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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

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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).

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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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Packages

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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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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 

              
                <link href='https://fonts.googleapis.com/css?family=Lato:300,400,700' rel='stylesheet' type='text/css'>
<div id='stars'></div>
<div id='stars2'></div>
<div id='stars3'></div>
<div id='title'>
  <span>
    PURE CSS
  </span>
  <br>
  <span>
    PARALLAX PIXEL STARS
  </span>
</div>
!

CSS 

              
                html {
  height: 100%;
  background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
  overflow: hidden;
}

#stars {
  width: 1px;
  height: 1px;
  background: transparent;
  box-shadow: 483px 450px #FFF , 1995px 525px #FFF , 755px 1459px #FFF , 610px 1246px #FFF , 764px 1850px #FFF , 1274px 1697px #FFF , 1227px 37px #FFF , 1090px 506px #FFF , 341px 1005px #FFF , 1002px 755px #FFF , 693px 1497px #FFF , 1797px 1626px #FFF , 1838px 793px #FFF , 802px 881px #FFF , 1117px 1983px #FFF , 352px 1465px #FFF , 1526px 852px #FFF , 1559px 526px #FFF , 517px 516px #FFF , 1380px 244px #FFF , 662px 1531px #FFF , 1544px 518px #FFF , 253px 879px #FFF , 774px 1629px #FFF , 752px 994px #FFF , 1129px 726px #FFF , 232px 1050px #FFF , 1766px 290px #FFF , 1976px 842px #FFF , 662px 1535px #FFF , 257px 1016px #FFF , 665px 708px #FFF , 1476px 1772px #FFF , 261px 498px #FFF , 719px 1459px #FFF , 469px 438px #FFF , 994px 474px #FFF , 744px 808px #FFF , 1609px 1741px #FFF , 898px 260px #FFF , 1978px 1436px #FFF , 904px 1244px #FFF , 123px 773px #FFF , 6px 923px #FFF , 1973px 1778px #FFF , 1470px 1861px #FFF , 1037px 156px #FFF , 554px 1905px #FFF , 1508px 849px #FFF , 1213px 1603px #FFF , 87px 1907px #FFF , 492px 527px #FFF , 91px 213px #FFF , 492px 15px #FFF , 1357px 1157px #FFF , 637px 240px #FFF , 1515px 281px #FFF , 1757px 682px #FFF , 1035px 1298px #FFF , 1019px 1233px #FFF , 25px 162px #FFF , 262px 884px #FFF , 1328px 965px #FFF , 984px 879px #FFF , 1213px 689px #FFF , 623px 1091px #FFF , 1227px 422px #FFF , 1977px 1025px #FFF , 620px 474px #FFF , 528px 1525px #FFF;
  animation: animStar 50s linear infinite;
}
#stars:after {
  content: " ";
  position: absolute;
  top: 2000px;
  width: 1px;
  height: 1px;
  background: transparent;
  box-shadow: 483px 450px #FFF , 1995px 525px #FFF , 755px 1459px #FFF , 610px 1246px #FFF , 764px 1850px #FFF , 1274px 1697px #FFF , 1227px 37px #FFF , 1090px 506px #FFF , 341px 1005px #FFF , 1002px 755px #FFF , 693px 1497px #FFF , 1797px 1626px #FFF , 1838px 793px #FFF , 802px 881px #FFF , 1117px 1983px #FFF , 352px 1465px #FFF , 1526px 852px #FFF , 1559px 526px #FFF , 517px 516px #FFF , 1380px 244px #FFF , 662px 1531px #FFF , 1544px 518px #FFF , 253px 879px #FFF , 774px 1629px #FFF , 752px 994px #FFF , 1129px 726px #FFF , 232px 1050px #FFF , 1766px 290px #FFF , 1976px 842px #FFF , 662px 1535px #FFF , 257px 1016px #FFF , 665px 708px #FFF , 1476px 1772px #FFF , 261px 498px #FFF , 719px 1459px #FFF , 469px 438px #FFF , 994px 474px #FFF , 744px 808px #FFF , 1609px 1741px #FFF , 898px 260px #FFF , 1978px 1436px #FFF , 904px 1244px #FFF , 123px 773px #FFF , 6px 923px #FFF , 1973px 1778px #FFF , 1470px 1861px #FFF , 1037px 156px #FFF , 554px 1905px #FFF , 1508px 849px #FFF , 1213px 1603px #FFF , 87px 1907px #FFF , 492px 527px #FFF , 91px 213px #FFF , 492px 15px #FFF , 1357px 1157px #FFF , 637px 240px #FFF , 1515px 281px #FFF , 1757px 682px #FFF , 1035px 1298px #FFF , 1019px 1233px #FFF , 25px 162px #FFF , 262px 884px #FFF , 1328px 965px #FFF , 984px 879px #FFF , 1213px 689px #FFF , 623px 1091px #FFF , 1227px 422px #FFF , 1977px 1025px #FFF , 620px 474px #FFF , 528px 1525px #FFF;
}

