coc-markmap
Installation
Make sure coc.nvim is started.
Then install with the Vim command:
:CocInstall coc-markmap
Usage
Open a Markdown file in Vim / Neovim, and execute:
:CocCommand markmap.create
An HTML file with the same basename as the Markdown file will be created and opened in your default browser.
Visualization of selected text is also supported.