How to load UltiSnips file types by default in JS files?

Question

I know that doing :UltiSnipsAddFiletypes javascript-node in vim console works. But I need this load automatically whenever I open a javascript file. Regardless documentation, I understood that I should create a ftplugin/javascript.vim file and put :UltiSnipsAddFiletypes javascript-node in first line. The thing is those snippets are not loaded.

So, how can make this works please?

Answer 1

You can use an autocmd in your .vimrc:

autocmd FileType javascript UltiSnipsAddFiletypes javascript-node

Answer 2

Just to add on to @tckmn 's answer, I used this for multiple filetypes, keeping in mind that UltiSnipsAddFiletypes uses . as a delimiter:

autocmd FileType javascript,javascriptreact,typescript,typescriptreact
  \ UltiSnipsAddFiletypes javascript.javascriptreact.typescript.typescriptreact