CSS和JS实现动态华丽的奥运五环效果预览
实现方法
HTML代码
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CSS代码
html,
body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
body {
background: #8e9eab;
background: linear-gradient(toleft,#8e9eab, #eef2f3);
font-family: 'Raleway',sans-serif;
}
.container {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
width: 100%;
}
.all {
fill: none;
stroke-miterlimit: 10;
stroke-width: 5px;
stroke: none;
}
JS代码
1.引用「TweenMax.min.js」，点击下载TweenMax.min.js
2.添加js脚本
var count = 5;
var circles = [];
var lines = [];
var colors = ['#0084c7', '#f2c418', '#000', '#00a24a', '#e01e26'];
var reverse = [false, false, false, true, true];
for (var i = 1; i <= count; i++) {
var circle = document.getElementById("c" + i);
var circleLength = circle.getTotalLength();
circle.style.strokeDasharray = circleLength + ' ' + circleLength;
circle.style.stroke = colors[i - 1];
circles.push({
node: circle,
length: circleLength
});
var path = document.getElementById("p" + i);
var pathLength = path.getTotalLength();
path.style.strokeDasharray = circleLength + ' ' + pathLength;
lines.push({
node: path,
length: pathLength
})
}
var speed = 2.5;
var delay = speed - 0.12;
var delayStep = 0.2;
animate();
document.onclick = animate;
function animate() {
TweenMax.killAll();
for (var i = 0; i < count; i++) {
var path = lines[i].node;
var stagger = i * delayStep;
path.style.strokeDashoffset = lines[i].length;
path.style.stroke = '#fff'; //colors[i];
path.style.opacity = 0;
path.style.strokeWidth = Math.random() * 15;
TweenMax.to(path, speed, {
delay: stagger,
stroke: colors[i],
strokeWidth: 5,
opacity: 1,
strokeDashoffset: -lines[i].length,
ease: Power1.easeIn
});
var circle = circles[i].node;
circle.style.strokeDashoffset = reverse[i] ? -circles[i].length : circles[i].length
TweenMax.to(circle, speed / 4, {
delay: stagger + delay,
strokeDashoffset: 0,
ease: Power2.easeOut
});
}
}
