Post title text formatting

[strarsis]

Is your feature request related to a problem? Please describe.
It would be nice to be able to format the heading of a post.
Currently, only plain text is possible.
This can have many useful applications, from just emphasizing a piece of title to splitting it in the theme, like the Page Title Splitter plugin does with the Classic Editor in a custom way.

Describe the solution you'd like
Allow/offer text formatting for the post heading field.

Describe alternatives you've considered
HTML tags inside the heading.

[talldan]

Related #19491.

[skorasaurus]

While you're in the block editor, are you referring to the heading block or the post's title?

[strarsis]

@skorasaurus: I mean the posts/pages title.
The new full site editing blocks also offers an explicit heading block -
but can the text inside the heading block further formatted?

[skorasaurus]

@skorasaurus: I mean the posts/pages title. The new full site editing blocks also offers an explicit heading block - but can the text inside the heading block further formatted?

The text inside a 'standard' heading block that's not a post title can be marked up as a link, boldened, and italicized; additional text formatting can be provided by plugins like editorskit, aka block-options.

The FSE post title block has options to change the formatting (text size, whether to change the case (all caps, all lower case), font weight (should the font be thick, thin, etc)).

[github-actions]

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[carolinan]

@strarsis I believe this is referring to the actual post and page title at the top of the editor, not the blocks?
This "post heading" ?

[strarsis]

Yes. I need "micro-formatting" of that text.

[carolinan]

You can format the title, but not with controls in the block editor itself.

• Using theme.json, by adding styles to the post title block
• Using the global styles setting for the post title block
• using CSS applied to wp-block-post-title

[strarsis]

Formatting the title as a whole is possible. But sometimes I may want to format a part of it, as of making a part of it bold or italic.