Today I wrote about the floor effect myself, I was a little irritable and made mistakes in small places. Dear masters, I have not modified enough! ! !
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Floor Switch</title><style>*{padding: 0;margin: 0;}li{list-style: none;}.main img{width: 850px;height: 700px;float: left;}.title{width: 850px;height: 50px;text-align: center;line-height: 50px;}.floor{position: fixed;top: 20px;right: 20px;display: none;}.floor ul li{width: 70px;height: 30px;text-align: center;line-height: 30px;cursor: hand;cursor: pointer}.liStyle{background-color: red;}.loading{background:url("image/loading.gif") no-repeat center center;}#back{cursor: hand;cursor: pointer;}</style></head><body><div id="main"><h3>Picture appreciation</h3><img as="image/1.jpg"/><img as="image/2.jpg"/><img as="image/3.jpg"/><img as="image/4.jpg"/><img as="image/5.jpg"/><img as="image/6.jpg"/><img as="image/7.gif"/><img as="image/8.jpg"/><img as="image/9.jpg"/><img as="image/10.jpg"/><img as="image/10.jpg"/><img as="image/10.jpg"/><img as="image/10.jpg"/><img as="image/10.jpg"/><img as="image/2"/><img"/><img" as="image/4.jpg"/><img"/><img as="image/5.jpg"/><img as="image/6.jpg"/><img as="image/7.gif"/><img as="image/8.jpg"/><img as="image/10.jpg"/><img"/><img as="image/10.jpg"/><li>First</li></ul><p id="back">Return to top</p></div><script> var main = document.getElementById("main"); var floor = document.getElementById("floor"); var image = main.getElementsByTagName("img"); var floorUl = document.getElementById("floorUl"); var li = floorUl.getElementsByTagName("li"); var back = document.getElementById("back"); window.onload = window.onscroll = function(){ var scrollTop = document.documentElement.scrollTop || document.body.scrollTop; var height = document.documentElement.clientHeight || document.body.clientHeight; for(var i = 0;i < image.length; i++){ image[i].className = "loading"; if(delay(image[i]).top < scrollTop + height){ image[i].src = image[i].getAttribute("as"); } } if(scrollTop >= image[0].offsetTop){ floor.style.display = "block"; }else { floor.style.display = "none"; } var num = 0; for(var i = 0; i < image.length;i++){ if(scrollTop >= image[i].offsetTop){ num = i; } li[i].className = ""; } li[num].className = "liStyle"; for(var i = 0;i < li.length;i++){ li[i].onclick = function(){ for(var j = 0;j < li.length;j++){ if(this == li[j]){ document.documentElement.scrollTop = image[j].offsetTop; document.body.scrollTop = image[j].offsetTop; } } } } } } var time = null; back.onclick = function() {function goBack(){ var ss = document.documentElement.scrollTop || document.body.scrollTop; ss-=50; document.documentElement.scrollTop = ss; document.body.scrollTop = ss; if(ss<= 0){ clearInterval(time); } } time = setInterval(goBack,1); } function delay(obj){ var l = 0; var t = 0; while (obj){ l = l + obj.offsetLeft; t = t + obj.offsetTop; obj = obj.offsetParent; } return{left:l,top:t}; }</script></body></html>The above simple example of JS achieving floor effects is all the content I share with you. I hope you can give you a reference and I hope you can support Wulin.com more.