CSS - 循环遍历单词

Question

我有以下使用 CSS 循环显示短语的简单布局。

.switch-text {
  position: relative;
}

.switch-text em {
  opacity: 0;
  font-style: normal;
  white-space: nowrap;
  position: absolute;
  left: 5px;
  animation-name: example;
  animation-duration: 3s;
  animation-iteration-count: infinite;
}

.switch-text em:nth-child(2) {
  animation-delay: 1s;
}

.switch-text em:nth-child(3) {
  animation-delay: 2s;
  opacity: 1;
}

@keyframes example {
  0% {
    opacity: 0;
  }
  33% {
    opacity: 0;
  }
  66% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

<span class="switch-text">
	<em>environment 1</em>
	<em>environment 2</em>
	<em>environment 3</em>
</span>

<br>
<br>
<hr>
<br>
<br>

<span class="switch-text">
	<em>environment 1</em>
	<em>environment 2</em>
	<em>environment 3</em>
    <em>environment 4</em>
	<em>environment 5</em>
	<em>environment 6</em>
</span>

我的顶级版本工作正常，但当我添加多个元素时，底部版本会重叠元素。

有人知道为什么吗？

Answer 1

由于您已将动画设置到第 3 级，因此您必须从第二个列表中删除 3 个列表。如果您需要更多，则必须相应地添加动画。

@import url('https://fonts.googleapis.com/css?family=Barlow');

body {
	background: #000; 
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	font-family: 'Barlow', sans-serif;
}
.container {
	width: 100%;
	position: relative;
	overflow: hidden;
}
a {
	text-decoration: none;
}
h1.main, p.demos {
	-webkit-animation-delay: 18s;
	-moz-animation-delay: 18s;
	-ms-animation-delay: 18s;
	animation-delay: 18s;
}
.sp-container {
	position: fixed;
	top: 0px;
	left: 0px;
	width: 100%;
	height: 100%;
	z-index: 0;
	background: -webkit-radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
	background: -moz-radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
	background: -ms-radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
	background: radial-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.3) 35%, rgba(0, 0, 0, 0.7));
}
.sp-content {
	position: absolute;
	width: 100%;
	height: 100%;
	left: 0px;
	top: 0px;
	z-index: 1000;
}
.sp-container h2 {
	position: absolute;
	top: 50%;
	line-height: 100px;
	height: 90px;
	margin-top: -50px;
	font-size: 90px;
	width: 100%;
	text-align: center;
	color: transparent;
	-webkit-animation: blurFadeInOut 3s ease-in backwards;
	-moz-animation: blurFadeInOut 3s ease-in backwards;
	-ms-animation: blurFadeInOut 3s ease-in backwards;
	animation: blurFadeInOut 3s ease-in backwards;
}
.sp-container h2.frame-1 {
	-webkit-animation-delay: 0s;
	-moz-animation-delay: 0s;
	-ms-animation-delay: 0s;
	animation-delay: 0s;
}
.sp-container h2.frame-2 {
	-webkit-animation-delay: 3s;
	-moz-animation-delay: 3s;
	-ms-animation-delay: 3s;
	animation-delay: 3s;
}
.sp-container h2.frame-3 {
	-webkit-animation-delay: 6s;
	-moz-animation-delay: 6s;
	-ms-animation-delay: 6s;
	animation-delay: 6s;
}
.sp-container h2.frame-4 {
	font-size: 200px;
	-webkit-animation-delay: 9s;
	-moz-animation-delay: 9s;
	-ms-animation-delay: 9s;
	animation-delay: 9s;
}
.sp-container h2.frame-5 {
	-webkit-animation: none;
	-moz-animation: none;
	-ms-animation: none;
	animation: none;
	color: transparent;
	text-shadow: 0px 0px 1px #fff;
}
.sp-container h2.frame-5 span {
	-webkit-animation: blurFadeIn 3s ease-in 12s backwards;
	-moz-animation: blurFadeIn 1s ease-in 12s backwards;
	-ms-animation: blurFadeIn 3s ease-in 12s backwards;
	animation: blurFadeIn 3s ease-in 12s backwards;
	color: transparent;
	text-shadow: 0px 0px 1px #fff;
}
.sp-container h2.frame-5 span:nth-child(2) {
	-webkit-animation-delay: 13s;
	-moz-animation-delay: 13s;
	-ms-animation-delay: 13s;
	animation-delay: 13s;
}
.sp-container h2.frame-5 span:nth-child(3) {
	-webkit-animation-delay: 14s;
	-moz-animation-delay: 14s;
	-ms-animation-delay: 14s;
	animation-delay: 14s;
}
.sp-globe {
	position: absolute;
	width: 282px;
	height: 273px;
	left: 50%;
	top: 50%;
	margin: -137px 0 0 -141px;
	background: transparent url(http://web-sonick.zz.mu/images/sl/globe.png) no-repeat top left;
	-webkit-animation: fadeInBack 3.6s linear 14s backwards;
	-moz-animation: fadeInBack 3.6s linear 14s backwards;
	-ms-animation: fadeInBack 3.6s linear 14s backwards;
	animation: fadeInBack 3.6s linear 14s backwards;
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=30)";
	filter: alpha(opacity=30);
	opacity: 0.3;
	-webkit-transform: scale(5);
	-moz-transform: scale(5);
	-o-transform: scale(5);
	-ms-transform: scale(5);
	transform: scale(5);
}
.sp-circle-link {
	position: absolute;
	left: 50%;
	bottom: 100px;
	margin-left: -50px;
	text-align: center;
	line-height: 100px;
	width: 100px;
	height: 100px;
	background: #fff;
	color: #3f1616;
	font-size: 25px;
	-webkit-border-radius: 50%;
	-moz-border-radius: 50%;
	border-radius: 50%;
	-webkit-animation: fadeInRotate 1s linear 16s backwards;
	-moz-animation: fadeInRotate 1s linear 16s backwards;
	-ms-animation: fadeInRotate 1s linear 16s backwards;
	animation: fadeInRotate 1s linear 16s backwards;
	-webkit-transform: scale(1) rotate(0deg);
	-moz-transform: scale(1) rotate(0deg);
	-o-transform: scale(1) rotate(0deg);
	-ms-transform: scale(1) rotate(0deg);
	transform: scale(1) rotate(0deg);
}
.sp-circle-link:hover {
	background: #85373b;
	color: #fff;
}
/**/

