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.
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.
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.
The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.
CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.
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.
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).
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.
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.
JavaScript preprocessors can help make authoring JavaScript easier and more convenient.
Babel includes JSX processing.
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.
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.
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.
Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import
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.
If active, Pens will autosave every 30 seconds after being saved once.
If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.
If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.
Visit your global Editor Settings.
mixin bear()
svg(viewbox='0 0 300 550' preserveaspectratio='xMinYMin')
g#layer14(inkscape:groupmode='layer' inkscape:label='Body' transform='translate(-0.17695185,5.8728103)')
path#path4903.bear-body(style='fill-opacity:1;stroke:none;stroke-width:12.90430737;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='M 150,0 C 63.857716,0 10.00001,34.411611 10,130 8.4323514,169.71341 11.334178,200.02544 10,235 8.3321211,278.72231 2.7e-6,317.82631 0,365.88086 -1.37e-6,390.24297 4.1966961,413.45279 11.787109,434.5625 19.377522,455.67221 9.8577985,536.16856 28.710938,550 H 272.67383 c 19.19841,-9.91392 7.94865,-94.32779 15.53906,-115.4375 C 295.80331,413.45279 300,390.24297 300,365.88086 300,317.20713 291.66788,278.72231 290,235 288.66582,200.02544 289.9011,162.43395 290,130 290,34.411612 236.1423,0 150,0 Z' transform='translate(0.17695185,-5.8728103)' inkscape:connector-curvature='0' sodipodi:nodetypes='scassccssacs')
path#path4915.bear-foot(inkscape:connector-curvature='0' style='fill:none;fill-opacity:1;stroke-width:5.85319996;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 31.637353,519.15731 c 2.128588,-6.8582 23.982905,-12.13974 50.232636,-12.13974 26.248761,0 48.102611,5.28116 50.232431,12.13908' sodipodi:nodetypes='csc')
path#path4927.bear-foot(inkscape:connector-curvature='0' d='m 168.64329,519.15731 c 2.12859,-6.8582 23.98291,-12.13974 50.23264,-12.13974 26.24876,0 48.10261,5.28116 50.23243,12.13908' style='fill:none;fill-opacity:1;stroke-width:5.85319996;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' sodipodi:nodetypes='csc')
path#path149.bear-shirt(style='fill-opacity:1;stroke:none;stroke-width:13.78312874;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 8.8722644,249.65144 c -5.1629985,31.643 -8.69531058,63.66489 -8.69531255,101.71235 -1.37e-6,26.42998 3.35133925,50.764 10.94175215,73.6655 2.228082,6.7225 3.81782,19.90497 4.247701,34.27148 H 285.35468 c 0.23749,-14.43766 2.4009,-26.34504 3.03516,-33.42612 7.59042,-22.9015 11.78711,-48.08088 11.78711,-74.51086 0,-38.57756 -3.44487,-70.14589 -8.63477,-101.71235 z' inkscape:connector-curvature='0' sodipodi:nodetypes='csscccscc')
