js实现轮播图特效
程序员文章站
2022-03-20 17:54:46
本文实例为大家分享了js实现轮播图特效的具体代码，供大家参考，具体内容如下只需要修改图片的src即可html:
<...
本文实例为大家分享了js实现轮播图特效的具体代码，供大家参考，具体内容如下
只需要修改图片的src即可
html:
<body> <div id="rollimgbox"> <div class="photos clearfix"> <!--轮播图里面首位多放最后一张与第一张图片，以便顺畅平滑切换--> <div class="move"><img src="img/timg%20(7).jpg" alt=""></div> <div class="move"><img src="img/timg%20(4).jpg" alt=""></div> <div class="move"><img src="img/timg%20(5).jpg" alt=""></div> <div class="move"><img src="img/timg%20(6).jpg" alt=""></div> <div class="move"><img src="img/timg%20(7).jpg" alt=""></div> <div class="move"><img src="img/timg%20(4).jpg" alt=""></div> </div> <!--points圆点导航,js动态生成--> <div class="points"></div> <!--如果需要向左与向右的按键，引入方向图片--> <span class="leftpoint"> < </span> <span class="rightpoint"> > </span> </div> </body>
style:
*{
margin: 0;
padding: 0;
}
.clearfix{
zoom: 1;
}
.clearfix:after{
content: "";
display: block;
height: 0;
visibility: hidden;
clear: both;
}
#rollimgbox{
/*这里让盒子居中，应用到具体页面删除即可*/
margin: 20px auto;
/*如果该轮播图不是独占一行，需要将其改为行内块元素*/
display: block;
position: relative;
/*在这里设置装载图片的框框的宽高*/
width: 947px;
height: 585px;
/*在这里设置边框的样式用outline，这样就不会影响到后面的js了
/*加边框，用outline即可，不会影响实际的距离*/
outline: 5px solid blue;
overflow: hidden;
}
#rollimgbox .photos .move img{
/*在这里设置图片的宽高，与边框的宽高相同*/
width: 947px;
height: 585px;
}
#rollimgbox .photos{
position: relative;
/*移动的是图片的宽度,左移947px*/
left: -947px;
}
#rollimgbox:hover{
cursor: pointer;
}
#rollimgbox .photos div{
float: left;
}
#rollimgbox .points{
position: absolute;
/*在这里修改圆点导航的位置*/
bottom: 30px;
right: 170px;/*右下方*/
text-align: center;
}
#rollimgbox .points span{
display: inline-block;
/*在这里可以更改圆点的大小*/
text-align: center;
line-height: 66px;
font-size: 24px;
font-family: 微软雅黑;
width: 66px;
height: 66px;
background: rgba(112,117,112,.6);
border-radius: 50%;
margin-left: 15px;
}
#rollimgbox .points .pointsnow{
background: rgba(62,255,49,.6);
}
/*左右按钮*/
#rollimgbox .leftpoint{
width: 60px;
height: 60px;
background: rgba(0,0,0,.5);
text-align: center;
line-height: 60px;
position: absolute;
font-size: 30px;
color: white;
top: 290px;
left: 0;
}
#rollimgbox .rightpoint{
width: 60px;
height: 60px;
background: rgba(0,0,0,.5);
text-align: center;
line-height: 60px;
position: absolute;
font-size: 30px;
color: white;
top: 290px;
right: 0;
}
#rollimgbox .leftpoint:hover{
background: rgba(255,0,0,.5);
}
#rollimgbox .rightpoint:hover{
background: rgba(255,0,0,.5);
}
script:
window.onload = function(){
let rollimgbox = document.queryselector("#rollimgbox");
let photos = document.queryselector("#rollimgbox .photos");
let allimg = document.queryselectorall("#rollimgbox .move img");
let index = 2;
//动态设计移动图片的框框宽高
//(rollimgbox.offsetwidth)是要剪去边框的宽度
photos.style.width = (allimg.length)*(rollimgbox.offsetwidth) + "px";
photos.style.height = rollimgbox.offsetheight + "px";
//动态创建小圆点
let point = new array();
let points = document.queryselector("#rollimgbox .points");
for (let i=0;i<(allimg.length-2);i++){
point[i] = document.createelement("span");
point[i].innerhtml = (i+1);
points.appendchild(point[i]);
}
point[0].classname = "pointsnow";