@-webkit-keyframes blurFadeInOut {
	0% {
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		-webkit-transform: scale(1.3);
	}
	20%, 75% {
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		-webkit-transform: scale(1);
	}
	100% {
		opacity: 0;
		text-shadow: 0px 0px 50px #fff;
		-webkit-transform: scale(0);
	}
}
@-webkit-keyframes blurFadeIn {
	0% {
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		-webkit-transform: scale(1.3);
	}
	50% {
		opacity: 0.5;
		text-shadow: 0px 0px 10px #fff;
		-webkit-transform: scale(1.1);
	}
	100% {
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		-webkit-transform: scale(1);
	}
}
@-webkit-keyframes fadeInBack {
	0% {
		opacity: 0;
		-webkit-transform: scale(0);
	}
	50% {
		opacity: 0.4;
		-webkit-transform: scale(2);
	}
	100% {
		opacity: 0.2;
		-webkit-transform: scale(5);
	}
}
@-webkit-keyframes fadeInRotate {
	0% {
		opacity: 0;
		-webkit-transform: scale(0) rotate(360deg);
	}
	100% {
		opacity: 1;
		-webkit-transform: scale(1) rotate(0deg);
	}
}
/**/

@-moz-keyframes blurFadeInOut {
	0% {
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		-moz-transform: scale(1.3);
	}
	20%, 75% {
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		-moz-transform: scale(1);
	}
	100% {
		opacity: 0;
		text-shadow: 0px 0px 50px #fff;
		-moz-transform: scale(0);
	}
}
@-moz-keyframes blurFadeIn {
	0% {
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		-moz-transform: scale(1.3);
	}
	100% {
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		-moz-transform: scale(1);
	}
}
@-moz-keyframes fadeInBack {
	0% {
		opacity: 0;
		-moz-transform: scale(0);
	}
	50% {
		opacity: 0.4;
		-moz-transform: scale(2);
	}
	100% {
		opacity: 0.2;
		-moz-transform: scale(5);
	}
}
@-moz-keyframes fadeInRotate {
	0% {
		opacity: 0;
		-moz-transform: scale(0) rotate(360deg);
	}
	100% {
		opacity: 1;
		-moz-transform: scale(1) rotate(0deg);
	}
}
/**/

@keyframes blurFadeInOut {
	0% {
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		transform: scale(1.3);
	}
	20%, 75% {
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		transform: scale(1);
	}
	100% {
		opacity: 0;
		text-shadow: 0px 0px 50px #fff;
		transform: scale(0);
	}
}
@keyframes blurFadeIn {
	0% {
		opacity: 0;
		text-shadow: 0px 0px 40px #fff;
		transform: scale(1.3);
	}
	50% {
		opacity: 0.5;
		text-shadow: 0px 0px 10px #fff;
		transform: scale(1.1);
	}
	100% {
		opacity: 1;
		text-shadow: 0px 0px 1px #fff;
		transform: scale(1);
	}
}
@keyframes fadeInBack {
	0% {
		opacity: 0;
		transform: scale(0);
	}
	50% {
		opacity: 0.4;
		transform: scale(2);
	}
	100% {
		opacity: 0.2;
		transform: scale(5);
	}
}
@keyframes fadeInRotate {
	0% {
		opacity: 0;
		transform: scale(0) rotate(360deg);
	}
	100% {
		opacity: 1;
		transform: scale(1) rotate(0deg);
	}
}

<div class="sp-container">
	<div class="sp-content">
		<div class="sp-globe"></div>
		<h2 class="frame-1">AWESOME</h2>
		<h2 class="frame-2">TEXT ANIMATION EFFECT</h2>
		<h2 class="frame-3">BUILD WITH CSS3</h2>
		<h2 class="frame-4">TEST IT!</h2>
		<h2 class="frame-5">
			<span>FORK,</span>
			<span>CHANGE,</span>
			<span>EXPERIANCE.</span>
		</h2>
	</div>
</div>