CSS
pre code, .hljs, .nohighlight {
display: block;
padding: 20px;
line-height: 1.6;
overflow-x: auto;
white-space: pre;
color: #c5c8c6;
background-color: #1d1f21;
}PHP
<?php /** @var \Kirby\Cms\Block $block */ ?>
<pre><code class="language-<?= $block->language()->or('text') ?>"><?= $block->code()->html(false) ?></code></pre>
<script>hljs.highlightAll();</script>Javascript
<script>hljs.highlightAll();</script>