Alex

<p>This plugin ensures that there is only one sticky post published to the site. When a new sticky post is published, previous the ‘sticky’ flag is removed from any other posts, so they will no longer appear at the top of your page.</p>
<h3>Important Notes</h3>
<ul>
<li>I adapted code initially found at http://craiget.com/one-sticky-post-in-wordpress/ Thanks to Craige for posting it! Also, Devin Price (http://wptheming.com/) was immensely helpful as I knocked out a couple of issues regarding scheduled sticky posts.</li>
<li>The first time you publish a sticky post after enabling this plugin, any and <em>all</em> other sticky posts will be changed to not-sticky. There is not a way to automatically reverse this decision, nor is their a log of which posts were changed.</li>
<li>This plugin has not been tested with versions of WordPress prior to 4.0.</li>
<li>Do not use this plugin if you are using another to manage per-category sticky posts. It has not been tested with that setup, and it will most likely mark all of those posts as non-sticky.</li>
</ul>


There Can Be Only One

Ensures that there is only one published sticky post on the site at any given time.

Senff - a11n

<h4>Summary</h4>
<p>The Gutenberg Sticky Block can be added to any Post or Page and will be sticky as soon as it hits the top of the page after you scroll down. The Sticky Block can contain any other Blocks (Paragraphs, Images, etc.), and can also be used <em>in</em> other Blocks (e.g. Column or Table).</p>
<p>The main principle is the same as my <a href="https://wordpress.org/support/plugin/sticky-menu-or-anything-on-scroll" rel="ugc">Sticky Menu (Or Anything)</a> plugin, and the basic code of that plugin has been used in this Sticky Block plugin as well. If you want to make anything sticky outside of the content area (e.g navigation menu, widgets), use the <em>Sticky Menu (Or Anything)</em> plugin instead of Sticky Block.</p>
<p>Featured BLOCK OF THE WEEK (Sep 16, 2021).</p>
<h4>Features</h4>
<ul>
<li><strong>Any Block can be added inside the Sticky Block</strong>: the Sticky Block works as a “wrapper” or “grouping” block, that can hold every other type of Block.</li>
<li><strong>The Sticky Block can be added inside other Blocks</strong>: any block that works as a “wrapper” (such as the Columns Block or the Table Block) can also hold a Sticky Block.</li>
<li><strong>Positioning from top</strong> (optional): you can add any amount of space between the Sticky Block and the top of the page, so that the element is not always stuck at the “ceiling” of the page.</li>
<li><strong>Enable for certain screen sizes only</strong> (optional): you can set a minimum and/or maximum screen size where the stickiness should work. This can be handy if you have a responsive site and you don’t want your Block to be sticky on smaller screens, for example. </li>
<li><strong>Push-up element</strong> (optional): you can pick any other element lower on the page that will push the Sticky Block up again (for example a footer, or even another Sticky Block).</li>
<li><strong>Admin Bar aware</strong>: checks if the current user has an Admin Toolbar at the top of the page. If it has, the Sticky Block will not obscure it (or be obscured by it).</li>
<li><strong>Z-index</strong>: in case there are other elements on the page that obscure or peek through your Sticky Block, you can add a Z-index easily. This will only be applied once the Block is sticky.</li>
</ul>


Sticky Block for Gutenberg Editor

The Gutenberg Sticky Block will stick at the top of the page once you scroll down.

There Can Be Only One vs Sticky Block for Gutenberg Editor