CSS3 animation implements 5 preload animation effects-CSS Tutorial-php.cn

Achieve the animation effect as shown in the picture:
CSS3动画实现5种预载动画效果

Preload animation 1: Double rotating circle

A circle rotating in two different directions. We define a CSS code for the speed of the inner ring, that is, the speed of the inner ring is 2 times faster than that of the outer ring.
The implementation is shown in the figure:
CSS3动画实现5种预载动画效果
html code:

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css code:

#preloader-1{ position: relative; } #preloader-1 span{ position: absolute; border:8px solid #fff; border-top:8px solid transparent; border-radius: 999px; } #preloader-1 span:nth-child(1){ width:80px; height: 80px; animation: spin-1 2s infinite linear; } #preloader-1 span:nth-child(2){ top:20px; left:20px; width:40px; height: 40px; animation: spin-2 1s infinite linear; } @keyframes spin-1{ 0%{transform: rotate(360deg); opacity: 1.0;} 50%{transform: rotate(180deg); opacity: 0.5;} 100%{transform: rotate(0deg);opacity: 0;} } @keyframes spin-2{ 0%{transform: rotate(0deg); opacity: 0.5;} 50%{transform: rotate(180deg); opacity: 1;} 100%{transform: rotate(360deg);opacity: 0.5;} }

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Preload animation two: staggered circle

The two circles move back and forth horizontally. Each circle has its own reverse movement animation parameters set.
Effect:
CSS3动画实现5种预载动画效果
html code:

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css code:

#preloader-2{ position: relative; } #preloader-2 span{ position: absolute; width:30px; height: 30px; background: #fff; border-radius: 999px; } #preloader-2 span:nth-child(1){ animation: cross-1 1.5s infinite linear; } #preloader-2 span:nth-child(2){ animation: cross-2 1.5s infinite linear; } @keyframes cross-1{ 0%{transform: translateX(0); opacity: 0.5;} 50%{transform: translateX(80px); opacity: 1;} 100%{transform: translateX(0);opacity: 0.5;} } @keyframes cross-2{ 0%{transform: translateX(80px); opacity: 0.5;} 50%{transform: translateX(0); opacity: 1;} 100%{transform: translateX(80px);opacity: 0.5;} }

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Preload animation three: rotating circle

Effect:
CSS3动画实现5种预载动画效果
html code:

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css code:

#preloader-3{ position: relative; width:80px; height: 80px; border:4px solid rgba(255,255,255,.25); border-radius: 999px; } #preloader-3 span{ position: absolute; width:80px; height:80px; border:4px solid transparent; border-top:4px solid #fff; border-radius: 999px; top:-4px; left:-4px; animation: rotate 1s infinite linear; } @keyframes rotate{ 0%{transform: rotate(0deg);} 100%{transform: rotate(360deg);} }

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Preload animation four: jumping circle

This is a Mexican wave pattern animation The effect is achieved by setting the delay parameters between different circles.
Effect:
CSS3动画实现5种预载动画效果
html code:

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css code:

#preloader-4{ position: relative; } #preloader-4 span{ position:absolute; width:16px; height: 16px; border-radius: 999px; background: #fff; animation: bounce 1s infinite linear; } #preloader-4 span:nth-child(1){ left:0; animation-delay: 0s; } #preloader-4 span:nth-child(2){ left:20px; animation-delay: 0.25s; } #preloader-4 span:nth-child(3){ left:40px; animation-delay: 0.5s; } #preloader-4 span:nth-child(4){ left:60px; animation-delay: 0.75s; } #preloader-4 span:nth-child(5){ left:80px; animation-delay: 1.0s; } @keyframes bounce{ 0%{transform: translateY(0px);opacity: 0.5;} 50%{transform: translateY(-30px);opacity: 1.0;} 100%{transform: translateY(0px);opacity: 0.5;} }

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Preload animation five: radar circle

A kind of radar For the radiation effect, set the same fade-in and fade-out effect for threespan elements, and then delay each one slightly to achieve it.
Effect:
CSS3动画实现5种预载动画效果
html code:

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css code:

#preloader-5{ position: relative; } #preloader-5 span{ position:absolute; width:50px; height: 50px; border:5px solid #fff; border-radius: 999px; opacity: 0; animation: radar 2s infinite linear; } #preloader-5 span:nth-child(1){ animation-delay: 0s; } #preloader-5 span:nth-child(2){ animation-delay: 0.66s; } #preloader-5 span:nth-child(3){ animation-delay: 1.33s; } @keyframes radar{ 0%{transform: scale(0);opacity: 0;} 25%{transform: scale(0);opacity: 0.5;} 50%{transform: scale(1);opacity: 1.0;} 75%{transform: scale(1.5);opacity: 0.5;} 100%{transform: scale(2);opacity: 0;} }

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