效果预览
在线演示按下右侧的“点击预览”按钮可以在当前页面预览,点击链接可以全屏预览。
https://codepen.io/comehope/pen/ZoxjXm
可交互视频教程
此视频是可以交互的,你可以随时暂停视频,编辑视频中的代码。
请用 chrome, safari, edge 打开观看。
https://scrimba.com/p/pEgDAM/cmQwKAa
源代码下载
本地下载请从 github 下载。
https://github.com/comehope/front-end-daily-challenges/tree/master/018-stroke-morphing-404-effects
代码解读
定义 dom,容器中包含 3 个 <p>,每个 <p> 代表 1 个数字;每个 p 标签包含若干 <span>,每个 <span> 代表 1 个笔划:
<section class="four-zero-four">
<p class="four">
<span></span>
<span></span>
<span></span>
</p>
<p class="zero">
<span></span>
<span></span>
<span></span>
<span></span>
</p>
<p class="four">
<span></span>
<span></span>
<span></span>
</p>
</section>
居中显示:
html, body {
height: 100%;
display: flex;
align-items: center;
justify-content: center;
background: linear-gradient(gray, silver);
}
整体布局:
.four-zero-four p {
width: 10em;
height: 10em;
border: 1px dashed white;
display: inline-block;
margin: 1em;
position: relative;
}
设置笔划共有属性:
.four-zero-four p span {
position: absolute;
box-sizing: border-box;
filter: opacity(0.8);
}
画出数字 4 的笔划:
.four span:nth-child(1) {
width: 20%;
height: 80%;
left: 10%;
}
.four span:nth-child(2) {
width: 100%;
height: 20%;
bottom: 30%;
}
.four span:nth-child(3) {
width: 20%;
height: 100%;
right: 10%;
}
画出数字 0 的笔划:
.zero span:nth-child(1) {
width: 20%;
height: 100%;
left: 10%;
}
.zero span:nth-child(2) {
width: 100%;
height: 20%;
top: 10%;
}
.zero span:nth-child(3) {
width: 20%;
height: 100%;
right: 10%;
}
.zero span:nth-child(4) {
width: 100%;
height: 20%;
bottom: 10%;
}
给笔划上色:
.four span:nth-child(1) {
background-color: yellowgreen;
}
.four span:nth-child(2) {
background-color: turquoise;
}
.four span:nth-child(3) {
background-color: pink;
}
.zero span:nth-child(1) {
background-color: skyblue;
}
.zero span:nth-child(2) {
background-color: plum;
}
.zero span:nth-child(3) {
background-color: lightcoral;
}
.zero span:nth-child(4) {
background-color: peachpuff;
}
设置划过数字时笔划的变化效果:
.four-zero-four p:hover span {
border: 1px solid black;
background-color: transparent;
filter: opacity(1);
transition: 0.3s;
}
设置划过数字时笔划的偏移量:
.four:hover span:nth-child(1) {
left: 0;
}
.four:hover span:nth-child(2) {
bottom: 0;
}
.four:hover span:nth-child(3) {
right: 0;
}
.zero:hover span:nth-child(1) {
left: 0;
}
.zero:hover span:nth-child(2) {
top: 0;
}
.zero:hover span:nth-child(3) {
right: 0;
}
.zero:hover span:nth-child(4) {
bottom: 0;
}
最后,设置缓动时长:
.four-zero-four p span {
transition: 0.3s;
}
.four-zero-four p:hover span {
transition: 0.3s;
}
大功告成!