Post

Tailwind Prose Cheatsheet

Install

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npm install -D @tailwindcss/typography
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// tailwind.config.js
plugins: [require('@tailwindcss/typography')]

Basic usage

Wrap any block of HTML (CMS content, markdown output, etc) with prose:

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<div class="prose">
  <h1>Title</h1>
  <p>Paragraph text...</p>
</div>

No extra classes needed on child elements. Prose styles h1–h6, p, a, blockquote, code, pre, ul, ol, li, table, img, hr automatically.


Size modifiers

ClassBase font size
prose-sm14px
prose16px (default)
prose-base16px
prose-lg18px
prose-xl20px
prose-2xl24px
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<div class="prose prose-lg">...</div>

Color modifiers

Built-in color variants map to Tailwind’s color palette:

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<div class="prose prose-slate">...</div>
<div class="prose prose-zinc">...</div>
<div class="prose prose-neutral">...</div>
<div class="prose prose-gray">...</div>
<div class="prose prose-stone">...</div>

These control the text color of headings, body, links, etc.


Dark mode

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<div class="prose dark:prose-invert">...</div>

prose-invert flips all colors for dark backgrounds. Enable dark mode in tailwind config first:

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// tailwind.config.js
darkMode: 'class'

Element-level modifiers

Override styles for specific elements using prose-{element}: prefix:

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<div class="prose prose-headings:font-bold prose-headings:text-blue-600">...</div>
<div class="prose prose-a:text-blue-500 prose-a:no-underline hover:prose-a:underline">...</div>
<div class="prose prose-blockquote:border-blue-500 prose-blockquote:italic">...</div>
<div class="prose prose-code:text-pink-500 prose-code:bg-gray-100">...</div>
<div class="prose prose-img:rounded-lg prose-img:shadow-md">...</div>

All available element modifiers

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prose-headings:    h1, h2, h3, h4, th
prose-lead:        [class~="lead"]
prose-h1:
prose-h2:
prose-h3:
prose-h4:
prose-p:
prose-a:
prose-blockquote:
prose-figure:
prose-figcaption:
prose-strong:
prose-em:
prose-kbd:
prose-code:
prose-pre:
prose-ol:
prose-ul:
prose-li:
prose-table:
prose-thead:
prose-tr:
prose-th:
prose-td:
prose-img:
prose-video:
prose-hr:

Remove prose from a child element

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<div class="prose">
  <p>Styled by prose</p>
  <div class="not-prose">
    <!-- Nothing here gets prose styles -->
    <p>Unstyled</p>
  </div>
</div>

Responsive prose

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<div class="prose md:prose-lg xl:prose-xl">...</div>

Custom configuration

Override defaults in tailwind.config.js:

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theme: {
  extend: {
    typography: {
      DEFAULT: {
        css: {
          color: '#333',
          a: {
            color: '#3182ce',
            '&:hover': {
              color: '#2c5282',
            },
          },
          h1: {
            fontWeight: '800',
          },
          'code::before': {
            content: '""',
          },
          'code::after': {
            content: '""',
          },
        },
      },
    },
  },
},

Remove the backtick quotes around code by setting code::before and code::after content to empty strings (shown above).


