Add signature support to javascript projects.

lua/lsp/typescript-ls.lua

@@ -1,6 +1,20 @@
 require'lspconfig'.tsserver.setup{
+    on_attach = function(client, bufnr)
+    require "lsp_signature".on_attach({
+        bind = false,
+        -- floating_window = true,
+        --hint_enable = true,
+        fix_pos = true,
+        use_lspsaga = true,
+        --handler_opts = {
+        --  border = "single"   -- double, single, shadow, none
+        --},
+      })
+    end,
     cmd = {DATA_PATH .. "/lspinstall/typescript/node_modules/.bin/typescript-language-server", "--stdio"},
     filetypes = { "javascript", "javascriptreact", "javascript.jsx", "typescript", "typescriptreact", "typescript.tsx" },
     root_dir = require('lspconfig/util').root_pattern("package.json", "tsconfig.json", "jsconfig.json", ".git")
 }
 
+local saga = require 'lspsaga'
+saga.init_lsp_saga()