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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.

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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

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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

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).

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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 

              
                <header>
  <h1>Techniques to Break Words</h1>
  <p>
    Used in the post <cite><a href="https://adrianroselli.com/2024/02/techniques-to-break-words.html" target="_top">Text Wrap Techniques</a></cite>. Check the <a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fcdpn.io%2Fpen%2Fdebug%2FeYoOdrX" target="_top">validation results</a> from W3C's Nu HTML Checker.
  </p>
</header>
<nav>
  <fieldset id="C">
    <legend>CSS properties</legend>
    <button type="button" id="C1" onclick="wrappage(this.id);" aria-pressed="true">none</button>
    <button type="button" id="C2" onclick="wrappage(this.id);" aria-pressed="false"><code>word-break</code></button>
    <button type="button" id="C3" onclick="wrappage(this.id);" aria-pressed="false"><code>overflow-wrap</code></button>
    <button type="button" id="C4" onclick="wrappage(this.id);" aria-pressed="false"><code>hyphens</code></button>
    <!--   <button type="button" id="C5" onclick="wrappage(this.id);" aria-pressed="false"><code>hyphens:manual</code></button> -->
  </fieldset>
  <fieldset id="T">
    <legend><code>table-layout</code></legend>
    <button type="button" id="T1" onclick="tablesLayout(this.id);" aria-pressed="true">nah</button>
    <button type="button" id="T2" onclick="tablesLayout(this.id);" aria-pressed="false"><code>fixed</code></button>
  </fieldset>
  <fieldset id="H">
    <legend id="HL"><code>hyphenate-character</code></legend>
    <input type="text" id="H1" value="🤔" aria-labelledby="HL">
    <button type="button" onclick="setHyphen('H1');">Do it</button>
  </fieldset>
  <fieldset id="W">
    <legend id="WL"><code>max-width</code></legend>
    <input type="text" id="W1" value="6em" aria-labelledby="WL">
    <button type="button" onclick="setMaxWidth('W1');">Do it</button>
  </fieldset>
</nav>

<main>
  <!-- No wrap -->

  <div>
    <h2>CSS</h2>
    <div>
      <p>
        supercalifragilisticexpialidocious
      </p>
      <p lang="de">
        Donaudampfschifffahrtsgesellschaftskapitän
      </p>
      <p lang="he" dir="rtl">
        וכשלאנציקלופדיותינו
      </p>
      <p lang="hi">
        लौहपथगामिनीसूचकदर्शकहरितताम्रलौहपट्टिकाएँ
      </p>
      <p lang="ja">
        愛知県海部郡飛島村大字飛島新田字竹之郷ヨタレ南ノ割
      </p>
      <p lang="ar" dir="rtl">
        أَفَيَسْتَكْتِبونَكُمانيهِما
      </p>
      <p>
        https://en.wikipedia.org/wiki/The_King_in_Yellow
      </p>
      <p>
        JR-Bob.Dobbs@CoSG.example.com
      </p>
      <table>
        <caption>Words</caption>
        <tr>
          <th>Language</th>
          <th>Word</th>
        </tr>
        <tr>
          <th>English</th>
          <td>
            supercalifragilisticexpialidocious
          </td>
        </tr>
        <tr>
          <th>German</th>
          <td lang="de">
            Donaudampfschifffahrtsgesellschaftskapitän
          </td>
        </tr>
        <tr>
          <th>Hebrew</th>
          <td lang="he" dir="rtl">
            וכשלאנציקלופדיותינו
          </td>
        </tr>
        <tr>
          <th>Hindi</th>
          <td lang="hi">
            लौहपथगामिनीसूचकदर्शकहरितताम्रलौहपट्टिकाएँ
          </td>
        </tr>
        <tr>
          <th>Japanese</th>
          <td lang="ja">
            愛知県海部郡飛島村大字飛島新田字竹之郷ヨタレ南ノ割
          </td>
        </tr>
        <tr>
          <th>Arabic</th>
          <td lang="ar" dir="rtl">
            أَفَيَسْتَكْتِبونَكُمانيهِما
          </td>
        </tr>
        <tr>
          <th>URL</th>
          <td>
            https://en.wikipedia.org/wiki/The_King_in_Yellow
          </td>
        </tr>
        <tr>
          <th>Email</th>
          <td>
            JR-Bob.Dobbs@CoSG.example.com
          </td>
        </tr>
        <tr>
          <th>Idiom</th>
          <td>
            Chicken/egg
          </td>
        </tr>
        <tr>
          <th>Idiom 2</th>
          <td>
            Chicken / egg
          </td>
        </tr>
      </table>
    </div>
  </div>

