evil-vimish-fold based on syntax

Question

evil-vimish-fold is really great for custom folds. However it's not clear to me how you would accomplish syntax based folds.

Does evil-vimish-fold work with JavaScript mode? Can I set evil-vimish-fold's foldmethod

The following is what I would do in vim ftplugin/javascript.vim

syntax region foldBraces start=/{/ end=/}/ transparent fold keepend extend
setlocal foldmethod=syntax
setlocal foldlevel=99

Answer 1

This answer does not address evil-vimish-mode. Instead, if you're agnostic about which particular package does the folding for you, you can try the built-in Hideshow mode (manual, wiki page).

From the manual:

Hideshow mode is a buffer-local minor mode that allows you to selectively display portions of a program, which are referred to as blocks. Type M-x hs-minor-mode to toggle this minor mode (see Minor Modes).

When you use Hideshow mode to hide a block, the block disappears from the screen, to be replaced by an ellipsis (three periods in a row). Just what constitutes a block depends on the major mode. In C mode and related modes, blocks are delimited by braces...

You can enable it with:

(add-hook 'js-mode-hook #'hs-minor-mode)

It's got some odd default keybindings (C-c @ ...), so you'll probably want to rebind them to something more comfortable.

Here's an old blog post from Emacs-Fu that describes Hideshow. For an example with JavaScript, see this old blog post where it discusses "Code Folding."