时间:2021-07-01 10:21:17 帮助过:83人阅读
https://github.com/comehope/front-end-daily-challenges
定义 dom,只有 1 个元素:
<div class="loader"></div>
居中显示:
body { margin: 0; height: 100vh; display: flex; align-items: center; justify-content: center; background-color: teal; }
画出一根木条:
.loader { width: 6em; border-bottom: 0.25em solid white; font-size: 30px; border-radius: 0.125em; }
用伪元素在其上画出一个盒子:
.loader { position: relative; } .loader::before { content: ''; position: absolute; width: 1em; height: 1em; border: 0.25em solid white; bottom: 0; left: 0.5em; border-radius: 0.25em; }
让图案倾斜,形成盒子在坡上的效果:
.loader { transform: rotate(-45deg); left: 1em; top: 1em; }
接下来制作动画。
让盒子一步步爬坡,爬到坡顶再重爬:
.loader::before { animation: push 3s infinite; } @keyframes push { 0% { transform: translateX(0); } 20%, 25% { transform: translateX(1em); } 40%, 45% { transform: translateX(2em); } 60%, 65% { transform: translateX(3em); } 80% { transform: translateX(0); } }
增加盒子在爬坡的过程中的滚动效果:
@keyframes push { 0% { transform: translateX(0) rotate(0deg); } 20%, 25% { transform: translateX(1em) rotate(calc(90deg * 1)); } 40%, 45% { transform: translateX(2em) rotate(calc(90deg * 2)); } 60%, 65% { transform: translateX(3em) rotate(calc(90deg * 3)); } 80% { transform: translateX(0) rotate(0deg); } }
增加盒子在爬坡过程中的拟人效果:
@keyframes push { 0% { transform: translateX(0) rotate(0deg); } 5% { transform: translateX(0) rotate(-5deg); } 20%, 25% { transform: translateX(1em) rotate(calc(90deg * 1 + 5deg)); } 30% { transform: translateX(1em) rotate(calc(90deg * 1 - 5deg)); } 40%, 45% { transform: translateX(2em) rotate(calc(90deg * 2 + 5deg)); } 50% { transform: translateX(2em) rotate(calc(90deg * 2 - 5deg)); } 60%, 65% { transform: translateX(3em) rotate(calc(90deg * 3 + 5deg)); } 70% { transform: translateX(3em) rotate(calc(90deg * 3 - 5deg)); } 80% { transform: translateX(0) rotate(-5deg); } }
让木条在箱子爬到接近顶点时做抛掷动作:
.loader { animation: throw 3s infinite; transform-origin: 20%; } @keyframes throw { 0%, 70%, 100% { transform: rotate(-45deg); } 80% { transform: rotate(-135deg); } }
增加盒子在爬到接近顶点时的掉落效果:
@keyframes push { 70% { transform: translateX(3em) translateY(0) rotate(calc(90deg * 3 - 5deg)) scale(1); filter: opacity(1); } 80% { transform: translateX(0) translateY(-5em) rotate(-5deg) scale(0); filter: opacity(0.5); } 90% { transform: translateX(0) translateY(0) rotate(0deg) scale(0); } }
最后,隐藏掉可能超出页面的部分:
body { overflow: hidden; }
大功告成!
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