  <!-- wbr -->

  <div>
    <h2><code>&lt;wbr&gt;</code></h2>
    <div>
      <p>
        super<wbr>cali<wbr>frag<wbr>il<wbr>is<wbr>tic<wbr>ex<wbr>pial<wbr>id<wbr>oc<wbr>ious
      </p>
      <p lang="de">
        Donau<wbr>dampf<wbr>schiff<wbr>fahrts<wbr>gesell<wbr>schafts<wbr>kapitän
      </p>
      <p lang="he" dir="rtl">
        וכשלאנ<wbr>ציקלופ<wbr>דיותינו
      </p>
      <p lang="hi">
        लौहपथगा<wbr>मिनीसू<wbr>चकदर्शक<wbr>हरितताम्रल<wbr>ौहपट्टिकाएँ
      </p>
      <p lang="ja">
        愛知県海部<wbr>郡飛島村大<wbr>字飛島新田<wbr>字竹之郷ヨタ<wbr>レ南ノ割
      </p>
      <p lang="ar" dir="rtl">
        أَفَيَسْتَكْتِبو<wbr>نَكُمانيهِما
      </p>
      <p>
        https:<wbr>//en<wbr>.wikipedia<wbr>.org<wbr>/wiki<wbr>/The<wbr>_King<wbr>_in<wbr>_Yellow
      </p>
      <p>
        JR<wbr>-Bob<wbr>.Dobbs<wbr>@CoSG<wbr>.example<wbr>.com
      </p>
      <table>
        <caption>Words</caption>
        <tr>
          <th>Language</th>
          <th>Word</th>
        </tr>
        <tr>
          <th>English</th>
          <td>
            super<wbr>cali<wbr>frag<wbr>il<wbr>is<wbr>tic<wbr>ex<wbr>pial<wbr>id<wbr>oc<wbr>ious
          </td>
        </tr>
        <tr>
          <th>German</th>
          <td lang="de">
            Donau<wbr>dampf<wbr>schiff<wbr>fahrts<wbr>gesell<wbr>schafts<wbr>kapitän
          </td>
        </tr>
        <tr>
          <th>Hebrew</th>
          <td lang="he" dir="rtl">
            וכשלאנ<wbr>ציקלופ<wbr>
          </td>
        </tr>
        <tr>
          <th>Hindi</th>
          <td lang="hi">
            लौहपथगा<wbr>मिनीसू<wbr>चकदर्शक<wbr>हरितताम्रल<wbr>ौहपट्टिकाएँ
          </td>
        </tr>
        <tr>
          <th>Japanese</th>
          <td lang="ja">
            愛知県海部<wbr>郡飛島村大<wbr>字飛島新田<wbr>字竹之郷ヨタ<wbr>レ南ノ割
          </td>
        </tr>
        <tr>
          <th>Arabic</th>
          <td lang="ar" dir="rtl">
            أَأَفَيَسْتَكْتِبو<wbr>نَكُمانيهِما
          </td>
        </tr>
        <tr>
          <th>URL</th>
          <td>
            https:<wbr>//en<wbr>.wikipedia<wbr>.org<wbr>/wiki<wbr>/The<wbr>_King<wbr>_in<wbr>_Yellow
          </td>
        </tr>
        <tr>
          <th>Email</th>
          <td>
            JR<wbr>-Bob<wbr>.Dobbs<wbr>@CoSG<wbr>.example<wbr>.com
          </td>
        </tr>
        <tr>
          <th>Idiom</th>
          <td>
            Chicken/egg
          </td>
        </tr>
        <tr>
          <th>Idiom 2</th>
          <td>
            Chicken / egg
          </td>
        </tr>
      </table>
    </div>
  </div>

