前端用户体验优化： JS & CSS 各类效果代码段

前言

• 不定时更新
• 在线预览 https://zzyper.github.io/opti...
• 在线预览的源码 https://github.com/zzyper/opt...
• 部分内容仅兼容webkit内核，其他内核自行查询

可控密度的虚线分隔线 css

.line {
    height: 1px;
    width: 100%;
    transform: scaleY(0.4);
    -webkit-transform: scaleY(0.4);
    background-image: linear-gradient(to right, #ccc 0%, #ccc 50%, transparent 50%);
    background-size: 4px 1px;
    background-repeat: repeat-x;
}

• 通过更改background-size值控制密度展示
• 通过各属性x,y及方向转换实现横/纵向不同的分隔线

文字渐隐 css

.article{
    position: relative;
}

.mask{
    position: absolute;
    width:100%;
    bottom:0;
    left: 0;
    height: 60px;
    background: linear-gradient(top, rgba(255,255,255,0), #fff);
    background: -webkit-linear-gradient(top, rgba(255,255,255,0), #fff);
}

    春眠不觉晓<br />
    处处闻啼鸟<br />
    夜来风雨声<br />
    花落知多少
    <div class="mask"></div>
</div>

• 引导用户下方仍有内容，即将接近底部时将div.mask隐藏

弹窗禁止/恢复背景层滚动 css+js

window.onload = function(){
    document.getElementById('modalBtn').onclick = function (){switchModalStatus(true)};
    document.getElementById('modal').onclick = function (){switchModalStatus(false)};
}

function switchModalStatus(needShow){
    var modal = document.getElementById('modal');
    if(needShow){
        modal.style.display = 'block';
        disableBodyScroll();
    }else{
        modal.style.display = 'none';
        enableBodyScroll();
    }
}

function disableBodyScroll() {
    var body =  document.body;
    window.stTemp = Math.max(body.scrollTop, document.documentElement.scrollTop);
    body.style.overflow = "hidden";
    body.style.position = "fixed";
    body.style.top = (-window.stTemp+'px');
}

function enableBodyScroll() {
    var body =  document.body;
    body.style.overflow = "scroll";
    body.style.position = "static";
    body.style.top = '0px';
    body.scrollTop = window.stTemp;
    document.documentElement.scrollTop = window.stTemp;
}

.modal{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .5);
    z-index: 1;
}

.modal > .content{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    -webkit-transform: translateX(-50%) translateY(-50%);
    padding: 10px;
    width: 50%;
    background: white;
    border-radius: 12px;
}

<div >
    <div class="content">我是弹窗</div>
</div>

多行文字溢出显示省略号 css

.text {
    text-align: left;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

• -webkit-line-clamp控制显示的行数

原文地址：https://segmentfault.com/a/1190000016879135