学习JavaScript鼠标响应事件
微宇宙 人气:1本文为大家分享了一个简单的鼠标模拟案例，供大家参考，具体实现内容如下
如何实现捕抓鼠标事件，当鼠标滑动时，获取当前鼠标的坐标，接着在一个透明区域里绑定捕抓的位移，这样就能在模拟的透明区域里实现鼠标滑动的模型。
效果图：
HTML代码：
<!DOCTYPE html> <html > <head> <meta charset="UTF-8"> <title> the mouse </title> <link rel="stylesheet" href="css/new.css"> </head> <body> <div class="main"> <div class="content"> <div class="content-nav-top"> <span onclick = 'koringz.createclick1(0)'>默认</span> <span onclick = 'koringz.createclick1(50)'>圆</span> </div> <div class="content-nav-left"> <span onclick = 'koringz.createclick2 (0.25) '>0.25</span> <span onclick = 'koringz.createclick2 (0.5) '>0.5</span> <span onclick = 'koringz.createclick2 (0.75)'>0.75</span> <span onclick = 'koringz.createclick2 (1) '>1</span> </div> <div class="box">鼠标感应器(the mouse sensor)</div> <div class="block"> <div class='block_case'></div> </div> </div> </div> <script type="text/javascript" src="jshttps://img.qb5200.com/download-x/demo.minhttps://img.qb5200.com/download-x/demo.min.js"></script> </body> </html>
CSS代码：
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
position: absolute;
text-align: center;
height: 100%;
width: 100%;
}
.main{
position: relative;
margin: 0 auto;
height: 100%;
background-color: rgb(48, 70, 82)
}
.main .content{
position:absolute;
display: inline-block;
top:50%;
left:50%;
margin-left: -300px;
margin-top: -150px;
width: 600px;
height: 300px;
line-height: 300px;
/*overflow: hidden;*/
background: radial-gradient(ellipse farthest-corner, rgb(115, 176, 198) 0%, #888 100%);
background: -webkit-radial-gradient(ellipse farthest-corner, rgb(115, 176, 198) 0%, #888 100%);
box-shadow: 2px 3px 8px rgba(67, 50, 124 ,.6),0px 0px 8px rgba(67, 50, 124 ,.6);
}
.main .content .content-nav-top{
display: none;
position: absolute;
margin-top: -50px;
height: 50px;
width: 300px;
}
.main .content .content-nav-top >span{
display: block;
float: left;
font-size: 16px;
font-weight: normal;
margin-right:1px;
width: 50px;
height: 50px;
line-height: 50px;
background-color: rgba(251, 214, 146,.3);
box-shadow: 0px 4px 13px rgb(222,222,222,1);
cursor: pointer;
}
.main .content .content-nav-top >span:nth-child(1){
border-radius:0 ;
}
.main .content .content-nav-top >span:nth-child(2){
border-radius:50% ;
}
.main .content .content-nav-top >span:nth-child(3){
border-radius:0;
}
.main .content .content-nav-top >span:nth-child(4){
border-radius: 50% ;
}
.main .content .content-nav-left{
display: none;
position: absolute;
margin-left: -50px;
width: 50px;
height: 300px;
}
.main .content .content-nav-left >span{
display: block;
font-size: 16px;
font-weight: normal;
margin-bottom:1px;
width: 50px;
height: 50px;
line-height: 50px;
background-color: rgb(85, 145, 140);
box-shadow: 0px 4px 13px rgb(222,222,222,1);
border-radius:50% 0 0 50% ;
cursor: pointer;
}
.box{
position: relative;
float: left;
width: 49.9%;
height: 100%;
border-right-style: solid;
border-right-width: 1px;
border-right-color: rgba(211,211,211,.5);
color:rgb(99, 84, 168);
text-shadow: 0px 1px 0px #888,1px 0px 0px #888,0px 0px 1px #888;
}
.block{
float: right;
width: 50%;
height: 100%;
}
JS代码:
var koringz = (function(){
var x,
y,
getmain,
getcontent,
getbox,
getblock,
getblock_case,
getnav_top,
block_case_margin_top,
block_case_margin_left,
block_casetostring1,
block_casetostring2,
block_casesubstring1,
block_casesubstring2,
istouch;
getmain = document.querySelector('.main');
getcontent = getmain.querySelector('.content');
getbox = getcontent.querySelector('.box');
getblock = getcontent.querySelector('.block');
getblock_case = getblock.querySelector('.block_case');
getnav_top = getcontent.querySelector('.content-nav-top');
getnav_left = getcontent.querySelector('.content-nav-left');
function get_box() {
w_getbox_distance = getbox.offsetWidth;
h_getbox_distance = getbox.offsetHeight;
istouch = 'ontouchstart' in window;
getbox.addEventListener(istouch?'touchmove':'mousemove',mouseevent,false);
getbox.addEventListener(istouch?'touchmove':'mousemove',nav,false)
}
function nav () {
return new_nav();
}
var new_nav = function () {
getnav_top.style.display = 'block';
getnav_left.style.display = 'block';
}
function move_box() {
getblock_case.style.width = '0px';
getblock_case.style.height = '0px';
block_case_margin_left = getblock_case.style.marginLeft = getblock.offsetWidth/2 + 'px';//子节点
block_case_margin_top = getblock_case.style.marginTop = getblock.offsetHeight/2 + 'px';
block_casetostring1 = block_case_margin_left.toString();//值转化为字符串
block_casetostring2 = block_case_margin_top.toString();
block_casesubstring1 = block_casetostring1.substring(0,3);
block_casesubstring2 = block_casetostring2.substring(0,3);
}
var mouseevent = function () {
mouseEvent(event);
}
function mouseEvent(e){
var zore = 0,
val = 1;
if(istouch){
x = e.touches[zore].pageX;
y = e.touches[zore].pageY;
e.preventDefault();
}
else if(!istouch){
x = w_getbox_distance/2 != undefined ? e.offsetX:e.layerX;
y = h_getbox_distance/2 != undefined ? e.offsetY:e.layerY;
}
if(val = true){
getblock_case.style.width = x + 'px';//获得了mouse划过的位置
getblock_case.style.height = y + 'px';
getblock_case.style.marginLeft = (block_casesubstring1-x/2) +'px';
getblock_case.style.marginTop = (block_casesubstring2-y/2) +'px';
getblock_case.style.backgroundColor = "rgba(147, 106, 77,1)";
}
}
(function (){
window.onload = function(){
move_box();
get_box()
}
})()
var click =function () {
this.borderradius = function(num) {
if(typeof num == 'number'){
if(num == 0){
getblock_case.style.borderRadius = num;
}
else if(num > 0){
getblock_case.style.borderRadius = num +'%';
}
else{
return false;
}
}
}
this.opacitas = function (num) {
if(typeof num == 'number'){
getblock_case.style.opacity = num;
}
else{
return false;
}
}
}
var Click = new click();
return {
createclick1 :Click.borderradius,
createclick2 :Click.opacitas
}
})()
这里的鼠标箭头也可换成自己喜欢的图标，模拟鼠标区域的颜色也可自由变换，模拟区域的效果也可是点状的，也可以是线状的，动画效果等等，这个自由发挥吧。
以上就是针对JavaScript鼠标响应事件进行的详细介绍，希望对大家的学习有所帮助。
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