时间:2021-07-01 10:21:17 帮助过:19人阅读
每日前端实战系列的全部源代码请从 github 下载:
https://github.com/comehope/front-end-daily-challenges
定义 dom,容器表示整只蝴蝶,因为蝴蝶是对称的,所以分为左右两边,每边有 3 个子元素:
- <div class="butterfly">
- <div class="left">
- <span></span>
- <span></span>
- <span></span>
- </div>
- <div class="right">
- <span></span>
- <span></span>
- <span></span>
- </div>
- </div>
居中显示:
- body {
- margin: 0;
- height: 100vh;
- display: flex;
- align-items: center;
- justify-content: center;
- background: linear-gradient(gray, lightyellow, gray);
- }
定义蝴蝶的尺寸:
- .butterfly {
- position: relative;
- width: 10em;
- height: 10em;
- }
先画左半边:
- .butterfly .left {
- position: absolute;
- width: inherit;
- height: inherit;
- }
用第 1 个子元素画出翅膀的上半部分:
- .butterfly span {
- position: absolute;
- border-radius: 50%;
- }
- .butterfly span:nth-child(1) {
- width: 5em;
- height: 7em;
- background-color: gold;
- }
用第 2 个子元素画出翅膀的下半部分:
- .butterfly span:nth-child(2) {
- width: 5.5em;
- height: 3.5em;
- background-color: orangered;
- top: 5em;
- left: -2.5em;
- filter: opacity(0.6);
- }
用第 3 个子元素画出触角:
- .butterfly span:nth-child(3) {
- width: 6em;
- height: 6em;
- border-right: 0.3em solid orangered;
- top: -0.5em;
- }
把左半边复制一份到右半边:
- .butterfly .right {
- position: absolute;
- width: inherit;
- height: inherit;
- }
- .butterfly .right {
- transform: rotateY(180deg) rotate(-90deg);
- top: 0.4em;
- left: 0.4em;
- }
把标本装到展示框里:
- .butterfly::before {
- content: '';
- position: absolute;
- box-sizing: border-box;
- top: -2.5em;
- left: -8em;
- width: 24em;
- height: 18em;
- background-color: black;
- border: 0.2em inset silver;
- }
- .butterfly::after {
- content: '';
- position: absolute;
- box-sizing: border-box;
- width: 40em;
- height: 30em;
- background-color: lightyellow;
- top: -9em;
- left: -16em;
- border: 2em solid burlywood;
- border-radius: 3em;
- box-shadow:
- 0 0.3em 2em 0.4em rgba(0, 0, 0, 0.3),
- inset 0.4em 0.4em 0.1em 0.5em rgba(0, 0, 0, .4);
- z-index: -1;
- }
最后,调整一下因图案倾斜引起的位移:
- .butterfly {
- transform: translateX(1em);
- }
大功告成!
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