Common patterns

CMS/WYSIWYG output

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<article class="prose prose-lg prose-slate max-w-none dark:prose-invert">
  ## Install

```bash
npm install -D @tailwindcss/typography
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// tailwind.config.js
plugins: [require('@tailwindcss/typography')]

Basic usage

Wrap any block of HTML (CMS content, markdown output, etc) with prose:

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<div class="prose">
  <h1>Title</h1>
  <p>Paragraph text...</p>
</div>

No extra classes needed on child elements. Prose styles h1–h6, p, a, blockquote, code, pre, ul, ol, li, table, img, hr automatically.


Size modifiers

ClassBase font size
prose-sm14px
prose16px (default)
prose-base16px
prose-lg18px
prose-xl20px
prose-2xl24px
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<div class="prose prose-lg">...</div>

Color modifiers

Built-in color variants map to Tailwind’s color palette:

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<div class="prose prose-slate">...</div>
<div class="prose prose-zinc">...</div>
<div class="prose prose-neutral">...</div>
<div class="prose prose-gray">...</div>
<div class="prose prose-stone">...</div>

These control the text color of headings, body, links, etc.


Dark mode

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<div class="prose dark:prose-invert">...</div>

prose-invert flips all colors for dark backgrounds. Enable dark mode in tailwind config first:

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// tailwind.config.js
darkMode: 'class'

Element-level modifiers

Override styles for specific elements using prose-{element}: prefix:

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<div class="prose prose-headings:font-bold prose-headings:text-blue-600">...</div>
<div class="prose prose-a:text-blue-500 prose-a:no-underline hover:prose-a:underline">...</div>
<div class="prose prose-blockquote:border-blue-500 prose-blockquote:italic">...</div>
<div class="prose prose-code:text-pink-500 prose-code:bg-gray-100">...</div>
<div class="prose prose-img:rounded-lg prose-img:shadow-md">...</div>

All available element modifiers

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prose-headings:    h1, h2, h3, h4, th
prose-lead:        [class~="lead"]
prose-h1:
prose-h2:
prose-h3:
prose-h4:
prose-p:
prose-a:
prose-blockquote:
prose-figure:
prose-figcaption:
prose-strong:
prose-em:
prose-kbd:
prose-code:
prose-pre:
prose-ol:
prose-ul:
prose-li:
prose-table:
prose-thead:
prose-tr:
prose-th:
prose-td:
prose-img:
prose-video:
prose-hr:

Remove prose from a child element

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<div class="prose">
  <p>Styled by prose</p>
  <div class="not-prose">
    <!-- Nothing here gets prose styles -->
    <p>Unstyled</p>
  </div>
</div>

Responsive prose

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<div class="prose md:prose-lg xl:prose-xl">...</div>

Custom configuration

Override defaults in tailwind.config.js:

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theme: {
  extend: {
    typography: {
      DEFAULT: {
        css: {
          color: '#333',
          a: {
            color: '#3182ce',
            '&:hover': {
              color: '#2c5282',
            },
          },
          h1: {
            fontWeight: '800',
          },
          'code::before': {
            content: '""',
          },
          'code::after': {
            content: '""',
          },
        },
      },
    },
  },
},

Remove the backtick quotes around code by setting code::before and code::after content to empty strings (shown above).


Common patterns

CMS/WYSIWYG output

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<article class="prose prose-lg prose-slate max-w-none dark:prose-invert">
  {{ page.content }}
</article>

max-w-none removes the default max-width constraint (defaults to ~65ch).

Card with prose content

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<div class="max-w-2xl mx-auto p-6">
  <div class="prose prose-sm">
    {{ content }}
  </div>
</div>
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<div class="prose prose-a:text-indigo-600 prose-a:font-semibold">...</div>

What prose does NOT do

  • Does not style elements outside the prose container
  • Does not apply to dynamically injected content unless it’s inside the wrapper
  • Does not work well with heavily nested Tailwind utility classes — use not-prose to escape

</article>

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`max-w-none` removes the default max-width constraint (defaults to ~65ch).

### Card with prose content

```html
<div class="max-w-2xl mx-auto p-6">
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    <h1 data-toc-skip>Drupal Preprocess Functions</h1>
    

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  <div class="content">
    <p>Preprocess functions are used to modify variables before they are used in the template.
This allows developers to customize the output of a page without having to modify the template itself.
Preprocess functions are used to add, remove, or alter variables that are used in the template.</p>

<p>Preprocess functions are typically used when you need to modify the variables that are used in the template.
For example, if you need to add a custom variable to the template,
you can use a preprocess function to do so.</p>

<h3 id="where-to-add-these-functions"><span class="me-2">Where to add these functions</span><a href="#where-to-add-these-functions" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<p><code class="language-plaintext highlighter-rouge">themename.theme</code></p>

