zeptoJS:如何像jQuery一样,让滚动变得优雅?
利用jQuery的animate() 方法，我们很容易实现滚动条的平滑滚动效果：
$(function() {
$('#top').click(
function (e) {
$('html, body').animate({scrollTop: '0px'}, 1000);
return false;
}
);
});
在线示例：利用jQuery实现的返回顶部
最近在做基于zeptoJS手机网页开发，遇到类似需求，实践之后发现zeptoJS并不像Jquery一样支持scrollTop()方法，
所以，即使引入使zeptoJS支持The animate()方法的 fx.js 之后,依然无法实现平滑滚动效果。
GOOGLE了一下发现，原来并不是我一人遇到这种问题，Stack Overflow早已有大量相关讨论：
以上讨论给出了很多解决方案，目前我采用了下面这种：
ZeptoScroll 插件
GitHub地址：https://github.com/suprMax/ZeptoScroll
官网地址：http://max.degterev.me/blog/zepto-scrolling
zepto.scroll.js
/* Author:
Max Degterev @suprMax
*/ ;(function($) {
var DEFAULTS = {
endY: $.os.android ? 1 : 0,
duration: 200,
updateRate: 15
}; var interpolate = function (source, target, shift) {
return (source + (target - source) * shift);
}; var easing = function (pos) {
return (-Math.cos(pos * Math.PI) / 2) + .5;
}; var scroll = function(settings) {
var options = $.extend({}, DEFAULTS, settings); if (options.duration === 0) {
window.scrollTo(0, options.endY);
if (typeof options.callback === 'function') options.callback();
return;
} var startY = window.pageYOffset,
startT = Date.now(),
finishT = startT + options.duration; var animate = function() {
var now = Date.now(),
shift = (now > finishT) ? 1 : (now - startT) / options.duration; window.scrollTo(0, interpolate(startY, options.endY, easing(shift))); if (now < finishT) {
setTimeout(animate, options.updateRate);
}
else {
if (typeof options.callback === 'function') options.callback();
}
}; animate();
}; var scrollNode = function(settings) {
var options = $.extend({}, DEFAULTS, settings); if (options.duration === 0) {
this.scrollTop = options.endY;
if (typeof options.callback === 'function') options.callback();
return;
} var startY = this.scrollTop,
startT = Date.now(),
finishT = startT + options.duration,
_this = this; var animate = function() {
var now = Date.now(),
shift = (now > finishT) ? 1 : (now - startT) / options.duration; _this.scrollTop = interpolate(startY, options.endY, easing(shift)); if (now < finishT) {
setTimeout(animate, options.updateRate);
}
else {
if (typeof options.callback === 'function') options.callback();
}
}; animate();
}; $.scrollTo = scroll; $.fn.scrollTo = function() {
if (this.length) {
var args = arguments;
this.forEach(function(elem, index) {
scrollNode.apply(elem, args);
});
}
};
}(Zepto));
DEMO:
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"> <title>ZeptoScroll</title>
<style type="text/css"> #main{
font: normal 13px/1.4em Helvetica, Arial, sans-serif;
width: 96%;
padding: 2%;
max-width: 320px;
margin: 0 auto;
background-color: #f5f5f5;
color:#666;
} #top {
display: inline-block;
padding: 6px 0;
color: #fff;
width: 100%;
cursor: pointer;
text-align: center;
border-radius: 3px;
background-color: #00bb9c;
text-decoration: none;
}
</style>
</head>
<body>
<div id="main">
<h1>Add some gold.</h1>
<p>Look what I'm dealing with, man. I'm dealing with fools and trolls. I'm dealing with soft targets, and it's just strafing runs in my underwear before my first cup of coffee … they lay down with their ugly wives and their ugly children and just look at their loser lives and then they look at me and say, 'I can't process it.' Well, no, and you never will! Stop trying! Just sit back and enjoy the show.</p> <p>I am on a drug. It's called Charlie Sheen. It's not available. If you try it once, you will die. Your face will melt off and your children will weep over your exploded body.</p> <p>It's being directed and written by a genius named David Ward who, I don't know, won the Academy Award at 23 for writing The Sting?
It was his pen and his vision that created the classic that we know today as Major League. In fact,
a lot of people think the movie's called Wild Thing, as they should. Whatever … If they want me in it, it's a smash. If they don't, it's a turd that opens on a tugboat.</p> <p>I tried marriage. I'm 0 for 3 with the marriage thing. So, being a ballplayer — I believe in numbers. I'm not going 0 for 4. I'm not wearing a golden sombrero.</p>
<p>Look what I'm dealing with, man. I'm dealing with fools and trolls.
