Mary Rose Elbambo

BlockGlow adds a “BlockGlow — Custom CSS” panel to the inspector of every block. Use it to scope custom CSS to a single block instance. The plugin stores CSS in the uploads folder (under uploads/blockglow/) and enqueues the generated CSS file when rendering on the front end. If the uploads directory isn’t writable or file write fails, BlockGlow will fall back to outputting inline styles.
Key features:
<ul>
<li>Adds two block attributes to every block: <code>blockglowCustomCSS</code> and <code>blockglowId</code>.</li>
<li>Inspector panel with a CodeMirror-backed code editor (if WordPress provides it) or a fallback textarea supporting Tab and Shift+Tab outdent.</li>
<li>Live preview inside the block editor: custom CSS is scoped to the block in the editor so you can see the effect while editing.</li>
<li>CSS files are saved to <code>wp-content/uploads/blockglow/blockglow-<id>.css</code> and enqueued on the front end as a linked stylesheet; files are removed automatically when you clear the Custom CSS field.</li>
<li>Graceful fallback to inline styles when file writing isn’t possible.</li>
</ul>
How scoping works:
BlockGlow creates a unique <code>blockglowId</code> for each block instance and scopes your CSS with a wrapper selector like:
<pre><code>[data-blockglow-id="bg-xxxxxxx"] { /* your declarations */ }
</code></pre>
For convenience you can use <code>&</code> as the wrapper shorthand in the editor. Example:
<pre><code>& .my-class { color: red; }
</code></pre>
The plugin will replace <code>&</code> with the wrapper selector for both editor preview and front-end output.
<h3>Support</h3>
If you find issues or want improvements (for example: limiting who can edit per-block CSS, collecting styles into a single head include, or adding an admin UI to manage generated CSS files), open an issue in the repository or reply here and I will assist.

BlockGlow — Per-block Custom CSS

Adds a "Custom CSS" inspector panel to every Gutenberg block and saves per-block CSS files to uploads for front-end enqueuing.

SilkyPress

Customize your WordPress site’s appearance by easily adding custom CSS and JS code without even having to modify your theme or plugin files. This is perfect for adding custom CSS tweaks to your site.
<h4>Features</h4>
<ul>
<li>Text editor with syntax highlighting </li>
<li>Print the code inline or included into an external file</li>
<li>Print the code in the header or the footer</li>
<li>Add CSS or JS to the frontend or the admin side</li>
<li>Add as many codes as you want</li>
<li>Keep your changes also when you change the theme</li>
</ul>

Simple Custom CSS and JS


When saving CSS as external file, I'm disappointed that you can't name the css file, you can change the permalink and then a duplicate CSS file is created with the name but it is still not used by this plugin.It is much better than Jetpack's version which is horrible.



I have now stopped using it as it also forces you to load the CSS where I needed to conditionally include it, I am now using a text editor, FTP, and wp_enqueue_style() in a child functions.php.  Much easier (at least after working it out), the below code added before the html header started (not sure if that matters):



//===========================================================================
function CompanyHeaderAssets()
//===========================================================================
{
    //--- Main Company CSS ------------------------------------------------
    $CssDir  = '/wp-content/themes/oceanwp-child-theme-master/';
    $CssName = 'Company CSS for Dynamic Pages.css';
    wp_enqueue_style("CompanyCss4All", "{$CssDir}{$CssName}", '', time());

    //--- Main Company CSS 4 ADMINS ---------------------------------------
    if  (IsCompanyVolunteer())
    {
        //--- Not displaying to visitors ------------------------------------
        $CssName = 'Company CSS for Image Gallery Metadata Tooltips (Volunteers Only).css';
        wp_enqueue_style("CompanyCss4StaffOnly4ImageMetadata", "{$CssDir}{$CssName}", '', time());
    }
}
add_action( 'wp_enqueue_scripts', 'CompanyHeaderAssets' );


Good Except Can't Name Files (4567.css etc)


This is a nice handy plugin, but it seems to not load CSS on Elementor pages for some reason. Otherwise nice plugin.


Handy plugin but...


This plugin does flush all permalinks settings on install, without confirmation of Admin, which impacted the whole permalinks settings, and required me to deactivate and reactivate multiple plugins to get their permalinks settings setup again, which is loss of time and requires a clear confirmation before doing that on install.


Impacted the permalinks

Just what I was looking for

Easily add Custom CSS or JS to your website with an awesome editor.

BlockGlow — Per-block Custom CSS vs Simple Custom CSS and JS