fixed nvim tree setup

nvim/.config/nvim/lua/user/nvim-tree.lua

@@ -1,18 +1,18 @@
 -- following options are the default
 -- each of these are documented in `:help nvim-tree.OPTION_NAME`
-local status_ok, nvim_tree = pcall(require, "nvim-tree")
-if not status_ok then
-    return
-end
 
-local config_status_ok, nvim_tree_config = pcall(require, "nvim-tree.config")
-if not config_status_ok then
-    return
-end
+local nvimtree = require("nvim-tree")
 
-local tree_cb = nvim_tree_config.nvim_tree_callback
+nvimtree.setup {
+    on_attach = function(bufnr)
+        local api = require("nvim-tree.api")
 
-nvim_tree.setup {
+        local function opts(desc)
+            return { desc = "nvim-tree: " .. desc, buffer = bufnr, noremap = true, silent = true, nowait = true }
+        end
+        api.config.mappings.default_on_attach(bufnr)
+        vim.keymap.set("n", "<space>", api.node.open.edit, opts("Open"))
+    end,
     renderer = {
         icons = {
             webdev_colors = true,
@@ -86,18 +86,10 @@ nvim_tree.setup {
     },
     view = {
         width = 30,
-        hide_root_folder = false,
         side = "left",
-        mappings = {
-            custom_only = false,
-            list = {
-                { key = { "l", "<CR>", "o" }, cb = tree_cb "edit" },
-                { key = "h", cb = tree_cb "close_node" },
-                { key = "v", cb = tree_cb "vsplit" },
-            },
+        float = {
+            quit_on_focus_loss = true,
         },
-        number = false,
-        relativenumber = false,
     },
     trash = {
         cmd = "trash",