Not strictly a Gutenberg/Block Editor problem, but that does make it vastly easier to create incompatible headings.

The regex only matches plain tags:

Any attributes added such as alignment mean the regex won't "find" the heading tag to add to the TOC.

I'd love to use this plugin on my employer's Intranet site. Would would be the most sensible way to modify this plugin so that it only renders a TOC on specific pages?

Hi Automatticians,

I am hoping to use this plugin, but I am getting "Non-static method Table_Of_Contents::init() should not be called statically" when I add it as a plugin and activate it. Any idea why?

The TOC only generate the h3 headings tag, the h4 headings are not listed in the TOC generated

Introduced in WP5.8 https://make.wordpress.org/core/2021/06/29/introducing-update-uri-plugin-header-in-wordpress-5-8/

Since there's another "table-of-contents" plugin in the wporg repo, this would prevent accidental overwrites when updating from the admin.

The plugin can't run with php 8 version, no toc rendered in the page.