Konfekt / vim-zeal

Quickly look up zeal documentation from Vim

This Vim plug-in binds <F1> to showing the documentation of the keyword under the cursor in the offline documentation browser Zeal. If there's no keyword, hitting <F1> shows a documentation entry page

To fall back to showing DevDocs in a browser, in case no zeal documentation is defined, install @romainl 's vim-devdocs and add to your vimrc

augroup DevDocs
  autocmd!
  autocmd Filetype * if empty(maparg('<F1>', 'n')) | nnoremap <buffer> <F1> :<c-u>DD<CR> | endif
augroup END

If you prefer to stay in Vim for reading DevDocs, install @girishji 's devdocs.vim instead and replace above :DD by :DevdocsFind.

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To look up the current keyword in many configuration files in the terminal as well, have a look at vim-keyword-lookup.