I'm dealing with soft targets, and it's just strafing runs in my underwear before my first cup of coffee …
they lay down with their ugly wives and their ugly children and just look at their loser lives and then they look at me and say, 'I can't process it.' Well, no, and you never will! Stop trying! Just sit back and enjoy the show.</p> <p>I am on a drug. It's called Charlie Sheen. It's not available. If you try it once, you will die. Your face will melt off and your children will weep over your exploded body.</p> <a id="top" href="javascript:void(0);">To the top, please!</a>
</div> <script src="http://libs.baidu.com/zepto/0.8/zepto.min.js"></script>
<script src="static/zepto.scroll.js"></script>
<script type="text/javascript">
$('#top').on('click', function(e) {
$.scrollTo({
endY: 0,
duration: 200,
callback: function() {
alert('at the top');
}
});
});
</script>
</body>
</html>
zeptoJS:如何像jQuery一样,让滚动变得优雅?的更多相关文章
- jQuery全能图片滚动插件
插件开发背景 随着前端开发领域越来越受到重视,前端开发也变得越来越火热.各种优秀的前端组件层出不穷.尤其是jQuery插件,很多前端组件都是基于jQuery开开发的. 图片滚动是前端开发中可以说是非常 ...
- 精心挑选10款优秀的 jQuery 图片左右滚动插件
在现代的网页设计中,图片和内容滑块是一种极为常见和重要的元素.你可以从头开始编写自己的滑动效果,但是这将浪费很多时间,因为网络上已经有众多的优秀的 jQuery 滑块插件.当然,如果要从大量的 jQu ...
- 【jQuery】scroll 滚动到顶部
Jquery 实现页面滚动到顶端 $(document).ready(function () { // 滚动窗口来判断按钮显示或隐藏 $(window).scroll(function () { // ...
- jQuery BreakingNews 间歇滚动
BreakingNews 是一款基于jQuery的间歇滚动插件.它可以设置标题.标题颜色.标题背景颜色.链接颜色.字体大小.边框.宽度.自动滚动.间歇时间等等,同时它还好提供两种过度方式--淡入淡出( ...
- Infinite Scroll - jQuery & WP 无限滚动插件
无限滚动(Infinite Scroll)也称为自动分页.滚动分页和无限分页.常用在图片.文章或其它列表形式的网页中,用来在滚动网页的时候自动加载下一页的内容.Infinite Scroll 这款 ...
- jQuery图片无缝滚动JS代码ul/li结构
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/ ...
- jquery文字左右滚动
实现jquery文字左右滚动 <div class="fl">中奖名单:</div> <div class="scrollText" ...
- jQuery图片无缝滚动
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/ ...
- jQuery.hhLRSlider 左右滚动图片插件
/** * jQuery.hhLRSlider 左右滚动图片插件 * User: huanhuan * QQ: 651471385 * Email: th.wanghuan@gmail.com ...
随机推荐
- [Linux]三种方案在Windows系统下安装ubuntu双系统（转）
在学习linux的过程中,ubuntu无疑是初学者的最佳选择. 下面来列举给Windows系统安装ubuntu双系统的三种方法. 一.虚拟机安装(不推荐) 使用工具:Vmware 如果不是因为迫不得已 ...
- springxml配置构造函数入参
springxml配置构造函数入参有深入的理解 集合mockito创建对象的方法.功能等同于创建对象的代码. spring配置文件中定义bean的好处 便于集中管理,系统任何地方都可以引用使用.如果不 ...
- Redis，MemCached，MongoDB 概述
调研项目主要有Redis. MemCached. MongoDB,以及Amazon的DynamoDB Redis 是一个开源的使用ANSI C语言编写.支持网络.可基于内存亦可持久化的日志型.Key- ...
- hbase region 分配方式
参与 Region 分配的重要对象 在 Region 分配过程中,起着重要作用有如下一些对象. HMaster— 是 HBase 中的 Master server ,仅有一个. HRegionServ ...
- 最新 xode shareSDK使用分享
shareSDK使用分享 什么是shareSDK ShareSDK实现第三方登录.分享.关注等功能. 为什么使用 快速,方便 如何使用 (1)官方下载ShareSDK 参照 ...
- 用C#实现的条形码和二维码编码解码器
本文主要介绍可以在C#中使用的1D/2D编码解码器.条形码的应用已经非常普遍,几乎所有超市里面的商品上面都印有条形码:二维码也开始应用到很多场合,如火车票有二维码识别.网易的首页有二维码图标,用户只需 ...
- C# 操作电脑 关机 重启 注销 休止 休眠
// 关机 强制电脑10秒之内关机 //System.Diagnostics.Process.Start("shutdown", "-s -f -t 10"); ...
- oracle 集合运算符
aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAY4AAACNCAIAAAAvhQoxAAAbmklEQVR4nO1dX6jc1pn/0lBH4KVV6J ...
- Java中的HashMap和Hashtable
代码: import java.util.*; public class test{ public static void main(String[] args) { HashMap hm = new ...
- storm-kafka教程
一.原理介绍 本文内容参考:https://github.com/apache/storm/tree/master/external/storm-kafka#brokerhosts (一)使用st ...