Simple Expand – Lightweight Read more toggle

A single shortcode you can drop into any post, page, or text widget to get a click-to-expand “read more” toggle. The output is a native HTML <details> element styled with a small inline stylesheet — nothing else.

The point is the absence of features. There is no settings page, no animation library, no editor block panel with twelve toggles. If you need a read-more on one paragraph in one post, you do not want a plugin that wants to manage your whole site.

Usage:

[expand title="My title"]
The content goes here.
<img src="even-images-can-go-in-here.jpg" />
And wrap up with a closing expand tag.
[/expand]

Supports a custom CSS class via [expand class="my-class"] and works with WordPress oEmbeds and other shortcodes nested inside.

1. Upload /simple-expand/ to the /wp-content/plugins/ directory.
2. Activate the plugin through the Plugins menu in WordPress.
3. Place [expand] shortcodes in your posts or pages.

1. 

   Closed Simple Expand.

2. 

   Open Simple Expand with HTML inside.

1.3

• Added License header to plugin file (wp.org Plugin Check requirement).
• Added direct file access protection (ABSPATH check).
• Added explicit version to wp_register_style() call.
• Tested up to WordPress 6.9.

1.2

• Breaking: CSS class changed from .expand to .jhse-expand. If you have custom CSS targeting .expand, update it to .jhse-expand.
• Custom CSS class support via [expand class="my-class"].
• Use wp_add_inline_style instead of inline style tag.
• Removed duplicate iframe attributes.
• Fixed Plugin URI.
• Tested up to WordPress 6.7.
• Updated minimum PHP requirement to 7.4.

1.1

• Added support for YouTube and other iframe embeds inside expand tag (also WP built in embeds).

1.0.1

• Added support for shortcode in expand tag.

1.0

• Initial release.