I always see many advertisements or websites that use the full-screen scrolling effect. I always feel itchy when I look at it, and I want to implement one myself. I just recently learned the animation effect of CSS3, so I tried to use CSS3 to make a full-screen switch.
Page structure
The implementation idea is similar to the popular method, as shown in the figure
Each section is a page of content, and its size fills the screen (red area), a container It is composed of multiple sections. We can achieve the effect of page switching by changing the position of the container. When the container goes down, the page seems to move up; when the container goes up, the page seems to move down.
The html structure is as follows:
<!DOCTYPE html><html><head lang="ch"> <meta charset="UTF-8"> <!--适配移动端--> <meta name=”viewport” content="width=device-width, user-scalable=no, initial-scale=1.0"> <title></title> <style> body, html{ padding: 0; margin: 0; } body, html { height: 100%; /**隐藏滚动条**/ overflow: hidden; } #container, .section { height: 100%; } #section0 { background-color: #83af9b; } #section1 { background-color: #764d39; } #section2 { background-color: #ff9000; } #section3 { background-color: #380d31; } </style></head><body><div id="container"> <div class="section" id="section0"></div> <div class="section" id="section1"></div> <div class="section" id="section2"></div> <div class="section" id="section3"></div></div></body></html> Event monitoring
At this time, only one page is displayed in the window, and we add scroll monitoring to it, because firefox and non-firefox browsers are sensitive to scrolling Monitoring support is different. In Firefox browser, scrolling up is -120 and scrolling down is 120, while in other browsers, scrolling up is 5 and scrolling down is -5, so you need to make a judgment:
<script src="http://code.jquery.com/jquery-latest.js"></script><script> //当前页面索引 var curIndex = 0; var scrollFunc = function (e) { e = e || window.event; var t = 0; if (e.wheelDelta) {//IE/Opera/Chrome t = e.wheelDelta; if (t > 0 && curIndex > 0) { //上滚动 movePrev(); } else if (t < 0 && curIndex < sumCount - 1) { //下滚动 moveNext(); } } else if (e.detail) {//Firefox t = e.detail; if (t < 0 && curIndex > 0) { //上滚动 movePrev(); } else if (t > 0 && curIndex < sumCount - 1) { //下滚动 moveNext(); } } }; function moveNext(){ } function movePrev(){ } function init(){ /*注册事件*/ if (document.addEventListener) { document.addEventListener('DOMMouseScroll', scrollFunc, false); }//W3C window.onmousewheel = document.onmousewheel = scrollFunc;//IE/Opera/Chrome } init(); </script> In order to prevent The user of the first page scrolls up, and the user of the last page scrolls down, so curIndex is used to represent the current page index to monitor when scrolling. Of course, if you want to make the page scroll in a loop, you only need to modify the conditional restrictions.
Add animation
The animation uses the translate3D of the transform attribute in css3. We first need to get the height of the screen, and then move the container up one screen height or down when the page switches. One screen height.
The reason for using translate3D is that hardware acceleration is turned on on the mobile phone to make the animation smoother. It receives three parameters, namely the displacement of the x-axis, y-axis and z-axis. For example,
transform: tanslate3D(10px, 30px, 0);
The modified js code is as follows:
<script> //当前页面索引 var curIndex = 0; //container元素 var container = $("#container"); //页面总数 var sumCount = $(".section").length; //窗体元素 var $window = $(window); //动画时间 var duration = 500; var scrollFunc = function (e) { e = e || window.event; var t = 0; if (e.wheelDelta) {//IE/Opera/Chrome t = e.wheelDelta; if (t > 0 && curIndex > 0) { //上滚动 movePrev(); } else if (t < 0 && curIndex < sumCount - 1) { //下滚动 moveNext(); } } else if (e.detail) {//Firefox t = e.detail; if (t < 0 && curIndex > 0) { //上滚动 movePrev(); } else if (t > 0 && curIndex < sumCount - 1) { //下滚动 moveNext(); } } }; function moveNext(){ container.css("transform", "translate3D(0, -" + (++curIndex) * $window.height() + "px, 0)"); } function movePrev(){ container.css("transform", "translate3D(0, -" + (--curIndex) * $window.height() + "px, 0)"); } function init(){ /*注册事件*/ if (document.addEventListener) { document.addEventListener('DOMMouseScroll', scrollFunc, false); }//W3C window.onmousewheel = document.onmousewheel = scrollFunc;//IE/Opera/Chrome //设置动画 container.css({ "transition": "all 0.5s", "-moz-transition": "all 0.5s", "-webkit-transition": "all 0.5s" }); } </script> In order to prevent the user from continuing to scroll and disrupting the rhythm when the page is scrolling, time can be used to force control, that is, during scrolling The moveNext and movePrev functions are not allowed to be called during this period. The final code is as follows:
<!DOCTYPE html><html><head lang="ch"> <meta charset="UTF-8"> <meta name=”viewport” content="width=device-width, user-scalable=no, initial-scale=1.0"> <title></title> <style> body, html{ padding: 0; margin: 0; } body, html { height: 100%; overflow: hidden; } #container, .section { height: 100%; } .section { background-color: #000; background-size: cover; background-position: 50% 50%; } #section0 { background-color: #83af9b; } #section1 { background-color: #764d39; } #section2 { background-color: #ff9000; } #section3 { background-color: #380d31; } </style></head><body><div id="container"> <div class="section" id="section0"></div> <div class="section" id="section1"></div> <div class="section" id="section2"></div> <div class="section" id="section3"></div></div><script src="http://code.jquery.com/jquery-latest.js"></script><script> var curIndex = 0; var container = $("#container"); var sumCount = $(".section").length; var $window = $(window); var duration = 500; //时间控制 var aniTime = 0; var scrollFunc = function (e) { //如果动画还没执行完，则return if(new Date().getTime() < aniTime + duration){ return; } e = e || window.event; var t = 0; if (e.wheelDelta) {//IE/Opera/Chrome t = e.wheelDelta; if (t > 0 && curIndex > 0) { //上滚动 movePrev(); } else if (t < 0 && curIndex < sumCount - 1) { //下滚动 moveNext(); } } else if (e.detail) {//Firefox t = e.detail; if (t < 0 && curIndex > 0) { //上滚动 movePrev(); } else if (t > 0 && curIndex < sumCount - 1) { //下滚动 moveNext(); } } }; function moveNext(){ //获取动画开始时的时间 aniTime = new Date().getTime(); container.css("transform", "translate3D(0, -" + (++curIndex) * $window.height() + "px, 0)"); } function movePrev(){ //获取动画开始时的时间 aniTime = new Date().getTime(); container.css("transform", "translate3D(0, -" + (--curIndex) * $window.height() + "px, 0)"); } function init(){ /*注册事件*/ if (document.addEventListener) { document.addEventListener('DOMMouseScroll', scrollFunc, false); }//W3C window.onmousewheel = document.onmousewheel = scrollFunc;//IE/Opera/Chrome container.css({ "transition": "all 0.5s", "-moz-transition": "all 0.5s", "-webkit-transition": "all 0.5s" }); } init(); </script></body></html>
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