diff --git a/init.lua b/init.lua
index 37240ae8..45e8aea7 100644
--- a/init.lua
+++ b/init.lua
@@ -102,7 +102,7 @@ vim.g.have_nerd_font = true
 vim.opt.number = true
 -- You can also add relative line numbers, to help with jumping.
 --  Experiment for yourself to see if you like it!
--- vim.opt.relativenumber = true
+vim.opt.relativenumber = true
 
 -- Enable mouse mode, can be useful for resizing splits for example!
 vim.opt.mouse = 'a'
@@ -631,7 +631,7 @@ require('lazy').setup({
         --    https://github.com/pmizio/typescript-tools.nvim
         --
         -- But for many setups, the LSP (`ts_ls`) will work just fine
-        -- ts_ls = {},
+        ts_ls = {},
         --
 
         lua_ls = {
@@ -666,6 +666,7 @@ require('lazy').setup({
       local ensure_installed = vim.tbl_keys(servers or {})
       vim.list_extend(ensure_installed, {
         'stylua', -- Used to format Lua code
+        'prettier', -- JS/TS/Markdown 等文件格式化工具
       })
       require('mason-tool-installer').setup { ensure_installed = ensure_installed }
 
@@ -718,6 +719,7 @@ require('lazy').setup({
       end,
       formatters_by_ft = {
         lua = { 'stylua' },
+        markdown = { 'prettier' },
         -- Conform can also run multiple formatters sequentially
         -- python = { "isort", "black" },
         --
@@ -908,7 +910,7 @@ require('lazy').setup({
     main = 'nvim-treesitter.configs', -- Sets main module to use for opts
     -- [[ Configure Treesitter ]] See `:help nvim-treesitter`
     opts = {
-      ensure_installed = { 'bash', 'c', 'diff', 'html', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' },
+      ensure_installed = { 'javascript', 'bash', 'c', 'diff', 'html', 'lua', 'luadoc', 'markdown', 'markdown_inline', 'query', 'vim', 'vimdoc' },
       -- Autoinstall languages that are not installed
       auto_install = true,
       highlight = {