Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

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.

+ 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.

Behavior

Save Automatically?

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

              
                <nav class="menu">
  <input id="menu__button" type="checkbox" checked />
  <a class="menu__item" href="#">Home</a>
  <a class="menu__item" href="#">About</a>
  <a class="menu__item" href="#">Contact</a>
  <a class="menu__item" href="#">Help</a>
  <label class="menu__close" for="menu__button"></label>
</nav>
<h1>Triangular mobile navigation</h1>
              
            
!

CSS

              
                @import url("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.min.css")
@import url(https://fonts.googleapis.com/css?family=Lato:300,400);

/*------------------------------------*\
  VARIABLES
\*------------------------------------*/

$darkGray = #2e2e2e

$itemColors = #67E89B, #5FD992, #58C988, #52BA7D, #459C69

$baseSize = 4.8rem
$itemCount = 4


/*------------------------------------*\
  BASE STYLES
\*------------------------------------*/

*,
*::before,
*::after
  box-sizing border-box
  outline none

body
  position relative
  display flex
  justify-content center
  background-color $darkGray
  font-family Lato, Arial, sans-serif
  
h1
  font-size 3rem
  font-weight 300
  margin 5rem 0
  color white

a
  text-decoration none
  color white

input[type=checkbox]
    position absolute
    top -9999px
    left -9999px


/*------------------------------------*\
  MENU
\*------------------------------------*/
  
.menu
  position absolute
  left 0
  top 0
  display flex
  flex-direction column
  align-items flex-start


/*------------------------------------*\
  MENU ITEM
\*------------------------------------*/

.menu__item
  position relative
  display flex
  justify-content center
  font-size 1.4rem
  font-weight 300
  padding 0.5rem
  transform translateX(calc(-100% -\ 2.4rem))
  transition background-color 0.2s
  for index in 1..$itemCount
    &:nth-child({index + 1})
      $tmp = $itemCount - index
      $dec = index - 1
      $currentColor = $itemColors[$dec]
      width ($baseSize+($tmp*2.4rem))
      background-color $currentColor

      &::after
        position absolute
        content ""
        width 0
        height 0
        left 100%
        top 0
        border 1.2rem solid $currentColor
        border-right 1.2rem solid transparent
        border-bottom 1.2rem solid transparent
        transition border 0.2s

      &:hover
        background-color darken($currentColor, 20%)

      &:hover::after
        border 1.2rem solid darken($currentColor, 20%)
        border-right 1.2rem solid transparent
        border-bottom 1.2rem solid transparent


/*------------------------------------*\
  MENU CLOSE
\*------------------------------------*/

.menu__close
  position relative
  font-family FontAwesome
  font-size 1.2rem
  color white
  width 2*($baseSize - 2.4rem)
  height 2*($baseSize - 2.4rem)
  cursor pointer
  transform translateX(-100%)

  &::before
    position absolute
    content ""
    top 0.9rem
    left 0.9rem
    z-index 1

  &::after
    position absolute
    content ""
    width 0
    height 0
    border ($baseSize - 2.4rem) solid $itemColors[-1]
    border-right ($baseSize - 2.4rem) solid transparent
    border-bottom ($baseSize - 2.4rem) solid transparent
    transition border 0.2s

  &:hover::after
    border ($baseSize - 2.4rem) solid darken($itemColors[-1], 20%)
    border-right ($baseSize - 2.4rem) solid transparent
    border-bottom ($baseSize - 2.4rem) solid transparent

input[type=checkbox]:checked ~ .menu__item
  for index in 1..$itemCount
    &:nth-child({index + 1})
      transition transform 0.2s ($itemCount - index)*0.1s, background-color 0.2s
      transform translateX(calc(-100% -\ 2.4rem)) !important

input[type=checkbox]:checked ~ .menu__close
  transition transform 0.2s ($itemCount - 1)*0.1s, background-color 0.2s
  transform translateY($itemCount*(-2.4rem)) !important

  &::before
    content ""

input[type=checkbox]:not(:checked) ~ .menu__item
  for index in 1..$itemCount
    &:nth-child({index + 1})
      transition transform 0.2s (index)*0.1s, background-color 0.2s
      transform translateX(0) !important

input[type=checkbox]:not(:checked) ~ .menu__close
  transition transform 0.2s 0.1s, background-color 0.2s
  transform translateY(0) !important
              
            
!

JS

              
                
              
            
!
999px

Console