ShinichiN

This plugin enables you to create unlimited custom sidebar/widget areas and switch existing areas. You can do this without touching your theme.
This plugin utilizes term meta api and so it works only with WordPress 4.4 and above.
Your theme needs to use <code>is_active_sidebar()</code> when calling <code>dynamic_sidebar()</code> function.
This will work.
<pre><code>if ( is_active_sidebar( 'sidebar-1' ) ) {
 dynamic_sidebar( 'sidebar-1' );
}
</code></pre>
This doesn’t work.
<pre><code>dynamic_sidebar( 'sidebar-1' );
</code></pre>
If you only want to output your custom sidebar, put this code on where you want to display the sidebar in your theme.
<pre><code>do_action( 'dynamically_dynamic_sidebar' );
</code></pre>
<a href="https://github.com/ShinichiNishikawa/Dynamically-Dynamic-Sidebar/" rel="nofollow ugc">This Plugin published on GitHub.</a>
ウィジェットエリアをいくつでも定義し、カテゴリやタグ、カスタム分類ごとに差し替えたり、投稿・ページ・カスタム投稿から使いたいサイドバーを指定したりすることができます。「スクリーンショット」のタブをごらんいただくと、イメージが湧きやすいと思います。

Dynamically Dynamic Sidebar

Create unlimited custom sidebar/widget areas and switch existing areas depending on post, page, custom-post-type post, categories, tags and custom tax …

itsdavidmorgan

Organic Themes

The Widget Area Block allows for multiple custom Widget Areas to be created on any page or post using the Gutenberg block editor. As a result, traditional widgets can be used along side blocks within your content. The plugin can be used to create new sidebars within layout blocks, or add widgets directly within your content.
There are many useful widgets that cannot be used with the WordPress 5 block editor. This custom block is designed to remedy that problem.
Simply add the Widget Area Block anywhere within your content. Then, name your custom Widget Area. Then, click the Customizer View button to add widgets to that section within the WordPress Customizer.
This block work perfectly with the <a href="https://organicthemes.com/builder/" title="Organic Builder Widgets Pro" rel="nofollow ugc">Organic Builder Widgets Pro</a> builder plugin. So, widgets and blocks can be used side-by-side to create dynamic page content.
Video Demo:
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/ES-8H2aqryA?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<h4>Get More Premium Blocks!</h4>
The <a href="https://organicthemes.com/blocks/" title="Organic Blocks Bundle" rel="nofollow ugc">Organic Blocks Bundle</a> includes several premium blocks for the Gutenberg editor. The collection of blocks are designed to work with any WordPress theme.
<ul>
<li>Content Slideshow Block <a href="https://organicthemes.com/block/content-slideshow-block/" title="Content Slideshow Example" rel="nofollow ugc">View Example</a> – Display a custom slideshow of your posts or pages anywhere on your site.</li>
<li>Posts Block <a href="https://organicthemes.com/block/posts-block/" title="Posts Block Example" rel="nofollow ugc">View Example</a> – Showcase any post type in a customizable blog style layout.</li>
<li>Portfolio Block <a href="https://organicthemes.com/block/portfolio-block/" title="Portfolio Block Example" rel="nofollow ugc">View Example</a> – Display a customizable portfolio of posts on any page of your website.</li>
<li>Profile Block <a href="https://organicthemes.com/block/profile-block/" title="Profile Block Example" rel="nofollow ugc">View Example</a> – Feature personal profiles for authors or team members with endless social media links.</li>
<li>Testimonials Block <a href="https://organicthemes.com/block/testimonials-block/" title="Testimonials Block Example" rel="nofollow ugc">View Example</a> – Showcase a slideshow of customer testimonials from any custom post type, even the Jetpack testimonials post type.</li>
<li>Pages Block <a href="https://organicthemes.com/block/pages-block/" title="Pages Example" rel="nofollow ugc">View Example</a> – Display a group of featured pages on any page or post. An excellent block for building custom home page layouts.</li>
<li>Header Block <a href="https://organicthemes.com/block/header-block/" title="Header Block Example" rel="nofollow ugc">View Example</a> – Create custom headers for your website. The header block allows for the adding of logos, custom menus, and more.</li>
<li>Footer Block <a href="https://organicthemes.com/block/footer-block/" title="Footer Block Example" rel="nofollow ugc">View Example</a> – Similar to the Header Block, create custom footers for your website.</li>
</ul>
<h4>Getting Started</h4>
Follow the simple steps below to use the Widget Area Block:
<ol>
<li>Within a Page or Post, select ‘Widget Area Block’ located within the ‘Widgets’ section.</li>
<li>Add a unique name to your Widget Area.</li>
<li>Click the ‘Update’ button.</li>
<li>Click the ‘Customizer View’ button. The Customizer will launch, displaying your current page or post.</li>
<li>Begin adding widgets to Widget Area within the Customizer.</li>
</ol>

Organic Widget Area Block

Great plugin that does exactly what it says. Easy to use and add widgets into your posts or pages through a Gutenberg block. Clean code.

Good plugin

The Widget Area Block allows for multiple custom Widget Areas to be created on any page or post using the Gutenberg block editor.

Dynamically Dynamic Sidebar vs Organic Widget Area Block