<h3 id="overview"><span class="me-2">Overview</span><a href="#overview" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<ul>
  <li>preprocess functions are optional - if they can be used they will be if not they will be skipped</li>
  <li>preprocess functions are Specific to a template (hook) based on naming convention</li>
  <li>preprocess functions always has 1 param</li>
</ul>

<h3 id="when-to-use-preprocess-functions"><span class="me-2">When to use Preprocess functions</span><a href="#when-to-use-preprocess-functions" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<ul>
  <li>Use a preprocess function to alter/remove or add variables</li>
  <li>Make small alterations to the html output</li>
  <li>Any logic that is more complex then a simple if / else file consider refactoring into a preprocess
function to keep template files nice and clean.</li>
</ul>

<h3 id="naming-convention"><span class="me-2">Naming Convention</span><a href="#naming-convention" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<p><code class="language-plaintext highlighter-rouge">function THEME_preprocess_H00K()</code></p>

<ul>
  <li>HOOK is the name of the template your preprocessing variables for</li>
</ul>

<p>The easiest way to determine what <code class="language-plaintext highlighter-rouge">hook</code> to use is to enable twig debug mode</p>

<h3 id="example"><span class="me-2">Example</span><a href="#example" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
2
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</pre></td><td class="rouge-code"><pre><span class="k">function</span> <span class="n">THEMENAME_preprocess_node</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>
   <span class="nv">$variables</span><span class="p">[</span><span class="s1">'simple_string'</span><span class="p">]</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
   <span class="s1">'#markup'</span> <span class="o">=&gt;</span> <span class="s1">'a simple_string'</span>
   <span class="p">);</span>
<span class="p">}</span>
</pre></td></tr></tbody></table></code></div></div>

<div class="language-twig highlighter-rouge"><div class="code-header">
        <span data-label-text="Twig"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
2
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</pre></td><td class="rouge-code"><pre><span class="nt">&lt;div</span> <span class="na">class = </span><span class="s">"string"</span><span class="nt">&gt;</span>
   
<span class="nt">&lt;/div&gt;</span>
</pre></td></tr></tbody></table></code></div></div>

<p>** Example - Add suffix to post author lable if logged in **</p>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
2
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</pre></td><td class="rouge-code"><pre><span class="k">function</span> <span class="n">THEMENAME_preprocess_node</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>
   <span class="k">if</span><span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'logged_in'</span><span class="p">]</span> <span class="o">==</span> <span class="kc">TRUE</span> <span class="o">&amp;&amp;</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'node'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">getOwnerId</span><span class="p">()</span> <span class="o">==</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'user'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">id</span><span class="p">())</span> <span class="p">{</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'label'</span><span class="p">][</span><span class="s1">'#suffix'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'-you are the author'</span><span class="p">;</span>
   <span class="p">}</span>
<span class="p">}</span>
</pre></td></tr></tbody></table></code></div></div>

<p>** Example - Add new variable to template **</p>

<p>Use twig dump function to see the new variable added to the template</p>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
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</pre></td><td class="rouge-code"><pre><span class="k">function</span> <span class="n">THEMENAME_preprocess_node</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>
   <span class="nv">$variables</span><span class="p">[</span><span class="s1">'current_user_is_owner'</span><span class="p">]</span> <span class="o">=</span> <span class="kc">FALSE</span><span class="p">;</span>

   <span class="k">if</span><span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'logged_in'</span><span class="p">]</span> <span class="o">==</span> <span class="kc">TRUE</span> <span class="o">&amp;&amp;</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'node'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">getOwnerId</span><span class="p">()</span> <span class="o">==</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'user'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">id</span><span class="p">())</span> <span class="p">{</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'label'</span><span class="p">][</span><span class="s1">'#suffix'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'-you are the author'</span><span class="p">;</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'current_user_is_owner'</span><span class="p">]</span> <span class="o">=</span> <span class="kc">TRUE</span><span class="p">;</span>
      <span class="p">}</span>
<span class="p">}</span>
</pre></td></tr></tbody></table></code></div></div>