  <!-- &shy; -->

  <div>
    <h2><code>&amp;shy;</code></h2>
    <div>
      <p>
        super&shy;cali&shy;frag&shy;il&shy;is&shy;tic&shy;ex&shy;pial&shy;id&shy;oc&shy;ious
      </p>
      <p lang="de">
        Donau&shy;dampf&shy;schiff&shy;fahrts&shy;gesell&shy;schafts&shy;kapitän
      </p>
      <p lang="he" dir="rtl">
        וכשלאנ&shy;ציקלופ&shy;דיותינו
      </p>
      <p lang="hi">
        लौहपथगा&shy;मिनीसू&shy;चकदर्शक&shy;हरितताम्रल&shy;ौहपट्टिकाएँ
      </p>
      <p lang="ja">
        愛知県海部&shy;郡飛島村大&shy;字飛島新田&shy;字竹之郷ヨタ&shy;レ南ノ割
      </p>
      <p lang="ar" dir="rtl">
        أَفَيَسْتَكْتِبو&shy;نَكُمانيهِما
      </p>
      <p>
        https:&shy;//en&shy;.wikipedia&shy;.org&shy;/wiki&shy;/The&shy;_King&shy;_in&shy;_Yellow
      </p>
      <p>
        JR&shy;-Bob&shy;.Dobbs&shy;@CoSG&shy;.example&shy;.com
      </p>
      <table>
        <caption>Words</caption>
        <tr>
          <th>Language</th>
          <th>Word</th>
        </tr>
        <tr>
          <th>English</th>
          <td>
            super&shy;cali&shy;frag&shy;il&shy;is&shy;tic&shy;ex&shy;pial&shy;id&shy;oc&shy;ious
          </td>
        </tr>
        <tr>
          <th>German</th>
          <td lang="de">
            Donau&shy;dampf&shy;schiff&shy;fahrts&shy;gesell&shy;schafts&shy;kapitän
          </td>
        </tr>
        <tr>
          <th>Hebrew</th>
          <td lang="he" dir="rtl">
            וכשלאנ&shy;ציקלופ&shy;דיותינו
          </td>
        </tr>
        <tr>
          <th>Hindi</th>
          <td lang="hi">
            लौहपथगा&shy;मिनीसू&shy;चकदर्शक&shy;हरितताम्रल&shy;ौहपट्टिकाएँ
          </td>
        </tr>
        <tr>
          <th>Japanese</th>
          <td lang="ja">
            愛知県海部&shy;郡飛島村大&shy;字飛島新田&shy;字竹之郷ヨタ&shy;レ南ノ割
          </td>
        </tr>
        <tr>
          <th>Arabic</th>
          <td lang="ar" dir="rtl">
            أَفَيَسْتَكْتِبو&shy;نَكُمانيهِما
          </td>
        </tr>
        <tr>
          <th>URL</th>
          <td>
            https:&shy;//en&shy;.wikipedia&shy;.org&shy;/wiki&shy;/The&shy;_King&shy;_in&shy;_Yellow
          </td>
        </tr>
        <tr>
          <th>Email</th>
          <td>
            JR&shy;-Bob&shy;.Dobbs&shy;@CoSG&shy;.example&shy;.com
          </td>
        </tr>
        <tr>
          <th>Idiom</th>
          <td>
            Chicken/egg
          </td>
        </tr>
        <tr>
          <th>Idiom 2</th>
          <td>
            Chicken / egg
          </td>
        </tr>
      </table>
    </div>
  </div>

