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HTML

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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

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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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HTML 

              
                <div id="loop"></div>
!

CSS 

              
                // #divtober 04: Loop
// a.singlediv.com/divtober2021

black(alpha)
  rgba(0,0,0,alpha)

white(alpha)
  rgba(255,255,255,alpha)

body
  min-height: 300px
  height: 100vh
  position: relative
  background-color: #ccc
  text-align: center

div
  position: absolute
  left: 50%
  top: 50%

  &:before,
  &:after
    display: block
    content: ''
    position: absolute
    box-sizing: border-box

#loop
  box-sizing: border-box
  width: 14em
  height: 4.5em
  margin-left: -(@width/2)
  margin-top: -(@height/2)
  background-color: #444
  background-repeat: no-repeat
  background-image: repeating-linear-gradient(white(0), white(0) 3px,
                                                        white(.5) 3px, white(.5) 4px),
                    linear-gradient(black, black),
                    linear-gradient(crimson, crimson),
                    linear-gradient(white(.3), white(.3)),
                    linear-gradient(white(.3), white(.3)),
                    linear-gradient(white(.3), white(.3)),
                    linear-gradient(white(.3), white(.3)),
                    repeating-linear-gradient(to right, white(0), white(0) 3px,
                                                        white(.6) 3px, white(.6) 5px,
                                                        white(0) 5px, white(0) 7px),
                    linear-gradient(black, black)
  background-size: .4em 2em,
                    1em 2.3em,
                    .1em 1.4em,
                    .4em .1em, .4em .1em,
                    3em .1em, 3em .1em,
                    5em .1em,
                    5em 2.3em
  background-position: 1.3em 51.3%,
                       .9em 51.5%,
                       70% 65%,
                       61% 50%, 61% 60%,
                       85% 50%, 85% 60%,
                       90% 73%,
                       90% 51.3%
  border-radius: .6em
  border: 3px solid white
  box-shadow: 0 0 0 2px #aaa,
              inset 0 0 0 5px #777

  &:before
    content: '6 00'
    padding: .25em .3em .2em .4em
    display: flex
    align-items: center
    left: 1.4em
    top: .56em
    background-color: black
    background-repeat: no-repeat
    background-image: linear-gradient(#444, #444),
                      linear-gradient(#444, #444),
                      linear-gradient(#444, #444)
    background-size: .7em 80%
    background-position: .3em 50%, 1.3em 50%, 2.06em 50%
    border-radius: 3px
    font-family: Impact, Avenir Next Condensed Demi Bold, Arial, sans-serif
    font-size: 26px
    letter-spacing: 4px
    color: white

  &:after
    content: 'Panasonic'
    width: 16rem
    height: 7rem
    padding-top: 2.2rem
    padding-right: 2.3rem
    left: 50%
    margin-left: -(@width/2)
    top: -1rem
    background-repeat: no-repeat
    background-image: linear-gradient(white, white), linear-gradient(#aaa, #aaa),
                      linear-gradient(white, white), linear-gradient(#aaa, #aaa),
                      linear-gradient(white, white), linear-gradient(#aaa, #aaa),
                      linear-gradient(white, white), linear-gradient(#aaa, #aaa),
                      repeating-linear-gradient(white(0), white(0) 2px,
                                                          #aaa 2px, #aaa 3px),
                      linear-gradient(white, white), linear-gradient(#aaa, #aaa),
                      repeating-linear-gradient(white(0), white(0) 2px,
                                                          #aaa 2px, #aaa 3px),
                      linear-gradient(white, white), linear-gradient(#aaa, #aaa),
                      linear-gradient(#aaa, #aaa),
                      linear-gradient(60deg, white(0) 35%, #aaa 35.1%, #aaa 36.7%, white 36.8%),
                      linear-gradient(-60deg, white(0) 35%, #aaa 35.1%, #aaa 36.7%, white 36.8%),
                      radial-gradient(ellipse, black(.1) 60%, black(0) 63%),
                      linear-gradient(black, black)
    background-size: 20px 4px, 24px 6px,
                     15px 3px, 19px 5px,
                     4px 30px, 6px 34px,
                     4px 30px, 6px 34px,
                     10px 10px,
                     10px 10px, 12px 14px,
                     10px 10px,
                     10px 10px, 12px 14px,
                     59% 2px,
                     55% 15px, 55% 15px,
                     100% 20%,
                     5rem 1px
    background-position: 40px 7px, 38px 5px,
                         190px 8px, 188px 6px,
                         10px 36px, 8px 34px,
                         calc(100% - 10px) 36px, calc(100% - 8px) 34px,
                         2px 46px,
                         2px 46px, 0 44px,
                         calc(100% - 2px) 46px,
                         calc(100% - 2px) 46px, 100% 44px,
                         50% 6.29rem,
                         0 5.45rem, 100% 5.45rem,
                         50% 100%,
                         3.5rem 44%
    color: white(.8)
    font-size: 6px
    font-family: Arial
    font-weight: bold
    text-align: right
!

JS 

              
                // @lynnandtonic
// a.singlediv.com
!
999px

Console