Highlight copied area in Vim - vim

Question

I would like to mimic a nice effect found in the game Vim Adventures: When a yank command is done, I would like the yanked area to be highlighted (let's say in red) for a second to show me that my selection was correct.
For example, yy would highlight the current line in red one second, then I would know what was selected.

Answer 1

For Neovim and Vim
There is a plugin named vim-highlightedyank for this, which works both for Vim and Neovim. Install it and it just works. You can also set the highlight duration by adding the following config:
" set highlight to 1000 ms
let g:highlightedyank_highlight_duration = 1000
Neovim only
If you are using nvim 0.5+, they have made this little feature builtin in this pull request.
No plugin is needed in this case. Just install nvim 0.5+ and add the following config to your init.vim:
augroup highlight_yank
autocmd!
au TextYankPost * silent! lua vim.highlight.on_yank({higroup="IncSearch", timeout=700})
augroup END
See Neovim's documentation on this feature for more.

Answer 2

For Neovim >= 0.7
Neovim includes a function for highlighting a selection on yank, see Neovim Lua documentation.
With Neovim version >= 0.7, you can also Neovim API to define autocommand to use it with TextYankPost event. Add this configuration in your init.lua file :
vim.api.nvim_create_autocmd('TextYankPost', {
group = vim.api.nvim_create_augroup('highlight_yank'),
desc = 'Hightlight selection on yank',
pattern = '*',
callback = function()
vim.highlight.on_yank { higroup = 'IncSearch', timeout = 500 }
end,
})

Answer 3

One vimmer (not me) saw this question and just wrote a plugin for that. Note that this is not a simple solution and probably not for those who prefer to keep vim minimum, but it works like a charm. Also note that this was not meant to be a serious work, thus you can't necessarily seek for a steady support.
plugins to install
kana/vim-operator-user : Lets user define their own operators.
thinca/vim-operator-sequence : "Operator to do two or more operators."
osyo-manga/vim-operator-highlight : the plugin for this.
Use your preferred way to install these plugins.
Settings
Let's say you want to use Meta+y to "yank and highlight". Write the following settings in your .vimrc.
noremap <expr> <Plug>(yank-highlight) operator#sequence#map("y", "\<Plug>(operator-highlight)")
nmap <A-y> <Plug>(yank-highlight)
vmap <A-y> <Plug>(yank-highlight)
Change <A-y> to whatever keymap (just y might not work) you'd like to use : <Leader>y can be nice, for example.
The highlight can automatically be cleared. Write the following:
let g:operator#highlight#clear_time=2.0
This will clear that highlight in about 2 secs. The interval also depends on :set updatetime?, which defaults to 4000(ms), so if this doesn't seem to clear the highlighting, try setting updatetime to a smaller value.

Answer 4

I use the plugin by markonm called hlyank.vim.
I opened the plugin and changed the time as it only blinked the color on the screen so changed it from 200 to 800. In the autoload folder, I opened hlyank.vim and edited the following lines:
call timer_start(800, {-> matchdelete(id, winid)})
else
call timer_start(800, {-> matchdelete(id)})