event;
var keyCode = oEvent.keyCode;
switch(keyCode){
case 37:
left=true;
break;
case 38:
top=true;
break;
case 39:
right=true;
break;
case 40:
bottom=true;
break;
}
};
setInterval(function(){
if(left){
oDiv.style.left = oDiv.offsetLeft-10+"px";
}else if(top){
oDiv.style.top = oDiv.offsetTop-10+"px";
}else if(right){
oDiv.style.left = oDiv.offsetLeft+10+"px";
}else if(bottom){
oDiv.style.top = oDiv.offsetTop+10+"px";
}
},50);
document.onkeyup = function(ev){
var oEvent = ev || event;
var keyCode = oEvent.keyCode;
switch(keyCode){
case 37:
left=false;
break;
case 38:
top=false;
break;
case 39:
right=false;
break;
case 40:
bottom=false;
break;
}
}
}
感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具:/code/HtmlJsRun测试一下运行效果。
希望本文所述对大家JavaScript程序设计有所帮助。