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CSS3實現(xiàn)三角形不斷放大效果

一、CSS3三角形不斷放大特效

11.1 圖片預(yù)覽

11.2 index.html代碼

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<title>CSS3三角形不斷放大特效</title>
		<link rel="stylesheet" href="css/style.css">
	</head>
	<body>
		<div class="wrapper">
			<svg class="triangle-canvas" viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg">
				<polygon class="triangle triangle-1" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-2" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-3" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-4" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-5" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-6" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-7" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-8" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-9" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-10" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-11" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-12" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-13" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-14" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-15" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-16" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-17" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-18" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-19" points="500,200 759,650 241,650" />
				<polygon class="triangle triangle-20" points="500,200 759,650 241,650" />
			</svg>
		</div>
	</body>
</html>

11.3 style.css代碼

html {
	height: 100%;
}

body {
	padding: 0;
	margin: 0;
	height: 100%;
	background: #642B73;
	/* fallback for old browsers */
	/* Chrome 10-25, Safari 5.1-6 */
	background: linear-gradient(to left, #C6426E, #642B73);
	/* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

.wrapper {
	overflow: hidden;
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

.triangle-canvas {
	position: absolute;
	left: 50%;
	top: 50%;
	width: 100%;
	height: 100%;
	-webkit-transform: translate(-50%, -50%);
	transform: translate(-50%, -50%);
}

.triangle {
	fill: none;
	stroke: #fff;
	stroke-width: 15;
	-webkit-transform-origin: center center;
	transform-origin: center center;
	-webkit-animation: triangle-animation 10s linear infinite;
	animation: triangle-animation 10s linear infinite;
}

.triangle-1 {
	-webkit-animation-delay: 0s;
	animation-delay: 0s;
}

.triangle-2 {
	-webkit-animation-delay: -0.5s;
	animation-delay: -0.5s;
}

.triangle-3 {
	-webkit-animation-delay: -1s;
	animation-delay: -1s;
}

.triangle-4 {
	-webkit-animation-delay: -1.5s;
	animation-delay: -1.5s;
}

.triangle-5 {
	-webkit-animation-delay: -2s;
	animation-delay: -2s;
}

.triangle-6 {
	-webkit-animation-delay: -2.5s;
	animation-delay: -2.5s;
}

.triangle-7 {
	-webkit-animation-delay: -3s;
	animation-delay: -3s;
}

.triangle-8 {
	-webkit-animation-delay: -3.5s;
	animation-delay: -3.5s;
}

.triangle-9 {
	-webkit-animation-delay: -4s;
	animation-delay: -4s;
}

.triangle-10 {
	-webkit-animation-delay: -4.5s;
	animation-delay: -4.5s;
}

.triangle-11 {
	-webkit-animation-delay: -5s;
	animation-delay: -5s;
}

.triangle-12 {
	-webkit-animation-delay: -5.5s;
	animation-delay: -5.5s;
}

.triangle-13 {
	-webkit-animation-delay: -6s;
	animation-delay: -6s;
}

.triangle-14 {
	-webkit-animation-delay: -6.5s;
	animation-delay: -6.5s;
}

.triangle-15 {
	-webkit-animation-delay: -7s;
	animation-delay: -7s;
}

.triangle-16 {
	-webkit-animation-delay: -7.5s;
	animation-delay: -7.5s;
}

.triangle-17 {
	-webkit-animation-delay: -8s;
	animation-delay: -8s;
}

.triangle-18 {
	-webkit-animation-delay: -8.5s;
	animation-delay: -8.5s;
}

.triangle-19 {
	-webkit-animation-delay: -9s;
	animation-delay: -9s;
}

.triangle-20 {
	-webkit-animation-delay: -9.5s;
	animation-delay: -9.5s;
}

@-webkit-keyframes triangle-animation {
	0% {
		-webkit-transform: scale(0) rotate(0deg);
		transform: scale(0) rotate(0deg);
		opacity: 1;
	}

	100% {
		-webkit-transform: scale(3) rotate(45deg);
		transform: scale(3) rotate(45deg);
		opacity: 0;
	}
}

@keyframes triangle-animation {
	0% {
		-webkit-transform: scale(0) rotate(0deg);
		transform: scale(0) rotate(0deg);
		opacity: 1;
	}

	100% {
		-webkit-transform: scale(3) rotate(45deg);
		transform: scale(3) rotate(45deg);
		opacity: 0;
	}
}

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