How to add code syntax highlight.js to WordPress

wp-content/themes/ActiveTheme/functions.php

function enqueue_highlight_js()
{
	wp_enqueue_style('highlight.min.css', 'https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/base16/outrun-dark.min.css');
	wp_enqueue_script('highlight.min.js', 'https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js');
}

add_action('wp_enqueue_scripts', 'enqueue_highlight_js', 100);

function initiate_highlight_js()
{
?>
	<script>
		hljs.highlightAll();
	</script>
<?php
}
add_action('wp_head', 'initiate_highlight_js');

<pre><code>source code...</code></pre>