  <!-- &shy; with hyphens manual -->

  <div>
    <h2><code>hyphens:manual</code></h2>
    <div class="hyphens manual">
      <p>
        super&shy;cali&shy;frag&shy;il&shy;is&shy;tic&shy;ex&shy;pial&shy;id&shy;oc&shy;ious
      </p>
      <p lang="de">
        Donau&shy;dampf&shy;schiff&shy;fahrts&shy;gesell&shy;schafts&shy;kapitän
      </p>
      <p lang="he" dir="rtl">
        וכשלאנציקלופדיותינו
      </p>
      <p lang="hi">
        लौहपथगामिनीसूचकदर्शकहरितताम्रलौहपट्टिकाएँ
      </p>
      <p lang="ja">
        愛知県海部郡飛島村大字飛島新田字竹之郷ヨタレ南ノ割
      </p>
      <p lang="ar" dir="rtl">
        أَفَيَسْتَكْتِبونَكُمانيهِما
      </p>
      <p>
        https:&shy;//en&shy;.wikipedia&shy;.org&shy;/wiki&shy;/The&shy;_King&shy;_in&shy;_Yellow
      </p>
      <p>
        JR&shy;-Bob&shy;.Dobbs&shy;@CoSG&shy;.example&shy;.com
      </p>
      <table>
        <caption>Words</caption>
        <tr>
          <th>Language</th>
          <th>Word</th>
        </tr>
        <tr>
          <th>English</th>
          <td>
            super&shy;cali&shy;frag&shy;il&shy;is&shy;tic&shy;ex&shy;pial&shy;id&shy;oc&shy;ious
          </td>
        </tr>
        <tr>
          <th>German</th>
          <td lang="de">
            Donau&shy;dampf&shy;schiff&shy;fahrts&shy;gesell&shy;schafts&shy;kapitän
          </td>
        </tr>
        <tr>
          <th>Hebrew</th>
          <td lang="he" dir="rtl">
            וכשלאנציקלופדיותינו
          </td>
        </tr>
        <tr>
          <th>Hindi</th>
          <td lang="hi">
            लौहपथगामिनीसूचकदर्शकहरितताम्रलौहपट्टिकाएँ
          </td>
        </tr>
        <tr>
          <th>Japanese</th>
          <td lang="ja">
            愛知県海部郡飛島村大字飛島新田字竹之郷ヨタレ南ノ割
          </td>
        </tr>
        <tr>
          <th>Arabic</th>
          <td lang="ar" dir="rtl">
            أَفَيَسْتَكْتِبونَكُمانيهِما
          </td>
        </tr>
        <tr>
          <th>URL</th>
          <td>
            https:&shy;//en&shy;.wikipedia&shy;.org&shy;/wiki&shy;/The&shy;_King&shy;_in&shy;_Yellow
          </td>
        </tr>
        <tr>
          <th>Email</th>
          <td>
            JR&shy;-Bob&shy;.Dobbs&shy;@CoSG&shy;.example&shy;.com
          </td>
        </tr>
        <tr>
          <th>Idiom</th>
          <td>
            Chicken/egg
          </td>
        </tr>
        <tr>
          <th>Idiom 2</th>
          <td>
            Chicken / egg
          </td>
        </tr>
      </table>
    </div>
  </div>
</main>
!

CSS 

              
                body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  line-height: 1.4;
  /*   line-height: 1.5; */
  /*   letter-spacing: 0.12em; */
  /*   word-spacing: 0.16em; */
  background-color: #fefefe;
  color: #333;
  /* Changing bit */
  hyphenate-character: auto;
}

h1, h2 {
  line-height: 1;
}

h2 {
  font-size: 100%;
}

main {
  display: flex;
  flex-wrap: wrap;
  gap: 6em;
}

main > div {
/*   flex: 0 0 12em; */
}

/* This kinda has to say in sixth position */
div > div {
  margin: 0;
  background-color: #f3f3f3;
  max-width: 6em;
}