path#path169.bear-body(d='m 300.15155,356.11914 c 0.0101,1.31375 0.0254,2.61975 0.0254,3.94922 0,24.29854 -4.1967,47.44733 -11.78711,68.50195 -0.2147,0.59555 -0.19559,1.39781 -0.59961,1.94141 -5.78277,7.78072 -11.43145,15.89647 -24.13281,16.23047 -13.44563,-3.6e-4 -24.34538,-12.1112 -24.3457,-27.05078 5.4e-4,-10.87395 5.86097,-20.69058 14.87695,-24.91993 v -38.65234 z' style='fill-opacity:1;stroke:none;stroke-width:13.21567822;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' inkscape:connector-curvature='0' sodipodi:nodetypes='cscaccccc')
path#path246.bear-body(style='fill-opacity:1;stroke:none;stroke-width:12.90430737;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='M 54.804688,0 C 30.059929,2.7017562e-4 10.00038,19.355898 10,43.232422 10.356265,71.413496 21.645518,98.108186 10,130 9.219548,149.77128 9.5473055,167.2103 9.9082031,184.05664 30.474266,245.71158 81.412606,286.47461 147.01367,286.47461 c 65.81297,0 120.35609,-41.02437 142.4375,-103.01367 C 289.59724,164.97889 289.94879,146.79556 290,130 278.30005,97.069175 289.62438,70.763724 290,43.232422 289.99962,19.355898 269.94007,2.6910984e-4 245.19531,0 234.95959,0.01262912 225.03691,3.406576 217.07812,9.6171875 197.87609,2.9820709 175.33701,0 150,0 124.66299,0 102.12391,2.982071 82.921875,9.6171875 74.963087,3.4065766 65.040411,0.01262978 54.804688,0 Z' transform='translate(0.17695185,-5.8728103)' inkscape:connector-curvature='0' sodipodi:nodetypes='ccccscccccscc')
g#g5009
path#path4870.bear-body(sodipodi:nodetypes='ccsccccc' inkscape:connector-curvature='0' style='fill-opacity:1;stroke:none;stroke-width:13.21567822;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 0.20235,356.11914 c -0.0101,1.31375 -0.0254,2.61975 -0.0254,3.94922 1.01126,25.71444 3.43454,50.20488 12.38672,70.44336 3.92161,8.86572 11.43145,15.89647 24.13281,16.23047 13.44563,-3.6e-4 24.34538,-12.1112 24.3457,-27.05078 -5.4e-4,-10.87395 -5.86097,-20.69058 -14.87695,-24.91993 v -38.65234 z')
path#path4874.bear-claw(style='fill-opacity:1;stroke:none;stroke-width:6.78819799;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 29.294138,420.39281 c -1.425051,0.0546 -2.474233,0.60858 -2.351563,1.24219 l 4.765625,24.58203 c 1.568539,0.2919 3.223619,0.47899 4.988281,0.52539 0.09701,0 0.19232,-0.007 0.289063,-0.008 l -4.898438,-25.29864 c -0.06136,-0.3168 -0.405236,-0.59034 -0.910156,-0.77929 -0.50498,-0.18901 -1.170282,-0.29097 -1.882812,-0.26368 z' inkscape:connector-curvature='0')
path#path5001.bear-claw(transform='translate(0.17695185,-5.8728103)' d='M 44.148438 421.51758 C 43.609248 421.51558 42.9497 421.65268 42.291016 421.92578 C 40.973663 422.47197 40.182458 423.3547 40.517578 423.90625 L 53.380859 445.06641 C 54.613264 443.75062 55.725459 442.29617 56.6875 440.71875 L 45.271484 421.93359 C 45.103903 421.65783 44.687551 421.51938 44.148438 421.51758 z ' style='fill-opacity:1;stroke:none;stroke-width:6.78819799;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1')
g#g5017(transform='matrix(-1,0,0,1,300.3539,0)')
path#path5011.bear-body(d='m 0.20235,356.11914 c -0.0101,1.31375 -0.0254,2.61975 -0.0254,3.94922 1.01126,25.71444 3.43454,50.20488 12.38672,70.44336 3.92161,8.86572 11.43145,15.89647 24.13281,16.23047 13.44563,-3.6e-4 24.34538,-12.1112 24.3457,-27.05078 -5.4e-4,-10.87395 -5.86097,-20.69058 -14.87695,-24.91993 v -38.65234 z' style='fill-opacity:1;stroke:none;stroke-width:13.21567822;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' inkscape:connector-curvature='0' sodipodi:nodetypes='ccsccccc')
