按钮悬停动画

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html

css

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html

css

:root {
	--bg: #3C465C;
	--primary: #78FFCD;
	--solid: #fff;
}
* {box-sizing: border-box;}
*:before, *:after {box-sizing: border-box;}

body {
	height: 100vh;
	display: -webkit-box;
	display: -ms-flexbox;
	display: flex;
	-webkit-box-pack: center;
	    -ms-flex-pack: center;
	        justify-content: center;
	-webkit-box-align: center;
	    -ms-flex-align: center;
	        align-items: center;
	-ms-flex-flow: wrap;
	    flex-flow: wrap;
	background: var(--bg);
	font-size: 20px;
	font-family: 'Titillium Web', sans-serif;
}
h1 {
	color: var(--solid);
	font-size: 2.5rem;
	margin-top: 6rem;	
}
.btn {
	position: relative;
	margin: 0 auto;
	width: 10em;
	color: var(--primary);
	border: .15em solid var(--primary);
	border-radius: 5em;
	text-transform: uppercase;
	text-align: center;
	font-size: 1.3em;
	line-height: 2em;
	cursor: pointer;	
}
.dot {
	content: '';
	position: absolute;
	top: 0;
	display: block;
	width: 20%;
	height: 100%;
	border-radius: 100%;
	-webkit-transition: all 300ms ease;
	transition: all 300ms ease;
	opacity: 0;
}
.dot:after {
	content: '';
	position: absolute;
	left: calc(50% - .4em);
	top: -.4em;
	height: .8em;
	width: .8em;
	background: var(--primary);
	border-radius: 1em;
	border: .25em solid var(--solid);
	box-shadow: 0 0 .7em var(--solid),
				0 0 2em var(--primary);
}
.btn:hover .dot,
.btn:focus .dot {
	-webkit-animation: atom 2s infinite linear;
	        animation: atom 2s infinite linear;
	opacity: 1;
}
@-webkit-keyframes atom {
	0% {-webkit-transform: translateX(0) rotate(0);transform: translateX(0) rotate(0);}
	25%{-webkit-transform: translateX(400%) rotate(0);transform: translateX(400%) rotate(0);}
	50% {-webkit-transform: translateX(400%) rotate(180deg);transform: translateX(400%) rotate(180deg);}
	75% {-webkit-transform: translateX(0) rotate(180deg);transform: translateX(0) rotate(180deg);}
	100% {-webkit-transform: translateX(0) rotate(360deg);transform: translateX(0) rotate(360deg);}
}
@keyframes atom {
	0% {-webkit-transform: translateX(0) rotate(0);transform: translateX(0) rotate(0);}
	25%{-webkit-transform: translateX(400%) rotate(0);transform: translateX(400%) rotate(0);}
	50% {-webkit-transform: translateX(400%) rotate(180deg);transform: translateX(400%) rotate(180deg);}
	75% {-webkit-transform: translateX(0) rotate(180deg);transform: translateX(0) rotate(180deg);}
	100% {-webkit-transform: translateX(0) rotate(360deg);transform: translateX(0) rotate(360deg);}
}

JavaScript

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