my-nvim-setup/lua/nvim-lspconfig/lua.lua

vim.cmd [[packadd nvim-lspconfig]]
vim.cmd [[packadd nvim-compe]]

local function buf_set_keymap(...)
    vim.api.nvim_buf_set_keymap(bufnr, ...)
end
local function buf_set_option(...)
    vim.api.nvim_buf_set_option(bufnr, ...)
end

buf_set_option("omnifunc", "v:lua.vim.lsp.omnifunc")

-- Mappings.
local opts = {noremap = true, silent = true}
buf_set_keymap("n", "gD", "<Cmd>lua vim.lsp.buf.declaration()<CR>", opts)
buf_set_keymap("n", "gd", "<Cmd>lua vim.lsp.buf.definition()<CR>", opts)
buf_set_keymap("n", "K", "<Cmd>lua vim.lsp.buf.hover()<CR>", opts)
buf_set_keymap("n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
buf_set_keymap("n", "<C-k>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)
buf_set_keymap("n", "<space>wa", "<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>", opts)
buf_set_keymap("n", "<space>wr", "<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>", opts)
buf_set_keymap("n", "<space>wl", "<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>", opts)
buf_set_keymap("n", "<space>D", "<cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
buf_set_keymap("n", "<space>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
buf_set_keymap("n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)
buf_set_keymap("n", "<space>e", "<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>", opts)
buf_set_keymap("n", "[d", "<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>", opts)
buf_set_keymap("n", "]d", "<cmd>lua vim.lsp.diagnostic.goto_next()<CR>", opts)
buf_set_keymap("n", "<space>q", "<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>", opts)

--  lsp for html , css and js/ts
require "lspconfig".tsserver.setup {}
require "lspconfig".cssls.setup {}
require "lspconfig".html.setup {}