#stars2 {
  width: 2px;
  height: 2px;
  background: transparent;
  box-shadow: 1585px 315px #FFF , 1750px 858px #FFF , 502px 1184px #FFF , 1482px 150px #FFF , 870px 93px #FFF , 1401px 1976px #FFF , 494px 1549px #FFF , 1607px 1894px #FFF , 1029px 1466px #FFF , 1931px 1390px #FFF , 819px 1431px #FFF , 521px 1062px #FFF , 1754px 574px #FFF , 577px 943px #FFF , 850px 1377px #FFF , 445px 1835px #FFF , 1658px 1675px #FFF , 521px 1144px #FFF , 560px 1624px #FFF , 1329px 1778px #FFF;
  animation: animStar 100s linear infinite;
}
#stars2:after {
  content: " ";
  position: absolute;
  top: 2000px;
  width: 2px;
  height: 2px;
  background: transparent;
  box-shadow: 1585px 315px #FFF , 1750px 858px #FFF , 502px 1184px #FFF , 1482px 150px #FFF , 870px 93px #FFF , 1401px 1976px #FFF , 494px 1549px #FFF , 1607px 1894px #FFF , 1029px 1466px #FFF , 1931px 1390px #FFF , 819px 1431px #FFF , 521px 1062px #FFF , 1754px 574px #FFF , 577px 943px #FFF , 850px 1377px #FFF , 445px 1835px #FFF , 1658px 1675px #FFF , 521px 1144px #FFF , 560px 1624px #FFF , 1329px 1778px #FFF;
}

#stars3 {
  width: 3px;
  height: 3px;
  background: transparent;
  box-shadow: 91px 409px #FFF , 1886px 728px #FFF , 1294px 970px #FFF , 720px 1215px #FFF , 796px 1431px #FFF , 834px 1217px #FFF , 1926px 1164px #FFF , 1803px 310px #FFF , 1532px 1421px #FFF , 1680px 232px #FFF;
  animation: animStar 150s linear infinite;
}
#stars3:after {
  content: " ";
  position: absolute;
  top: 2000px;
  width: 3px;
  height: 3px;
  background: transparent;
  box-shadow: 91px 409px #FFF , 1886px 728px #FFF , 1294px 970px #FFF , 720px 1215px #FFF , 796px 1431px #FFF , 834px 1217px #FFF , 1926px 1164px #FFF , 1803px 310px #FFF , 1532px 1421px #FFF , 1680px 232px #FFF;
}

#title {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  color: #FFF;
  text-align: center;
  font-family: "lato", sans-serif;
  font-weight: 300;
  font-size: 50px;
  letter-spacing: 10px;
  margin-top: -60px;
  padding-left: 10px;
}
#title span {
  background: -webkit-linear-gradient(white, #38495a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes animStar {
  from {
    transform: translateY(0px);
  }
  to {
    transform: translateY(-2000px);
  }
}
!

JS
!
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