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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

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You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <div contenteditable="true" class="text effect01">前端开发whqet</div>
<div contenteditable="true" class="text effect02">前端开发whqet</div>
<div contenteditable="true" class="text effect03">前端开发whqet</div>
<div contenteditable="true" class="text effect04">前端开发whqet</div>
<div data-text="前端开发whqet" class="text effect05">前端开发whqet</div>
<div contenteditable="true" class="text effect06">前端开发whqet</div>
<div contenteditable="true" class="text effect07">前端开发whqet</div>
<div class="text effect08">
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
  <h1>前端开发whqet</h1>
</div>
<div contenteditable="true" class="text effect09">前端开发whqet</div>
!

CSS 

              
                body{
  background-color: #666;
}
@import url(https://fonts.googleapis.com/css?family=Dosis:500,800);
.text {
    font-family:"微软雅黑", "Dosis", sans-serif;
    font-size: 80px;
    text-align: center;
    font-weight: bold;
    line-height: 200px;
    text-transform:uppercase;
    position: relative;
}
.effect01{
    background-color: #333;
    color:#fefefe;
    text-shadow:
    0px 1px 0px #c0c0c0,
    0px 2px 0px #b0b0b0,
    0px 3px 0px #a0a0a0,
    0px 4px 0px #909090,
    0px 5px 10px rgba(0, 0, 0, 0.6);
}

.effect02{
  color:#333;
  background-color: #ddd;
  text-shadow:
    1px -1px 0 #767676, 
    -1px 2px 1px #737272, 
    -2px 4px 1px #767474, 
    -3px 6px 1px #787777, 
    -4px 8px 1px #7b7a7a, 
    -5px 10px 1px #7f7d7d, 
    -6px 12px 1px #828181, 
    -7px 14px 1px #868585, 
    -8px 16px 1px #8b8a89, 
    -9px 18px 1px #8f8e8d, 
    -10px 20px 1px #949392, 
    -11px 22px 1px #999897, 
    -12px 24px 1px #9e9c9c, 
    -13px 26px 1px #a3a1a1, 
    -14px 28px 1px #a8a6a6, 
    -15px 30px 1px #adabab, 
    -16px 32px 1px #b2b1b0, 
    -17px 34px 1px #b7b6b5,
    -18px 36px 1px #bcbbba, 
    -19px 38px 1px #c1bfbf, 
    -20px 40px 1px #c6c4c4, 
    -21px 42px 1px #cbc9c8, 
    -22px 44px 1px #cfcdcd;
}

.effect03{
  color: #202020;
  background-color: #2d2d2d;
  text-shadow: 
    -1px -1px 1px #111111,
    2px 2px 1px #363636;
}

.effect04{
  background-color: #333;
  background-image:
      linear-gradient(
        45deg,
        transparent 45%,
        hsla(48,20%,90%,1) 45%,
        hsla(48,20%,90%,1) 55%,
        transparent 0
        );
    background-size: .05em .05em;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: 2px #111;
}

.effect05{
  color:#DC554F;
  background-color:#27ae60;
  z-index: 3;
}
.effect05:before{
    content:attr(data-text);  
    width:100%;
    line-height:200px;
    opacity: .5;
    position: absolute;
    top:2px;
    left:5px;
    background-image:  
      linear-gradient(  
        45deg,  
        transparent 45%,  
        hsla(48,20%,90%,1) 45%,  
        hsla(48,20%,90%,1) 55%,  
        transparent 0  
        ); 
    z-index:-1;
    background-size: .05em .05em;  
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; 
    animation: shadowGo 20s linear infinite; 
}
@keyframes shadowGo{   
0% {background-position: 0 0}  
0% {background-position: -100% 100%}}; 

.effect06{
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: 2px #d6d6d6;
  background: url(http://www.pencilscoop.com/demos/CSS_Text_Effects/images/galaxy.jpg);
  background-size: cover;
}

.effect07{
  background: url(http://www.pencilscoop.com/demos/CSS_Text_Effects/images/galaxy.jpg) #333;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: cover;
  animation: 10s infinite linear animate;
}
.effect07:before{
  content:"";
  width:100%;
  height:100%;
  position: absolute;
  left:0;
  top:0;
  background-color: #999;
  z-index: -1;
}
@keyframes animate{
0% {background-position:0;}
100% {background-position:-1000px 0;}
}

.effect08{
  color:#fff;
  height:200px;
  transform-origin:center bottom;
  transform-style:preserve-3d;
  transition:all 1s;
  cursor: pointer;
}
.effect08:hover{
  transform:rotate3d(1,0,0,40deg);
}
.effect08 h1{
  position: absolute;
  left:0;
  right:0;
  margin:auto;
  text-shadow:0 0 10px rgba(0,0,100,.5);
}
@for $n from 1 to 8{
  .effect08 h1:nth-child(#{$n}){
    transform:translateZ(4px*$n);
  }
}

.effect09{
  background: 
    #acacac -webkit-gradient(linear, 100% 0, 0 0, from(#acacac), color-stop(0.5, #ffffff), to(#acacac));
  
  background-position: -4rem top; /*50px*/
  background-repeat: no-repeat;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 2.2s infinite;
  -webkit-background-size: 4rem 100%; /*50px*/
  position: relative;
}
/*这么个东东就是为了弄背景*/
.effect09:after{
  content:"";
  width:100%;
  height:100%;
  background: url(http://www.pencilscoop.com/demos/CSS_Text_Effects/images/galaxy.jpg);
  position: absolute;
  left:0;
  top:0;
  z-index: -1;
}
@-webkit-keyframes shimmer {
    0% {
        background-position: -4rem top;
    }
    70% {
        background-position: 30rem top; 
    }
    100% {
        background-position: 35rem top; 
    }
}
!

JS
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