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发光文字动画效果：

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<title>jQuery+CSS3彩色霓虹灯发光文字动画特效</title>

<script src="js/jquery.min.js"></script>

<style>

body {

  height: 100vh;

  box-sizing: border-box;

  background: #333;

  display: flex;

  flex-direction: column;

  justify-content: center;

  align-items: center;

  overflow-y: hidden;

}

body p{

  color: #555;

  font-family: 'Quicksand', sans-serif;

  font-weight: 900;

}

body p i{

  transition: .5s;

}

.fa-codepen{

   -webkit-animation: fade 3s infinite alternate;

  -moz-animation: fade 3s infinite alternate;

  -o-animation: fade 3s infinite alternate;

  animation: fade 3s infinite alternate;

}

a{

  color: #ddd;

}

span {

  font-size: 6em;

  font-family: "Quicksand", sans-serif;

  font-weight: 500;

  color: #ddd;

  transition: .25s;

}

.pink {

  position: absolute;

  text-shadow:

    2px 2px 1px rgba(0,0,0,.4),

    0 0 20px #fe3a80,

    0 0 40px rgba(255, 0, 91, .75),

    0 0 50px rgba(255, 0, 91, .75),

    0 0 100px rgba(255, 0, 91, .75);

}

.pink:before{

  content:'';

  position: absolute;

  background: rgba(254, 58, 128, .25);

  z-index: -1;

  opacity: .7;

  filter: blur(50px);

  width: 100%;

  height: 100%;

}

.green {

  position: absolute;

   text-shadow: 2px 2px 1px rgba(0,0,0,.4),

    0 0 20px #69F0AE,

    0 0 40px rgba(0, 230, 118, .75),

    0 0 50px rgba(0, 230, 118, .75),

    0 0 100px rgba(0, 230, 118, .75);

}

.green:before{

  content:'';

  position: absolute;

  background: rgba(105, 240, 174, .25);

  z-index: -1;

  opacity: .7;

  filter: blur(30px);

  width: 100%;

  height: 100%;

}

.blue {

  position: absolute;

  text-shadow:

  2px 2px 1px rgba(0,0,0,.4),

  0 0 20px #42A5F5,

  0 0 40px rgba(33, 150, 243, .75),

  0 0 50px rgba(33, 150, 243, .75),

  0 0 60px rgba(33, 150, 243, .75);

}

.blue:before{

  content:'';

  position: absolute;

  background: rgba(66, 165, 245, .25);

  z-index: -1;

  opacity: .7;

  filter: blur(30px);

  width: 100%;

  height: 100%;

}

.buttons{

  margin-bottom: auto;

  margin-top: 20px;

}

button{

  margin: 0 5px;

  padding: 10px;

  letter-spacing: 1px;

  background: none;

  border: 2px solid #444;

  height: 2.25em;

  border-radius: 2.25em;

  color: #444;

  font-size: 1.25em;

  font-weight: bold;

  text-transform: uppercase;

  transition: .5s;

  outline: none;

}

button:nth-child(1):hover{

  /*Green*/

  color: #00E676;

  text-shadow: 0 0 7px #00E676;

  border-color: #00E676;

  box-shadow: 0 0 15px #00E676, inset 0 0 15px #00E676;

}

button:nth-child(2):hover{

  /*Pink*/

  color: #ff005b;

  text-shadow: 0 0 7px #ff005b;

  border-color: #ff005b;

  box-shadow: 0 0 15px #ff005b, inset 0 0 15px #ff005b;

}

button:nth-child(3):hover{

  /*Blue*/

  color: #2196F3;

  text-shadow: 0 0 7px #2196F3;

  border-color: #2196F3;

  box-shadow: 0 0 15px #2196F3, inset 0 0 15px #2196F3;

}

/*Animation*/

@-moz-keyframes fade {

  40% {

    opacity: 0.8;

  }

  42% {

    opacity: 0.1;

  }

  43% {

    opacity: 0.8;

  }

  45% {

    opacity: 0.1;

  }

  46% {

    opacity: 0.8;

  }

}

@-webkit-keyframes fade {

  40% {

    opacity: 0.8;

  }

  42% {

    opacity: 0.1;

  }

  43% {

    opacity: 0.8;

  }

  45% {

    opacity: 0.1;

  }

  46% {

    opacity: 0.8;

  }

}

@-o-keyframes fade {

  40% {

    opacity: 0.8;

  }

  42% {

    opacity: 0.1;

  }

  43% {

    opacity: 0.8;

  }

  45% {

    opacity: 0.1;

  }

  46% {

    opacity: 0.8;

  }

}

@keyframes fade {

  40% {

    opacity: 0.8;

  }

  42% {

    opacity: 0.1;