<h3 id="function-naming-conventions"><span class="me-2">Function Naming Conventions</span><a href="#function-naming-conventions" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<p>Function THEME_preprocess_HOOK()</p>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
2
</pre></td><td class="rouge-code"><pre><span class="o">**</span><span class="n">example</span><span class="o">**</span>
<span class="k">function</span> <span class="n">bartik_preprocess_page</span><span class="p">()</span>
</pre></td></tr></tbody></table></code></div></div>

<p>** More specific targeting example **</p>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
2
3
</pre></td><td class="rouge-code"><pre><span class="nf">THEMENAME_preprocess_node__42</span><span class="p">()</span><span class="o">:</span> <span class="nc">This</span> <span class="n">is</span> <span class="n">the</span> <span class="n">most</span> <span class="n">specific</span> <span class="n">version</span> <span class="k">and</span> <span class="n">will</span> <span class="n">only</span> <span class="n">be</span> <span class="n">called</span> <span class="k">for</span> <span class="n">a</span> <span class="n">node</span> <span class="n">with</span> <span class="n">an</span> <span class="no">ID</span> <span class="n">of</span> <span class="mf">42.</span>
<span class="nf">THEMENAME_preprocess_node__article</span><span class="p">()</span><span class="o">:</span> <span class="nc">This</span> <span class="n">would</span> <span class="n">be</span> <span class="n">called</span> <span class="k">for</span> <span class="n">any</span> <span class="n">article</span> <span class="n">node</span><span class="p">,</span> <span class="n">but</span> <span class="n">not</span> <span class="k">for</span> <span class="n">other</span> <span class="n">node</span> <span class="n">types</span><span class="mf">.</span>
<span class="nf">THEMENAME_preprocess_node</span><span class="p">()</span><span class="o">:</span> <span class="nc">This</span> <span class="n">will</span> <span class="n">be</span> <span class="n">called</span> <span class="k">for</span> <span class="n">all</span> <span class="n">nodes</span><span class="mf">.</span>
</pre></td></tr></tbody></table></code></div></div>

<ul>
  <li>The hook refers to the base name of the template file</li>
  <li>Use Twig Debug to find the hook name for the template file</li>
</ul>

<p>You can ommit the hook part and add hook as param instead, for adding a variable to every template file - warning this will be called alot</p>

<h3 id="prepocess-examples"><span class="me-2">Prepocess Examples</span><a href="#prepocess-examples" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<h4 id="inject-var-into-every-template"><span class="me-2">Inject var into every template</span><a href="#inject-var-into-every-template" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h4>

<div class="language-js highlighter-rouge"><div class="code-header">
        <span data-label-text="JavaScript"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
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</pre></td><td class="rouge-code"><pre>
<span class="kd">function</span> <span class="nf">THEMENAME_preprocess</span><span class="p">(</span><span class="o">&amp;</span><span class="nx">$variables</span><span class="p">,</span> <span class="nx">$hook</span><span class="p">)</span>
</pre></td></tr></tbody></table></code></div></div>

<h4 id="dynamically-add-layout-class-to-a-field"><span class="me-2">Dynamically add layout class to a field</span><a href="#dynamically-add-layout-class-to-a-field" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h4>

<p>Based on a boolean value which is set in the paragraph block.</p>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
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</pre></td><td class="rouge-code"><pre><span class="k">function</span> <span class="n">THEME_preprocess_paragraph</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>
  <span class="c1">// Get the paragraph type.</span>
  <span class="nv">$paragraph_type</span> <span class="o">=</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'paragraph'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">bundle</span><span class="p">();</span>

  <span class="k">if</span> <span class="p">(</span><span class="nv">$paragraph_type</span> <span class="o">===</span> <span class="s1">'cards'</span><span class="p">)</span> <span class="p">{</span>
    <span class="c1">// Add a class to the paragraph's attributes.</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'container cards__wrapper'</span><span class="p">;</span>

