在web项目中我们经常要使用时间轴(timeline)控件。本文提供一种基于CSS3的可逐项展开的timeline,在各展开项中可以嵌入文本、图片、视频等元素。运行效果如下:
实现
该控件的实现过程较为简单,主要由test.html文件和timeline.css文件组成。具体代码如下:
1、test.html文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="timeline.css"/>
<title>Timeline</title>
</head>
<body>
<div id='timeDiv'>
<ul id='timeline'>
<li class='work'>
<input class='radio' id='work1' name='works' type='radio' checked>
<div class="relative">
<label for='work1'>1、标题一</label>
<span class='date'>T1</span>
<span class='circle'></span>
</div>
<div class='content'>
<p>
长安元年(701年),李白,字太白。其生地今一般认为是唐剑南道绵州(巴西郡)昌隆(后避玄宗讳改为昌明)青莲乡。祖籍为甘肃天水。
其家世、家族皆不详。据《新唐书》记载,李白为兴圣皇帝(凉武昭王李暠)九世孙,按照这个说法李白与李唐诸王同宗,是唐太宗李世民的同辈族弟。
亦有说其祖是李建成或李元吉。
</p>
<p><img src="http://i.qulishi.com/UploadFile/2014-7/2014725171362.jpg" /></p>
</div>
</li>
<li class='work'>
<input class='radio' id='work2' name='works' type='radio'>
<div class="relative">
<label for='work2'>2、标题二</label>
<span class='date'>T2</span>
<span class='circle'></span>
</div>
<div class='content'>
<p>
神龙元年(705年), 十一月,武则天去世。李白五岁。发蒙读书始于是年。
《上安州裴长史书》云:“五岁诵六甲。”六甲,唐代的小学识字课本,长史,州之次官。
</p>
</div>
</li>
<li class='work'>
<input class='radio' id='work3' name='works' type='radio'>
<div class="relative">
<label for='work3'>3、标题三</label>
<span class='date'>T3</span>
<span class='circle'></span>
</div>
<div class='content'>
<p>
开元三年(715年),李白十五岁。
已有诗赋多首,并得到一些社会名流的推崇与奖掖,开始从事社会干谒活动。
亦开始接受道家思想的影响,好剑术,喜任侠。是年岑参生。
</p>
</div>
</li>
<li class='work'>
<input class='radio' id='work4' name='works' type='radio'>
<div class="relative">
<label for='work4'>4、标题四</label>
<span class='date'>T4</span>
<span class='circle'></span>
</div>
<div class='content'>
<p>
开元六年(718年),李白十八岁。
隐居戴天大匡山(在今四川省江油市内)读书。
往来于旁郡,先后出游江油、剑阁、梓州(州治在今四川省境内)等地,增长了不少阅历与见识。
</p>
</div>
</li>
</ul>
</div>
</body>
</html>
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2、timeline.css文件
#timeDiv{
max-width: 1200px;
margin: 0 auto;
padding: 0 5%;
font-size: 100%;
font-family: "Noto Sans", sans-serif;
color: black;
background: white;
}
/* -------------------------------------
* timeline
* ------------------------------------- */
#timeline {
list-style: none;
margin: 50px 0 30px 120px;
padding-left: 30px;
border-left: 8px solid gray;
}
#timeline li {
margin: 40px 0;
position: relative;
}
#timeline p {
margin: 0 0 15px;
}
.date {
margin-top: -10px;
top: 50%;
left: -80px;
font-size: 0.95em;
line-height: 20px;
position: absolute;
}
.circle {
margin-top: -15px;
top: 50%;
left: -49px;
width: 20px;
height: 20px;
background: white;
border: 5px solid gray;
border-radius: 50%;
display: block;
position: absolute;
}
.content {
max-height: 20px;
padding: 70px 20px 0;
border-color: transparent;
border-width: 2px;
border-style: solid;
border-radius: 0.5em;
position: relative;
}
.content:before, .content:after {
content: "";
width: 0;
height: 0;
border: solid transparent;
position: absolute;
pointer-events: none;
right: 100%;
}
.content:before {
border-right-color: inherit;
border-width: 20px;
top: 50%;
margin-top: -20px;
}
.content:after {
border-right-color: white;
border-width: 17px;
top: 50%;
margin-top: -17px;
}
.content p {
max-height: 0;
color: transparent;
text-align: justify;
word-break: break-word;
hyphens: auto;
overflow: hidden;
}
label {
font-size: 1.3em;
position: absolute;
z-index: 100;
cursor: pointer;
top: 35px;
transition: transform 0.2s linear;
font-weight: bold;
}
.radio {
display: none;
}
.radio:checked + .relative label {
cursor: auto;
transform: translateX(42px);
}
.radio:checked + .relative .circle {
background: red;
}
.radio:checked ~ .content {
max-height: 200000px;
border-color: lightgray;
margin-right: 20px;
transform: translateX(20px);
transition: max-height 0.4s linear, border-color 0.5s linear, transform 0.2s linear;
}
.radio:checked ~ .content p {
max-height: 200000px;
color: black;
transition: color 0.3s linear 0.3s;
}
/* -------------------------------------
* mobile phones (vertical version only)
* ------------------------------------- */
@media screen and (max-width: 767px) {
#timeline {
margin-left: 0;
padding-left: 0;
border-left: none;
}
#timeline li {
margin: 50px 0;
}
label {
width: 85%;
font-size: 1.1em;
white-space: nowrap;
text-overflow: ellipsis;
overflow: hidden;
display: block;
transform: translateX(18px);
}
.content {
padding-top: 60px;
border-color: #eee9dc;
}
.content:before, .content:after {
border: solid transparent;
bottom: 100%;
}
.content:before {
border-bottom-color: inherit;
border-width: 17px;
top: -16px;
left: 50px;
margin-left: -17px;
}
.content:after {
border-bottom-color: white;
border-width: 20px;
top: -20px;
left: 50px;
margin-left: -20px;
}
.content p {
font-size: 0.9em;
line-height: 1.4;
}
.circle, .date {
display: none;
}
}
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【参考文献】
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