  }

  43% {

    opacity: 0.8;

  }

  45% {

    opacity: 0.1;

  }

  46% {

    opacity: 0.8;

  }

}

</style>

</head>

<body><script src="/demos/googlegg.js"></script>

<link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Quicksand">

<script src="js/typed.min.js"></script>

<div class="buttons">

  <button onClick="colorChange(colors[0][0],colors[0][1] )">Green</button>

  <button onClick="colorChange(colors[2][0], colors[2][1])">Pink</button>

  <button onClick="colorChange(colors[1][0], colors[1][1])">

    Blue

  </button>

</div>

<div id="typedStrings">

  <p>Welcome!</p>

  <p>Gary</p>

  <p>欢迎O(∩_∩)O~</p>

</div>

<span id="span"></span>

<script type="text/javascript">

$("#span").typed({

  stringsElement: $("#typedStrings"),

  typeSpeed: 70,

  showCursor: false,

  contentType: "html"

});

var colors = [["green","#00E676"], ["blue","#2196F3"], ["pink", "#ff005b"]];

var randomColor = colors[Math.floor(Math.random() * colors.length)];

var initialColor = randomColor[0];

var initialHeartColor = randomColor[1];

function colorChange(color, heart){

  $('#span').attr('class', '').addClass(color);

  $('body p i').css('color', initialHeartColor);

  $('body p i').css('color', heart);

}

colorChange(initialColor);

</script>

</div>

</body>

</html>

index.html

实现过程：

CSS样式

body {

  height: 100vh;

  box-sizing: border-box;

  background: #333;

  display: flex;

  flex-direction: column;

  justify-content: center;

  align-items: center;

  overflow-y: hidden;

}

justify-content：在弹性盒对象的 <div> 元素中的各项周围留有空白　　传送门

overflow-y：属性规定是否对内容的上/下边缘进行裁剪

　参数hidden：裁剪内容 - 不提供滚动机制　　传送门

animation：将动画与 div 元素绑定　　传送门

text-shadow：向文本设置阴影　　传送门

opacity：value　　规定不透明度。从 0.0 （完全透明）到 1.0（完全不透明）　　传送门

filter ：定义了元素模糊与饱和度　　传送门

三个按钮CSS样式

button:nth-child(1):hover{

  /*Green*/

  color: #00E676;

  text-shadow: 0 0 7px #00E676;

  border-color: #00E676;

  box-shadow: 0 0 15px #00E676, inset 0 0 15px #00E676;

}

button:nth-child(2):hover{

  /*Pink*/

  color: #ff005b;

  text-shadow: 0 0 7px #ff005b;

  border-color: #ff005b;

  box-shadow: 0 0 15px #ff005b, inset 0 0 15px #ff005b;

}

button:nth-child(3):hover{

  /*Blue*/

  color: #2196F3;

  text-shadow: 0 0 7px #2196F3;

  border-color: #2196F3;

  box-shadow: 0 0 15px #2196F3, inset 0 0 15px #2196F3;

}

text-shadow：向文本设置阴影　　传送门

border-color： 设置4 个边框的颜色　　传送门

1个参数

border-color:red;

所有 4 个边框都是红色

2个参数

border-color:dotted red green;

上边框和下边框是红色

右边框和左边框是绿色

border-color:red green blue;

上边框是红色

右边框和左边框是绿色

下边框是蓝色

border-color:red green blue pink;

上边框是红色

右边框是绿色

下边框是蓝色

左边框是粉色

border-color参数属性值

box-shadow：设置一个或多个下拉阴影的框　　传送门

opacity：设置 div 元素的不透明级别　　传送门

(制作彩色霓虹灯发光文字动画关键！)

引入typed.js并添加自定义改变颜色函数colorChange(color, heart)

<script type="text/javascript">

$("#span").typed({

  stringsElement: $("#typedStrings"),

  typeSpeed: 70,

  showCursor: false,

  contentType: "html"

});

var colors = [["green","#00E676"], ["blue","#2196F3"], ["pink", "#ff005b"]];

var randomColor = colors[Math.floor(Math.random() * colors.length)];

var initialColor = randomColor[0];

var initialHeartColor = randomColor[1];

function colorChange(color, heart){

  $('#span').attr('class', '').addClass(color);

  $('body p i').css('color', initialHeartColor);

  $('body p i').css('color', heart);

}

colorChange(initialColor);

</script>

将按钮绑定js事件

<div class="buttons">

  <button onClick="colorChange(colors[0][0],colors[0][1] )">Green</button>

  <button onClick="colorChange(colors[2][0], colors[2][1])">Pink</button>

  <button onClick="colorChange(colors[1][0], colors[1][1])">Blue</button>

</div>

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