cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation


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.

              <h1 class="title"><span class="highlight" style="background: black"><del>MathSpace</del> Actually, just use CSS.</span></h1>

<p class="title"><span class="highlight">DEFAULT: This is how highlighted text usally wraps. It gets tight on the left and right edges.</span></p>

<p class="title"><span class="highlight highlight--wrapping">Good News! We can use <del>CSS and Unicode</del> <del>white-space: pre-wrap</del> <ins>box-shadow</ins> to fix it...</span></p>

<p>Hattip: Harry Roberts for being a CSS Wizard <a href="http://jsfiddle.net/csswizardry/KUv8r/">http://jsfiddle.net/csswizardry/KUv8r/</a></p>
<p>Hattip: Fabien-d is also a CSS wizard and shows you can just use box-shadow <a href="https://codepen.io/fabien-d/pen/rHtal">https://codepen.io/fabien-d/pen/rHtal</a></p>

<p class="title title--js"><span class="highlight highlight--wrapping">Then get all "10x" and <del>automate unicode with a tiny jQuery I call "MathSpace"</del> <del>Just use pre-wrap</del> <ins>use box-shadow</ins></span></p>

  <p>FYI: Bit of a problem in <del>drunk</del> Firefox. <strong>BOX-SHADOW trick works in Firefox. Hooray</strong></p>

<p class="title bdb"><span class="highlight">This is a box-decoration-break paragraph</span></p>

<p>Webkit only. Firefox doesn't support this yet: <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=613659">https://bugzilla.mozilla.org/show_bug.cgi?id=613659</a></p>
              $pad-wide: 20px;
$color-red: #ee4035;
$color-white: #fff;
$title-pad: 0.25em;
$title-lineheight: $title-pad + 1;

.title {
  font: 36px/1.25 Ubuntu, sans-serif;
  line-height: $title-pad + 1em;
  text-transform: uppercase;
  margin-bottom: 1em;
  .highlight {
    display: inline;
    background: $color-red;
    color: $color-white; 
    padding: $title-pad;

  .highlight--wrapping {
    position: relative;
    left: $title-pad;
    padding-left: 0;
    box-shadow: $title-pad 0 0 $color-red,  
                $title-pad*-1 0 0 $color-red;



body {
  background: #ccc;
  text-align: left;
  padding: 3%;
  font: 100%/1.5 Ubuntu, sans-serif;

h1.title {
  font-size: 3em;

p {
  margin-bottom: 1em;

del { opacity: 0.3; }

a { color: $color-red; }

.bdb {
  .highlight {
    background-color: green;
    box-decoration-break: clone;


$.fn.mathSpace = function() {
  return $(this).each(function(){
      var text = $(this).text();
        text.split(' ').join('\u205f')  /* (U+205F) 'MEDIUM MATHEMATICAL SPACE' \*\/

Loading ..................