path#path5013.bear-claw(inkscape:connector-curvature='0' d='m 29.294138,420.39281 c -1.425051,0.0546 -2.474233,0.60858 -2.351563,1.24219 l 4.765625,24.58203 c 1.568539,0.2919 3.223619,0.47899 4.988281,0.52539 0.09701,0 0.19232,-0.007 0.289063,-0.008 l -4.898438,-25.29864 c -0.06136,-0.3168 -0.405236,-0.59034 -0.910156,-0.77929 -0.50498,-0.18901 -1.170282,-0.29097 -1.882812,-0.26368 z' style='fill-opacity:1;stroke:none;stroke-width:6.78819799;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1')
path#path5015.bear-claw(style='fill-opacity:1;stroke:none;stroke-width:6.78819799;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 44.148438,421.51758 c -0.53919,-0.002 -1.198738,0.1351 -1.857422,0.4082 -1.317353,0.54619 -2.108558,1.42892 -1.773438,1.98047 l 12.863281,21.16016 c 1.232405,-1.31579 2.3446,-2.77024 3.306641,-4.34766 L 45.271484,421.93359 c -0.167581,-0.27576 -0.583933,-0.41421 -1.123046,-0.41601 z' transform='translate(0.17695185,-5.8728103)' inkscape:connector-curvature='0')
g#layer13(inkscape:groupmode='layer' inkscape:label='Shirt' style='display:inline' transform='translate(-0.17695185,5.8728103)')
g#layer11(style='fill:none;stroke:#ffffff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' transform='translate(82.176901,341.4761)')
path#path5056(d='m 80,6 h -9 v 14 h 9 M 114,6 h -9 v 14 h 9 m -3,-7 h -6 m -28,0 h -6 m 51,7 V 6 l 11,14 V 6 M 22,16.7 33,24 44,16.7 V 9.3 L 33,2 22,9.3 Z m 22,0 L 33,9.3 22,16.7 M 22,9.3 33,16.6 44,9.3 M 33,2 v 7.3 m 0,7.4 V 24 M 88,14 h 6 c 2.2,0 4,-1.8 4,-4 C 98,7.8 96.2,6 94,6 H 88 V 20 M 15,8 C 13.7,6.7 12,6 10,6 6,6 3,9 3,13 c 0,4 3,7 7,7 2,0 3.7,-0.8 5,-2 m 49,-5 c 0,4 -3,7 -7,7 H 52 V 6 h 5 c 4,0 7,3 7,7 z' style='fill:none;stroke:#ffffff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' inkscape:connector-curvature='0')
g#layer15(inkscape:groupmode='layer' inkscape:label='Arms' transform='translate(-0.17695185,5.8728103)')
g#layer12(inkscape:groupmode='layer' inkscape:label='Head' transform='translate(-0.17695185,5.8728103)' style='display:inline')
path#path188(inkscape:connector-curvature='0' d='M 54.982147,6.9706839 A 31.493507,30.388473 0 0 0 23.48864,37.360802 31.493507,30.388473 0 0 0 49.424618,67.243614 c 0.358852,-0.529013 0.654382,-1.126985 1.02222,-1.646205 2.208922,-3.117994 4.580632,-6.060048 7.10481,-8.829647 2.524177,-2.769599 5.201251,-5.367946 8.025568,-7.797281 2.824318,-2.429336 5.793862,-4.690537 8.903206,-6.787744 3.109344,-2.097205 6.358466,-4.030363 9.737723,-5.803571 0.701215,-0.367951 1.471504,-0.650254 2.183948,-1.004464 A 31.493507,30.388473 0 0 0 54.982147,6.9706839 Z' style='fill:#e9c6af;fill-opacity:1;stroke:none;stroke-width:7.79220772;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1')
path#path194(inkscape:connector-curvature='0' style='fill:#e9c6af;fill-opacity:1;stroke:none;stroke-width:7.79220772;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 245.37176,6.9706839 a 31.493507,30.388473 0 0 1 31.49351,30.3901181 31.493507,30.388473 0 0 1 -25.93598,29.882812 c -0.35885,-0.529013 -0.65438,-1.126985 -1.02222,-1.646205 -2.20892,-3.117994 -4.58063,-6.060048 -7.10481,-8.829647 -2.52418,-2.769599 -5.20125,-5.367946 -8.02557,-7.797281 -2.82432,-2.429336 -5.79386,-4.690537 -8.90321,-6.787744 -3.10934,-2.097205 -6.35846,-4.030363 -9.73772,-5.803571 -0.70121,-0.367951 -1.4715,-0.650254 -2.18395,-1.004464 A 31.493507,30.388473 0 0 1 245.37176,6.9706839 Z')
