Smooth-scrollbar.js滚动动画实例

smooth-scrollbar.js Scroll List Animation

scroll, list

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HTML
CSS
JavaScript
Result

编译

JavaScript

$(document).ready(function() {
    var Scrollbar = window.Scrollbar;

Scrollbar.use(window.OverscrollPlugin);

var customScroll = Scrollbar.init(document.querySelector('.js-scroll-list'), {
        plugins: {
            overscroll: true
        }
    });

var listItem = $('.js-scroll-list-item');

listItem.eq(0).addClass('item-focus');
    listItem.eq(1).addClass('item-next');

customScroll.addListener(function(status) {

var $content = $('.js-scroll-content');

var viewportScrollDistance = 0;

viewportScrollDistance = status.offset.y;
        var viewportHeight = $content.height();
        var listHeight = 0;
        var $listItems = $content.find('.js-scroll-list-item');
        for (var i = 0; i < $listItems.length; i++) {
            listHeight += $($listItems[i]).height();
        }

var top = status.offset.y;
        // console.log(top);
        var visibleCenterVertical = 0;
        visibleCenterVertical = top;

var parentTop = 1;
        var $lis = $('.js-scroll-list-item');
        var $focusLi;
        for (var i = 0; i < $lis.length; i++) {
            var $li = $($lis[i]);
            var liTop = $li.position().top;
            var liRelTop = liTop - parentTop;

var distance = 0;
            var distance = Math.abs(top - liRelTop);
            var maxDistance = $('.js-scroll-content').height() / 2;
            var distancePercent = distance / (maxDistance / 100);

if (liRelTop + $li.parent().scrollTop() > top) {
                if (!$li.hasClass('item-focus')) {
                    $li.prev().addClass('item-hide');
                    $lis.removeClass('item-focus');
                    $lis.removeClass('item-next');
                }
                $li.removeClass('item-hide');
                $li.addClass('item-focus');
                $li.next().addClass('item-next');
                break;
            }
        }
    });

});

编译

CSS

@import url("https://fonts.googleapis.com/css?family=Roboto:400,500,700,900&subset=latin-ext");
html {
    position: relative;
    overflow-x: hidden !important;
}
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    background: #f2f7fd;
}
a,
a:hover {
    text-decoration: none;
}
* {
    box-sizing: border-box;
}
.wrapper {
    display: flex;
    align-items: center;
    min-height: 100vh;
    background-image: linear-gradient(-225deg, #231557 0%, #44107A 29%, #FF1361 67%, #fa9b48 100%);
}
.scroll-list {
    width: 100%;
    max-width: 700px;
    padding: 25px;
    margin-top: 50px;
    margin-left: auto;
    margin-right: auto;
}
@media screen and (max-width: 768px) {
    .scroll-list {
        margin-top: 20px;
    }
}
.scroll-list__wrp {
    width: 100%;
    height: 700px;
    overflow: auto;
    padding: 50px;
    box-shadow: 0px 7px 46px 0px rgba(41, 53, 108, 0.45);
    background: #4b1079;
    background: #4b1079;
    margin-bottom: 15px;
    border-radius: 8px;
    background-image: linear-gradient(147deg, #6e0777 0%, #380c70 74%);
}
.scroll-list__wrp .scrollbar-track {
    display: none !important;
}
@media screen and (max-width: 768px) {
    .scroll-list__wrp {
        padding: 25px;
    }
}
.scroll-list__item {
    width: 100%;
    height: 155px;
    display: block;
    margin-bottom: 15px;
    border-radius: 8px;
    background-image: linear-gradient(147deg, #ff7c34 0%, #c31269 74%);
    transition: all .35s ease-in-out;
    opacity: 0;
    transform: scale(0.7);
    box-shadow: 0px 7px 16px 0px rgba(41, 53, 108, 0.25);
}
.scroll-list__item.item-hide {
    opacity: 0;
    transform: scale(0.7);
}
.scroll-list__item.item-focus {
    opacity: 1;
    transform: scale(1);
}
.scroll-list__item.item-next {
    opacity: 1;
    transform: scale(1);
}
.scroll-list__item.item-next + .scroll-list__item {
    opacity: 1;
    transform: scale(1);
}
.scroll-list__item:last-child {
    margin-bottom: 155px;
}

HTML

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编辑器支持Emmet

快捷键

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编辑器支持Emmet

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