table {
/*   font-size: 90%; */
  border-collapse: collapse;
  width: 100%;
}

caption {
  font-style: italic;
  text-align: left;
}

td, th {
  border: .1em solid #ccc;
  text-align: left;
  padding: 0 .25em;
}

tr:not(:first-of-type) th, tr:not(:first-of-type) td {
  vertical-align: top;
}

/* Changing bits */

table.fixed {
  table-layout: fixed;
}

.word-break {
  word-break: break-all;
}

.overflow-wrap {
/* word-wrap in IE days */
  overflow-wrap: anywhere;
}

.hyphens {
  hyphens: auto;
}

.hyphens.manual {
  hyphens: manual;
}

/* Form bits*/

nav {
  top: 0;
  position: sticky;
  display: flex;
  flex-wrap: wrap;
}

button, input {
  font: inherit;
}

fieldset, legend {
  background-color: #fff;
/*   border: .1em solid #999; */
/*   margin-bottom: .5em; */
}

legend {
/*   padding-right: .5em;
  padding-left: .5em; */
/*   margin-left: -.85em; */
/*   border-right: none; */
/*   border-bottom: none; */
/*   border-top: none; */
}

button {
  border: .1em solid #11c;
  border-radius: .25em;
  padding: .25em .5em;
  color: #fff;
  background: #11c;
  display: inline-block;
  width: auto;
  text-shadow: 1px 1px 1px #000;
  font: inherit;
  font-size: 1rem;
  margin: .2em .1em;
}

button:focus, button:hover {
  outline: .2em solid #99f;
/*   outline-offset: .1em; */
}

button[aria-pressed]::before {
  content: "⊘ ";
}

button[aria-pressed="true"]::before {
  content: "✔ ";
}

button[aria-pressed="true"], button:not([aria-pressed]):active {
  color: #11c;
  background: #eee;
  text-shadow: none;
  border-color: #000;
}

#H1 {
  width: 1.2em;
}

#W1 {
  width: 2em;
}
!

JS 

              
                function tablesLayout(btnID) {
  var losTables = document.querySelectorAll("table");
  if (btnID == "T1") {
    for (var i = 0; i < losTables.length; i++) {
      losTables[i].classList.remove("fixed");
    }
  } else {
    for (var i = 0; i < losTables.length; i++) {
      losTables[i].classList.add("fixed");
    }
  }
  var deToggle = document.querySelectorAll("#T button[aria-pressed]");
  for (var i = 0; i < deToggle.length; i++) {
    deToggle[i].setAttribute("aria-pressed", "false");
  }
  var theButton = document.getElementById(btnID);
  theButton.setAttribute("aria-pressed", "true");
}

function wrappage(btnID) {
  var theButton = document.getElementById(btnID);
  var losDivs = document.querySelectorAll("div>div");
  for (var i = 0; i < losDivs.length; i++) {
    losDivs[i].classList.remove(
      "word-break",
      "overflow-wrap",
      "hyphens",
      "none"
    );
    losDivs[i].classList.add(theButton.innerText);
  }
  var deToggle = document.querySelectorAll("#C button[aria-pressed]");
  for (var i = 0; i < deToggle.length; i++) {
    deToggle[i].setAttribute("aria-pressed", "false");
  }
  theButton.setAttribute("aria-pressed", "true");
}

const JSSbody = document.styleSheets[0].cssRules[0].style;

function setHyphen(txtID) {
  var txtField = document.getElementById(txtID);
  var hyphenVal = txtField.value;
  if (hyphenVal == "") {
    JSSbody.hyphenateCharacter = "auto";
  } else {
    // alert(JSS.hyphenateCharacter);
    // JSS.setProperty("hyphenate-character","'" + hyphenVal + "'");
    JSSbody.hyphenateCharacter = "'" + hyphenVal + "'";
  }
}

const JSSdivdiv = document.styleSheets[0].cssRules[5].style;

function setMaxWidth(txtID) {
  var txtField = document.getElementById(txtID);
  var widthVal = txtField.value;
  if (widthVal == "") {
    JSSdivdiv.maxWidth = "6em";
  } else {
    // alert(JSS.hyphenateCharacter);
    // JSS.setProperty("hyphenate-character","'" + hyphenVal + "'");
    JSSdivdiv.maxWidth = widthVal;
  }
}

// alert(JSSdivdiv.maxWidth);
!
999px

Console