Adding Class to Default Wordpress Gutenberg Blocks?
127723
Gutenberg extend blocks add new class name
142159
Add & remove active class from a navigation link
89797
Add a selection of default tags to all metas
132812
WordPress twenty eleven sidebar on Pages
133014
Remove type attribute from script and style tags added by WordPress
56972
Adding a CSS, JS and HTML code to a block
21182
Is it okay to add id/class to  tag?
92407
Can I force WordPress to use  instead of ?
48562
Implement ```-style (fenced) Markdown code blocks
152667
Add class name to post thumbnail
153703
Wordpress default menu in database
76595
WP 3.1 - archive pages for custom content types possible now without a plugin?
32999
How do I add a class to the HTML "body" tag programmatically?
126624
Including another class in SCSS
109777
Can't add default comments to custom post type
111021
Add class based on published state
68718
Do plugin files have to follow a specific convention to be "picked up" by WordPress?