Pen Settings

HTML

About HTML Preprocessors

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.

Learn more · Versions

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.

!
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.

Learn more · Versions

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

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

Powered by Algolia
About External Resources

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.

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

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

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

Learn more · Versions

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

Powered by Algolia
About External Resources

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.

Learn more

+ add another resource

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.

Powered by Algolia
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.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML 

              
                .container
  .intro
    p a nearly pure CSS watch implementation that just requires JavaScript to initiate hand positions
  .watch-case
    .watch
      .watch__face
        .watch-seconds
          .watch-seconds__hand
        .watch-minutes
          .watch-minutes__hand
        .watch-hours
          .watch-hours__hand
      .watch__strap
      .watch__dial
!

CSS 

              
                *
  box-sizing border-box

body
  background-color #e74c3c
  color            #fafafa
  text-align       center
  
.watch-case
  position relative
  height 300px
  width  300px
  margin 0 auto

$ns      = watch
$seconds = watch-seconds
$minutes = watch-minutes
$hours   = watch-hours
$handMod = hand

$clockSize = 200px

getPosition(angle)
  $layoutRadius = ($clockSize / 2) - 15
  xPos = $layoutRadius * cos(angle * (PI / 180))
  yPos = $layoutRadius * sin(angle * (PI / 180))
  (xPos yPos)

genShadows()
  $shadows = ()
  for $indicator in (1..12)
    $angle       = (360 / 12) * ($indicator - 1)
    $xy          = getPosition($angle)
    $dots        = $numberOfDots
    $scale       = 0
    if $indicator == 1 || $indicator == 4 || $indicator == 7 || $indicator == 10
      $scale = 2px
    $shadowProps = $xy 0 $scale grey
    push($shadows, join(' ', $shadowProps))
  (unquote(join(',', $shadows)))

.{$ns}
  height   $clockSize
  width    $clockSize
  position absolute
  top      50%
  left     50%
  margin-left -($clockSize / 2)
  margin-top  -($clockSize / 2)

  &__face
    &:before
      content ''
      height 4px
      width 4px
      display block
      position absolute
      top 50%
      left 50%
      border-radius 4px
      margin-left -2px
      margin-top -2px
      background-color blue
      box-shadow genShadows()

    height 100%
    width  100%
    border-radius $clockSize
    background-color #fafafa
    border 8px solid #111

  &__dial
    position absolute
    left 100%
    background-color grey
    height 40px
    width 20px
    top 50%
    margin-top -20px
    margin-left -10px
    z-index -1

  &__strap
    position absolute
    width 50%
    height 150%
    background-color #000
    top 50%
    left 50%
    margin-left -25%
    margin-top -75%
    z-index -1

  for $second in (0..59)
    &[start-seconds=\"{$second}\"]
      .{$seconds}
        transform rotate(((360 / 60) * $second)deg)
      if $second > 0
        $offset = 60 - $second
        .{$minutes}__{$handMod}
          animation-delay ($offset * 1s)
    $minute = $second
    if $minute > 0
      $minute = $minute + 1
    &[start-minutes=\"{$second}\"]
      .{$minutes}
        transform rotate(((360 / 60) * $minute)deg)
      for $hour in (0..12)
        &[start-hours=\"{$hour}\"]
          $hourOffset = (360 / 12) * $hour
          $minuteOffset = (360 / 12 / 60) * $minute
          .{$hours}
            transform rotate(($hourOffset + $minuteOffset) * 1deg)

.{$seconds}
.{$minutes}
.{$hours}
  display block
  position absolute
  top 0
  left 0
  height  100%
  width   100%

  &__{$handMod}
    position absolute
    display block
    height  (($clockSize / 2) - 20)
    width   8px
    left 50%
    top 50%
    margin-left -4px
    transform-origin bottom center
    margin-top -(($clockSize / 2) - 20)
    background-color #000
    border-radius 5px 5px 5px 5px

    &:before
      background-color #000
      content ''
      position absolute
      bottom -8px
      left 50%
      height 16px
      width  16px
      margin-left -8px
      border-radius 100%




.{$seconds}
  z-index 3

  &__{$handMod}
    background-color red
    width 2px
    margin-left -1px
    &:before
      background-color red
      content ''
      position absolute
      bottom -5px
      left 50%
      height 10px
      width  10px
      margin-left -5px
      border-radius 100%
    /* A full rotation will be 1 minute */
    animation rotate (1 * 60s) linear infinite

.{$minutes}
  z-index 2

  &__{$handMod}
    /* A full rotation will be 60 minutes */
    animation rotate (60 * 60s) steps(60) infinite

.{$hours}
  z-index 1
  &__{$handMod}
    height (($clockSize / 2) - 40)
    margin-top -(($clockSize / 2) - 40)
    /* A full rotation is 720 minutes */
    animation rotate (720 * 60s) infinite linear

@keyframes rotate
  from
    transform rotate(0deg)
  to
    transform rotate(360deg)

p
  background-color #fafafa
  color grey
  display inline-block
  padding 10px
  border-radius 10px
  border 4px solid grey
!

JS 

              
                ;(function(){
  const watch = document.querySelector('.watch');
  const d = new Date();
  watch.setAttribute('start-seconds', d.getSeconds());
  watch.setAttribute('start-minutes', d.getMinutes());
  watch.setAttribute('start-hours'  , (d.getHours() > 11) ? d.getHours() - 12 : d.getHours());
})();
!
999px

Console