nvim/after/ftplugin/typescript.lua

vim.o.textwidth = 120

vim.keymap.set("n", "<leader>o", function()
	vim.lsp.buf.execute_command({ command = "_typescript.organizeImports", arguments = { vim.fn.expand("%:p") } })
end, { desc = "Organize imports" })
vim.keymap.set("n", "<leader>s", function()
	require("nvim-quick-switcher").toggle("tsx", "scss")
end, { buffer = true })

local function goToCSSClassDefinition()
	local node = vim.treesitter.get_node()
	if not node then
		return false
	end

	local parent = node:parent()
	if not parent then
		return false
	end

	local grandparent = parent:parent()
	if not grandparent then
		return false
	end

	local className
	if
		node:type() == "string_fragment"
		and grandparent:type() == "jsx_attribute"
		and vim.treesitter.get_node_text(grandparent:named_child(0), 0) == "className"
	then
		className = vim.treesitter.get_node_text(node, 0)
	elseif
		parent:type() == "jsx_attribute" and vim.treesitter.get_node_text(parent:named_child(0), 0) == "className"
	then
		className = vim.treesitter.get_node_text(parent:named_child(1):named_child(0), 0)
	elseif node:type() == "jsx_attribute" and vim.treesitter.get_node_text(node:named_child(0), 0) == "className" then
		className = vim.treesitter.get_node_text(node:named_child(1):named_child(0), 0)
	end

	if className then
		require("nvim-quick-switcher").toggle("tsx", "scss", { only_existing = true })
		local query = vim.treesitter.query.parse("scss", '((class_name) @cn (#eq? @cn "' .. className .. '"))')
		local tree = vim.treesitter.get_node():tree()
		vim.fn.setqflist({})
		local start, _, stop, _ = tree:root():range()
		local anyMatch = false
		for _, match, _ in query:iter_matches(tree:root(), 0, start, stop) do
			anyMatch = true
			for _, node in pairs(match) do
				local row, col = node:start()
				vim.api.nvim_win_set_cursor(0, { row + 1, col })
				vim.fn.setqflist({
					{
						lnum = row + 1,
						col = col + 1,
						text = "class selector: " .. className,
						filename = vim.fn.expand("%:p"),
						bufnr = vim.fn.bufnr("%"),
					},
				}, "a")
			end
		end
		if not anyMatch then
			require("nvim-quick-switcher").toggle("tsx", "scss", { only_existing = true })
		end
		return true
	end
	return false
end

vim.api.nvim_create_autocmd("LspAttach", {
	callback = function()
		vim.keymap.set("n", "gd", function()
			if not goToCSSClassDefinition() then
				require("telescope.builtin").lsp_definitions()
			end
		end, { buffer = true })
	end,
})

vim.o.foldmethod = "expr"
vim.o.foldexpr = "nvim_treesitter#foldexpr()"