g#g244(transform='translate(-323.26452,-28.403996)')
path#path182(inkscape:connector-curvature='0' style='fill:#e9c6af;fill-opacity:1;stroke:none;stroke-width:6;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 560.45446,240.47004 c 4e-5,27.97288 -39.53846,54.54549 -88.31169,54.54549 -48.77322,0 -85.71431,-26.57261 -85.71428,-54.54549 0,-27.97287 36.94109,-46.75325 85.71428,-46.75325 48.77321,0 88.31169,18.78038 88.31169,46.75325 z')
path#path184(inkscape:connector-curvature='0' style='fill:#000000;fill-opacity:1;stroke:none;stroke-width:6;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' d='m 517.27264,203.45706 c 0,10.75878 -26.75291,34.41558 -42.53247,34.41558 -15.77957,0 -45.12987,-23.6568 -45.12987,-34.41558 0,-10.7588 29.3503,-17.53247 45.12987,-17.53247 15.77956,0 42.53247,6.77367 42.53247,17.53247 z')
ellipse#ellipse198(style='fill:#000000;fill-opacity:1;stroke:none;stroke-width:4.05340338;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1' cx='416.07867' cy='146.34923' rx='12.039111' ry='12.57025')
ellipse#ellipse200(ry='12.57025' rx='12.039111' cy='146.34923' cx='521.36218' style='fill:#000000;fill-opacity:1;stroke:none;stroke-width:4.05340338;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1')
- const randomInRange = (max, min) => Math.floor(Math.random() * (max - min + 1)) + min
- const bears = 10
- const colorMap = new Array(bears).fill().reduce((a) => { return [...a,{lightness: randomInRange(20, 70), hue: randomInRange(0, 360)}]}, [])
form.bears(style=`--bear-count: ${bears}`)
- let b = 0
while b < bears
- const { lightness, hue } = colorMap[b]
- const { lightness: nextLightness, hue: nextHue } = colorMap[b + 1] ? colorMap[b+1] : colorMap[b]
- if (b !== (bears - 1))
input(id=`bear--${b}`, type='checkbox')
label.bear(for=`bear--${b}`, style=`--lightness: ${lightness}; --shirt-hue: ${hue}; --bear-index: ${b}; ${b === 0 ? 'display: block;' : ''}`)
span.bear__dummy-container(style=`--lightness: ${nextLightness}; --shirt-hue: ${nextHue};`)
.bear__dummy
+bear()
span.bear__container
span.bear__half.bear__half--top
+bear()
span.bear__half.bear__half--bottom
+bear()
- b++
input(type='reset', id='reset')
label(for='reset', title='Reset bears')
svg(viewbox='0 0 24 24')
path(d='M17.65,6.35C16.2,4.9 14.21,4 12,4A8,8 0 0,0 4,12A8,8 0 0,0 12,20C15.73,20 18.84,17.45 19.73,14H17.65C16.83,16.33 14.61,18 12,18A6,6 0 0,1 6,12A6,6 0 0,1 12,6C13.66,6 15.14,6.69 16.22,7.78L13,11H20V4L17.65,6.35Z')
*
-webkit-tap-highlight-color transparent
box-sizing border-box
outline-color transparent
body
align-items center
background #fafafa
display flex
justify-content center
min-height 100vh
:root
--speed 0.25
--scale-step 0.05
--base-width 100
--base-height calc(var(--base-width) * 1.83333333333)
--pop-height 60
--slide-distance 60
--base-slide calc(var(--base-width) * 1)
@media(min-width 768px)
--base-width 300
.bears
height calc(var(--base-height) * 1px)
margin 0
position relative
width calc(var(--base-width) * 1px)
&:after
background hsl(0, 0%, 75%)
content ""
height 4px
left 50%
position absolute
top 100%
transform translate(-50%, 0)
width 200%
.bear
--bear-color 'hsl(25, 80%, %s)' % (calc(var(--lightness) * 1%))
--claw-color 'hsl(25, 80%, %s)' % (calc((var(--lightness) - 20) * 1%))
