CSS3 achieves full screen switching effect_html/css_WEB-ITnose
Jun 24, 2016 am 11:42 AM
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"> <!--適配移動端--> <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%; /**隱藏滾動條**/ 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> //當前頁面索引 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) { //上滾動 movePrev(); } else if (t < 0 && curIndex < sumCount - 1) { //下滾動 moveNext(); } } else if (e.detail) {//Firefox t = e.detail; if (t < 0 && curIndex > 0) { //上滾動 movePrev(); } else if (t > 0 && curIndex < sumCount - 1) { //下滾動 moveNext(); } } }; function moveNext(){ } function movePrev(){ } function init(){ /*注冊事件*/ 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> //當前頁面索引 var curIndex = 0; //container元素 var container = $("#container"); //頁面總數 var sumCount = $(".section").length; //窗體元素 var $window = $(window); //動畫時間 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) { //上滾動 movePrev(); } else if (t < 0 && curIndex < sumCount - 1) { //下滾動 moveNext(); } } else if (e.detail) {//Firefox t = e.detail; if (t < 0 && curIndex > 0) { //上滾動 movePrev(); } else if (t > 0 && curIndex < sumCount - 1) { //下滾動 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(){ /*注冊事件*/ if (document.addEventListener) { document.addEventListener('DOMMouseScroll', scrollFunc, false); }//W3C window.onmousewheel = document.onmousewheel = scrollFunc;//IE/Opera/Chrome //設置動畫 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; //時間控制 var aniTime = 0; var scrollFunc = function (e) { //如果動畫還沒執(zhí)行完,則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) { //上滾動 movePrev(); } else if (t < 0 && curIndex < sumCount - 1) { //下滾動 moveNext(); } } else if (e.detail) {//Firefox t = e.detail; if (t < 0 && curIndex > 0) { //上滾動 movePrev(); } else if (t > 0 && curIndex < sumCount - 1) { //下滾動 moveNext(); } } }; function moveNext(){ //獲取動畫開始時的時間 aniTime = new Date().getTime(); container.css("transform", "translate3D(0, -" + (++curIndex) * $window.height() + "px, 0)"); } function movePrev(){ //獲取動畫開始時的時間 aniTime = new Date().getTime(); container.css("transform", "translate3D(0, -" + (--curIndex) * $window.height() + "px, 0)"); } function init(){ /*注冊事件*/ 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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