[Feature request] Support text highlighting with ==

[pro-anon]

Obsidian’s markdown has the feature of highlighting text surrounded by ==
I think they just replace == with the html mark tag. So that
==text==
Becomes
<mark>text</mark>

[jian-ke]

I'm looking for this too. Now in nvim, ==text== is highlighted, but preview page in web brower is not.

[jian-ke]

Obsidian’s markdown has the feature of highlighting text surrounded by == I think they just replace == with the html mark tag. So that ==text== Becomes <mark>text</mark>

maybe you can my patch below: #684