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diff --git a/nvim/lsp/ts_ls.lua b/nvim/lsp/ts_ls.lua
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+---@brief
+---
+--- https://github.com/typescript-language-server/typescript-language-server
+---
+--- `ts_ls`, aka `typescript-language-server`, is a Language Server Protocol implementation for TypeScript wrapping `tsserver`. Note that `ts_ls` is not `tsserver`.
+---
+--- `typescript-language-server` depends on `typescript`. Both packages can be installed via `npm`:
+--- ```sh
+--- npm install -g typescript typescript-language-server
+--- ```
+---
+--- To configure typescript language server, add a
+--- [`tsconfig.json`](https://www.typescriptlang.org/docs/handbook/tsconfig-json.html) or
+--- [`jsconfig.json`](https://code.visualstudio.com/docs/languages/jsconfig) to the root of your
+--- project.
+---
+--- Here's an example that disables type checking in JavaScript files.
+---
+--- ```json
+--- {
+---   "compilerOptions": {
+---     "module": "commonjs",
+---     "target": "es6",
+---     "checkJs": false
+---   },
+---   "exclude": [
+---     "node_modules"
+---   ]
+--- }
+--- ```
+---
+--- Use the `:LspTypescriptSourceAction` command to see "whole file" ("source") code-actions such as:
+--- - organize imports
+--- - remove unused code
+
+return {
+  init_options = { hostInfo = 'neovim' },
+  cmd = { 'typescript-language-server', '--stdio' },
+  filetypes = {
+    'javascript',
+    'javascriptreact',
+    'javascript.jsx',
+    'typescript',
+    'typescriptreact',
+    'typescript.tsx',
+  },
+  root_markers = { 'tsconfig.json', 'jsconfig.json', 'package.json', '.git' },
+  handlers = {
+    -- handle rename request for certain code actions like extracting functions / types
+    ['_typescript.rename'] = function(_, result, ctx)
+      local client = assert(vim.lsp.get_client_by_id(ctx.client_id))
+      vim.lsp.util.show_document({
+        uri = result.textDocument.uri,
+        range = {
+          start = result.position,
+          ['end'] = result.position,
+        },
+      }, client.offset_encoding)
+      vim.lsp.buf.rename()
+      return vim.NIL
+    end,
+  },
+  commands = {
+    ['editor.action.showReferences'] = function(command, ctx)
+      local client = assert(vim.lsp.get_client_by_id(ctx.client_id))
+      local file_uri, position, references = unpack(command.arguments)
+
+      local quickfix_items = vim.lsp.util.locations_to_items(references, client.offset_encoding)
+      vim.fn.setqflist({}, ' ', {
+        title = command.title,
+        items = quickfix_items,
+        context = {
+          command = command,
+          bufnr = ctx.bufnr,
+        },
+      })
+
+      vim.lsp.util.show_document({
+        uri = file_uri,
+        range = {
+          start = position,
+          ['end'] = position,
+        },
+      }, client.offset_encoding)
+
+      vim.cmd('botright copen')
+    end,
+  },
+  on_attach = function(client, bufnr)
+    -- ts_ls provides `source.*` code actions that apply to the whole file. These only appear in
+    -- `vim.lsp.buf.code_action()` if specified in `context.only`.
+    vim.api.nvim_buf_create_user_command(bufnr, 'LspTypescriptSourceAction', function()
+      local source_actions = vim.tbl_filter(function(action)
+        return vim.startswith(action, 'source.')
+      end, client.server_capabilities.codeActionProvider.codeActionKinds)
+
+      vim.lsp.buf.code_action({
+        context = {
+          only = source_actions,
+        },
+      })
+    end, {})
+  end,
+}