Christopher Su

BBCode Widget Titles is a very simple, lightweight plugin that allows for the use of BBCode in styling widget titles. 
It currently supports the [b], [i], [u], [s], [url=], and [color=]. Simply install the plugin and BBCode will be 
parsed in widget titles.
This plugin has been tested to work up to 3.4.2. Please <a href="http://christophersu.org/contact/" rel="nofollow ugc">contact me</a> if you experience any problems with this plugin or have any questions.

BBCode Widget Titles

Allows for the use of BBCode in styling widget titles. Supports [b], [i], [u], [s], [url=], and [color=].

Sergey Z.

Sergey Kuzmich

The plugin allows to create content spoilers with Guttenberg block or simple shortcode.
<pre><code>[spoiler title="Expand Me"]Spoiler content[/spoiler]
</code></pre>

Inline Spoilers

The plugin allows to create content spoilers with Guttenberg block or simple shortcode.

BBCode Widget Titles vs Inline Spoilers