Alvaro

<a href="https://gutenberg-showcase.melonpan.io/melonpan-block-code" rel="nofollow ugc">Demo</a> – <a href="https://melonpan.io/wordpress-plugins/melonpan-block-code" rel="nofollow ugc">Documentation</a> – <a href="https://github.com/garciaalvaro/melonpan-block-code" rel="nofollow ugc">GitHub</a>
Block to display code, with highlighted syntax, which can be copied to the clipboard.
<h3>Features</h3>
The block comes with the following settings:
<ul>
<li>Code language: JavaScript, CSS, PHP, etc. <a href="https://prismjs.com/#languages-list" rel="nofollow ugc">Full list of languages</a>.</li>
<li>Color theme</li>
<li>Label: Top left label that can be customized. By default the code language.</li>
<li>Copy button: Top right button to copy the block content.</li>
<li>Padding</li>
<li>Border width and Border radius</li>
</ul>
<h3>Usage</h3>
The block can be found inside the blocks inserter menu under the Melonpan Blocks category. 
Once added in the post you can edit its settings on the Editor sidebar under the Block settings panel. 
Switch between the previewer and editor views to edit the code and see its styled output.

Melonpan Block – Code

Block to display code, with highlighted syntax, which can be copied to the clipboard.

Cuamckuy

Tired to search for normal, easy to install programming code highlight plugin?
This one will help you to end this adventure.
It adds special shortcode [code][/code], keyboard shortcut «alt+c» and button to Visual Editor.
If you want do define highlight syntax language, you may use direct lang param like [code php][/code].
Plugin will also highlight <code><pre class='language-html'>…</pre></code> and <code><code class='language-html'></code></code>, if you don’t want to use shortcode.

Easy Prism Syntax Highlighter

Highlight programming code with Prism.JS script easily.

Melonpan Block – Code vs Easy Prism Syntax Highlighter