    <span class="c1">//dynamically add layout class to cards to set the layout</span>
    <span class="c1">// Access the boolean field value.</span>
    <span class="nv">$boolean_value</span> <span class="o">=</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'paragraph'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">get</span><span class="p">(</span><span class="s1">'field_brand'</span><span class="p">)</span><span class="o">-&gt;</span><span class="n">value</span><span class="p">;</span>

    <span class="c1">// Add a variable for use in the Twig template.</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'is_active'</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">bool</span><span class="p">)</span> <span class="nv">$boolean_value</span><span class="p">;</span>

    <span class="c1">// Optionally, add logic based on the value.</span>
    <span class="k">if</span> <span class="p">(</span><span class="nv">$boolean_value</span><span class="p">)</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="k">isset</span><span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'content'</span><span class="p">][</span><span class="s1">'field_card_micro_content'</span><span class="p">]))</span> <span class="p">{</span>
        <span class="c1">// Add a custom CSS class to the field wrapper.</span>
        <span class="nv">$variables</span><span class="p">[</span><span class="s1">'content'</span><span class="p">][</span><span class="s1">'field_card_micro_content'</span><span class="p">][</span><span class="s1">'#attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'row-cols-2'</span><span class="p">;</span>
      <span class="p">}</span>
    <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="k">isset</span><span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'content'</span><span class="p">][</span><span class="s1">'field_card_micro_content'</span><span class="p">]))</span> <span class="p">{</span>
        <span class="c1">// Add a custom CSS class to the field wrapper.</span>
        <span class="nv">$variables</span><span class="p">[</span><span class="s1">'content'</span><span class="p">][</span><span class="s1">'field_card_micro_content'</span><span class="p">][</span><span class="s1">'#attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'row-cols-4'</span><span class="p">;</span>
      <span class="p">}</span>
    <span class="p">}</span>
  <span class="p">}</span>
  <span class="p">}</span>
</pre></td></tr></tbody></table></code></div></div>

<h4 id="extensive-example"><span class="me-2">Extensive example</span><a href="#extensive-example" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h4>

<div class="language-php highlighter-rouge"><div class="code-header">
        <span data-label-text="PHP"><i class="fas fa-code fa-fw small"></i></span>
      <button aria-label="copy" data-title-succeed="Copied!"><i class="far fa-clipboard"></i></button></div><div class="highlight"><code><table class="rouge-table"><tbody><tr><td class="rouge-gutter gl"><pre class="lineno">1
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</pre></td><td class="rouge-code"><pre><span class="k">function</span> <span class="n">DERO_preprocess_field</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>

  <span class="cd">/**
   * title 1 for edge advantage
   */</span>
    <span class="k">if</span> <span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'field_dero_edge_title_1'</span><span class="p">)</span> <span class="p">{</span>
      <span class="c1">// Pass a flag or tag type to the template.</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'custom_tag'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'h3'</span><span class="p">;</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'edge-advantage__title'</span><span class="p">;</span>
    <span class="p">}</span>

  <span class="cd">/**
   * title 2 for edge advantage
   */</span>
  <span class="k">if</span> <span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'field_dero_edge_title_2'</span><span class="p">)</span> <span class="p">{</span>
    <span class="c1">// Pass a flag or tag type to the template.</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'custom_tag'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'h3'</span><span class="p">;</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'edge-advantage__title'</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="cd">/**
   * title 3 for edge advantage
   */</span>
  <span class="k">if</span> <span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'field_dero_edge_title_3'</span><span class="p">)</span> <span class="p">{</span>
    <span class="c1">// Pass a flag or tag type to the template.</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'custom_tag'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'h3'</span><span class="p">;</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'edge-advantage__title'</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="c1">// Add a custom CSS class to edge_text field</span>
  <span class="k">if</span> <span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'field_dero_edge_text_1'</span><span class="p">)</span> <span class="p">{</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'edge-advantage__text'</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'field_dero_edge_text_2'</span><span class="p">)</span> <span class="p">{</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'edge-advantage__text'</span><span class="p">;</span>
  <span class="p">}</span>

