Re: Call for volunteers: add tree-sitter support to major modes

[Yuan Fu]

> 
> +
> +(defun js--treesit-enable ()
> +  (unless (and (treesit-can-enable-p)
> +               (treesit-language-available-p 'javascript))
> +    (error "Tree sitter isn't available"))
> 
> I don't think we should error here, I'd displaying a message instead.

Actually we should also fall back to non-tree-sitter if the conditions aren’t 
met.

Yuan