let rollimgiterval = setinterval(function () {
//图片的轮播
if (index === allimg.length){
photos.style.left = 0;
index = 1;
photos.style.transition = "0s";
point[0].classname = "pointsnow";
} else {
photos.style.transition = "1.5s";
}
photos.style.left = -(rollimgbox.offsetwidth)*index + "px";
index++;
//小圆点的变换
for (let j=0;j<(allimg.length-2);j++){
if (j === index-2){
point[j].classname = "pointsnow";
} else {
point[j].classname = "";
}
}
//这里是最后一张图片（与展现的第一张一样的图）设置小圆点样式
if (index === allimg.length){
point[0].classname = "pointsnow";
}
},2000);
//当用户把鼠标放到rollimgbox盒子中，需要查看图片，自动轮播停止
rollimgbox.onmouseover = function () {
clearinterval(rollimgiterval);
};
rollimgbox.onmouseout = function () {
rollimgiterval = setinterval(function () {
//图片的轮播
if (index === allimg.length){
photos.style.left = 0;
index = 1;
photos.style.transition = "0s";
point[0].classname = "pointsnow";
} else {
photos.style.transition = "1.5s";
}
photos.style.left = -(rollimgbox.offsetwidth)*index + "px";
index++;
//小圆点的变换
for (let j=0;j<(allimg.length-2);j++){
if (j === index-2){
point[j].classname = "pointsnow";
} else {
point[j].classname = "";
}
}
//这里是最后一张图片（与展现的第一张一样的图）设置小圆点样式
if (index === allimg.length){
point[0].classname = "pointsnow";
}
},2000);
};
//点击小圆点，跳转到对应的图片位置
for (let k=0;k<(allimg.length-2);k++){
point[k].onmousedown = function () {
photos.style.left = -(rollimgbox.offsetwidth)*(k+1) + "px";
//小圆点的变换
for (let j=0;j<(allimg.length-2);j++){
if (j === k){
point[j].classname = "pointsnow";
} else {
point[j].classname = "";
}
}
//点击小圆点之后更改index的值
index = k+2;
}
}
//点击左右方向键，对图片进行滑动
let leftpoint = document.queryselector('#rollimgbox .leftpoint');
let rightpoint = document.queryselector('#rollimgbox .rightpoint');
leftpoint.onclick = function () {
photos.style.transition = "1s";
//向左滑动一张图片，并修改index的值（index--）
let dis = index-2;
//当dis为1时，圆点到达第一个位置，如果再往左移动一个，圆点应该到达最后一个位置
if (dis < 1){
dis = allimg.length-2;
photos.style.left = 0;
point[dis-1].classname = "pointsnow";
point[0].classname = "";
index = allimg.length;
} else {
photos.style.left = -(rollimgbox.offsetwidth)*dis + "px";
point[dis-1].classname = "pointsnow";
point[dis].classname = "";
}
//从第一张顺滑切换到最后一张
settimeout(function () {
if (photos.style.left === '0px'){
photos.style.left = -(rollimgbox.offsetwidth)*(allimg.length-2) + "px";
photos.style.transition = '0s';
index = allimg.length-1;
}
},1000);
index--;
};
rightpoint.onclick = function () {
photos.style.transition = "1s";
//向右滑动一张图片，并修改index的值（index++）
let dis = index-1;
//当dis为5时，圆点到达最后一个位置，如果再往右移动一个，圆点应该到达第一个位置
if (dis >= (allimg.length-2)){
photos.style.left = -(rollimgbox.offsetwidth)*(allimg.length-1) + "px";
point[0].classname = "pointsnow";
point[allimg.length-3].classname = "";
index = 1;
} else {
photos.style.left = -(rollimgbox.offsetwidth)*index + "px";
point[dis].classname = "pointsnow";
point[dis-1].classname = "";
}
//从最后一张顺滑切换到第一张
settimeout(function () {
if (photos.style.left === ((-(rollimgbox.offsetwidth)*(allimg.length-1))+'px')){
photos.style.left = -(rollimgbox.offsetwidth) + "px";
photos.style.transition = '0s';
index = 2;
}
},1000);
index++;
};
};