  <span class="k">if</span> <span class="p">(</span><span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'field_dero_edge_text_3'</span><span class="p">)</span> <span class="p">{</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'edge-advantage__text'</span><span class="p">;</span>
  <span class="p">}</span>
<span class="p">}</span>

<span class="c1">//More efficient way to add classes to fields</span>

<span class="k">function</span> <span class="n">DERO_preprocess_field</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>
  <span class="c1">// Define a mapping of field names to CSS classes.</span>
  <span class="nv">$field_class_map</span> <span class="o">=</span> <span class="p">[</span>
    <span class="s1">'field_stat_number_1'</span> <span class="o">=&gt;</span> <span class="s1">'stats__number'</span><span class="p">,</span>
    <span class="s1">'field_stat_number_2'</span> <span class="o">=&gt;</span> <span class="s1">'stats__number'</span><span class="p">,</span>
  <span class="p">];</span>

  <span class="c1">// Check if the current field is in the map and apply the corresponding class.</span>
  <span class="nv">$field_name</span> <span class="o">=</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'element'</span><span class="p">][</span><span class="s1">'#field_name'</span><span class="p">];</span>
  <span class="k">if</span> <span class="p">(</span><span class="k">isset</span><span class="p">(</span><span class="nv">$field_class_map</span><span class="p">[</span><span class="nv">$field_name</span><span class="p">]))</span> <span class="p">{</span>
    <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="nv">$field_class_map</span><span class="p">[</span><span class="nv">$field_name</span><span class="p">];</span>
  <span class="p">}</span>
<span class="p">}</span>

<span class="c1">//Target paragraphs on a page</span>

<span class="k">function</span> <span class="n">THEMENAME_preprocess_paragraph</span><span class="p">(</span><span class="o">&amp;</span><span class="nv">$variables</span><span class="p">)</span> <span class="p">{</span>

  <span class="cd">/**
   * Implements hook_preprocess_paragraph().
   */</span>
    <span class="c1">// Get the paragraph type.</span>
    <span class="nv">$paragraph_type</span> <span class="o">=</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'paragraph'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">bundle</span><span class="p">();</span>

    <span class="c1">// Add a CSS class based on paragraph type.</span>
    <span class="k">if</span> <span class="p">(</span><span class="nv">$paragraph_type</span> <span class="o">===</span> <span class="s1">'stats'</span><span class="p">)</span> <span class="p">{</span>
      <span class="c1">// Add a class to the paragraph's attributes.</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'container stats__wrapper'</span><span class="p">;</span>
    <span class="p">}</span>

    <span class="c1">// Add a class based on specific conditions.</span>
    <span class="k">if</span> <span class="p">(</span><span class="nv">$paragraph_type</span> <span class="o">===</span> <span class="s1">'image_block'</span> <span class="o">&amp;&amp;</span> <span class="nv">$variables</span><span class="p">[</span><span class="s1">'paragraph'</span><span class="p">]</span><span class="o">-&gt;</span><span class="nf">id</span><span class="p">()</span> <span class="o">==</span> <span class="mi">123</span><span class="p">)</span> <span class="p">{</span>
      <span class="nv">$variables</span><span class="p">[</span><span class="s1">'attributes'</span><span class="p">][</span><span class="s1">'class'</span><span class="p">][]</span> <span class="o">=</span> <span class="s1">'special-image-block-class'</span><span class="p">;</span>
    <span class="p">}</span>
<span class="p">}</span>
</pre></td></tr></tbody></table></code></div></div>

<h3 id="more-info"><span class="me-2">More info</span><a href="#more-info" class="anchor text-muted"><i class="fas fa-hashtag"></i></a></h3>

<p><a href="https://drupalize.me/tutorial/change-variables-preprocess-functions?p=2512">more</a></p>

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1
<div class="prose prose-a:text-indigo-600 prose-a:font-semibold">...</div>

What prose does NOT do

  • Does not style elements outside the prose container
  • Does not apply to dynamically injected content unless it’s inside the wrapper
  • Does not work well with heavily nested Tailwind utility classes — use not-prose to escape
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