--shirt-color 'hsl(%s, 50%, 50%)' % (var(--shirt-hue))
height 100%
position absolute
width 100%
/*
* Purely for styling the SVG elements
*/
.bear-body
fill var(--bear-color)
.bear-shirt
fill var(--shirt-color)
.bear-claw
fill var(--claw-color)
.bear-foot
stroke var(--claw-color)
&__half
position absolute
height 50%
left 0
overflow hidden
width 100%
// Little trick here is absolute positioned SVG
// With overflow hidden on the halves
svg
height 200%
position absolute
width 100%
&--top
top 0
svg
top 0
&--bottom
bottom 0
svg
bottom 0
&__container
&__dummy-container
height 100%
left 0
position absolute
top 0
width 100%
&__container
transform scale(calc(1 - ((var(--bear-index)) * var(--scale-step))))
transform-origin bottom
&__dummy
--bear-color 'hsl(25, 80%, %s)' % (calc(var(--lightness) * 1%))
--claw-color 'hsl(25, 80%, %s)' % (calc((var(--lightness) - 20) * 1%))
--shirt-color 'hsl(%s, 50%, 50%)' % (var(--shirt-hue))
height 100%
left 0
position absolute
top 0
transform scale(calc(1 - ((var(--bear-index) + 1) * var(--scale-step))))
transform-origin bottom center
width 100%
[type='checkbox']
[type='reset']
display none
label
cursor pointer
display none
[for='reset']
display block
height 44px
position fixed
right 1rem
top 1rem
transition transform calc(var(--speed) * 1s) ease
width 44px
&:hover
transform translate(0, -5%) scale(1.1)
svg path
fill #111
svg
height 44px
width 44px
path
transition fill calc(var(--speed) * 1s) ease
fill #aaaaaa
/**
* A lot needs to happen when we check the box
* 1. Disable clicking til animation finished
* 2. Move the parent bear
* 3. Reveal the baby bear
* 4. Move the baby bear
* 5. Show the real baby bear
* 6. Show the new input
* 7. Hide the dummy baby bear
* 8. Fade out the parent bear
*/
input:checked + .bear + input + .bear
input:checked + .bear + .bear
display block
animation appear 0s calc(var(--speed) * 5s) both
input:checked + .bear
input:checked + .bear + input:checked + .bear
animation slideLeft calc(var(--speed) * 1s) forwards, slideOut calc(var(--speed) * 1s) calc(var(--speed) * 6s) forwards
pointer-events none
.bear__half--top
animation open calc(var(--speed) * 2s) calc(var(--speed) * 1s) forwards
.bear__dummy-container
animation move calc(var(--speed) * 2s) calc(var(--speed) * 3s) forwards, appear 0s calc(var(--speed) * 5s) reverse forwards
@keyframes slideLeft
to
transform translate(calc((var(--base-slide) * -1px) + var(--slide-distance) * -1%), 0)
@keyframes open
0%
transform translate(0, 0)
{100 / 3%}
transform translate(0, -100%)
{100/ 3 * 2%}
transform translate(-100%, -100%)
100%
transform translate(-100%, 100%)
@keyframes move
0%
transform translate(0, 0) translate(0,0)
{100 / 3%}
transform translate(0, calc(var(--pop-height) * -1%)) translate(0, 0)
{100/ 3 * 2%}
transform translate(0, calc(var(--pop-height) * -1%)) translate(calc((var(--base-slide) * 1px) + var(--slide-distance) * 1%), 0)
100%
transform translate(0, calc(var(--pop-height) * -1%)) translate(calc((var(--base-slide) * 1px) + var(--slide-distance) * 1%), calc(var(--pop-height) * 1%))
@keyframes slideOut
from
transform translate(calc((var(--base-slide) * -1px) + var(--slide-distance) * -1%), 0)
to
opacity 0
transform translate(calc((var(--base-slide) * -1px) + var(--slide-distance) * -2%), 0)
@keyframes appear
from
transform scale(0)
// 404
Also see: Tab Triggers