fix: use ESM by default in new installations

Gemfile.lock

@@ -99,27 +99,26 @@ GEM
     ast (2.4.2)
     base64 (0.2.0)
     benchmark-ips (2.12.0)
-    bigdecimal (3.1.4)
-    builder (3.2.4)
+    bigdecimal (3.1.8)
+    builder (3.3.0)
     byebug (11.1.3)
     coderay (1.1.3)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     crass (1.0.6)
     date (3.3.3)
     docile (1.4.0)
-    drb (2.2.0)
-      ruby2_keywords
-    dry-cli (1.0.0)
-    erubi (1.12.0)
+    drb (2.2.1)
+    dry-cli (1.1.0)
+    erubi (1.13.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
-    i18n (1.14.1)
+    i18n (1.14.5)
       concurrent-ruby (~> 1.0)
-    io-console (0.6.0)
-    irb (1.9.0)
-      rdoc
-      reline (>= 0.3.8)
+    io-console (0.7.2)
+    irb (1.14.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
     json (2.6.3)
     loofah (2.22.0)
       crass (~> 1.0.2)
@@ -135,8 +134,8 @@ GEM
     marcel (1.0.2)
     method_source (1.0.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.5)
-    minitest (5.20.0)
+    mini_portile2 (2.8.7)
+    minitest (5.24.1)
     minitest-reporters (1.6.1)
       ansi
       builder
@@ -154,7 +153,7 @@ GEM
     net-smtp (0.4.0)
       net-protocol
     nio4r (2.5.9)
-    nokogiri (1.15.4)
+    nokogiri (1.16.6)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     parallel (1.23.0)
@@ -167,10 +166,10 @@ GEM
     pry-byebug (3.10.1)
       byebug (~> 11.0)
       pry (>= 0.13, < 0.15)
-    psych (5.1.1.1)
+    psych (5.1.2)
       stringio
-    racc (1.7.3)
-    rack (3.0.8)
+    racc (1.8.0)
+    rack (3.1.7)
     rack-proxy (0.7.7)
       rack
     rack-session (2.0.0)
@@ -210,11 +209,11 @@ GEM
       thor (~> 1.0, >= 1.2.2)
       zeitwerk (~> 2.6)
     rainbow (3.1.1)
-    rake (13.1.0)
-    rdoc (6.6.0)
+    rake (13.2.1)
+    rdoc (6.7.0)
       psych (>= 4.0.0)
     regexp_parser (2.8.1)
-    reline (0.4.0)
+    reline (0.5.9)
       io-console (~> 0.5)
     rexml (3.2.6)
     rubocop (1.24.1)
@@ -234,15 +233,14 @@ GEM
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
     ruby-progressbar (1.13.0)
-    ruby2_keywords (0.0.5)
     simplecov (0.17.1)
       docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
     spring (2.1.1)
-    stringio (3.0.9)
-    thor (1.3.0)
+    stringio (3.1.1)
+    thor (1.3.1)
     timeout (0.4.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
@@ -251,7 +249,7 @@ GEM
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.6.12)
+    zeitwerk (2.6.16)
 
 PLATFORMS
   ruby

docs/src/guide/troubleshooting.md

@@ -90,6 +90,13 @@ Use the `~/` alias to the <kbd>[sourceCodeDir]</kbd> to disambiguate the referen
 <%= vite_stylesheet_tag '~/style.css' unless ViteRuby.instance.dev_server_running? %>
 ```
 
+### The CJS build of Vite's Node API is deprecated
+
+Please refer to [Vite's troubleshooting guide](https://vitejs.dev/guide/troubleshooting.html#vite-cjs-node-api-deprecated).
+
+You might need to add `"type": "module"` to your `package.json`, or rename
+`vite.config.ts` to `vite.config.mjs`.
+
 ## HMR Issues
 
 ### Hot Module Refresh does not work for React

examples/rails/example_engine/package.json

@@ -2,5 +2,6 @@
   "devDependencies": {
     "vite": "^4.3.0",
     "vite-plugin-ruby": "^3.2.0"
-  }
+  },
+  "type": "module"
 }

test/engine_rake_tasks_test.rb

@@ -38,7 +38,7 @@ def test_rake_tasks
     app_frontend_dir.join('ssr/ssr.js').write(SSR_ENTRYPOINT)
 
     within_mounted_app { `bundle exec rake app:vite:build_all` }
-    assert_path_exists app_ssr_dir.join('ssr.mjs')
+    assert_path_exists app_ssr_dir.join('ssr.js')
     refute_path_exists app_ssr_dir.join('.vite/manifest.json')
     refute_path_exists app_ssr_dir.join('.vite/manifest-assets.json')
 
@@ -89,7 +89,7 @@ def test_cli_commands
       }
 
       FileUtils.mkdir_p(app_ssr_dir.to_s)
-      ssr_path = app_ssr_dir.join('ssr.mjs')
+      ssr_path = app_ssr_dir.join('ssr.js')
       ssr_path.write('')
       stub_kernel_exec('node', ssr_path.to_s) {
         ViteRuby::CLI::SSR.new.call(mode: ViteRuby.mode)

test/mounted_app/test/dummy/package.json

@@ -1,6 +1,7 @@
 {
   "private": true,
   "license": "MIT",
+  "type": "module",
   "devDependencies": {
     "ci": "^2.0.0",
     "ni": "^0.0.2",

vite_ruby/lib/vite_ruby/cli/install.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'stringio'
+require 'json'
 
 class ViteRuby::CLI::Install < Dry::CLI::Command
   desc 'Performs the initial configuration setup to get started with Vite Ruby.'
@@ -79,7 +80,19 @@ def create_configuration_files
   # Internal: Installs vite and vite-plugin-ruby at the project level.
   def install_js_dependencies
     package_json = root.join('package.json')
-    write(package_json, '{}') unless package_json.exist?
+    unless package_json.exist?
+      write(package.json, <<~JSON)
+        {
+          "private": true,
+          "type": "module"
+        }
+      JSON
+    end
+
+    if (JSON.parse(package_json.read)['type'] != 'module' rescue nil)
+      FileUtils.mv root.join('vite.config.ts'), root.join('vite.config.mts'), force: true, verbose: true
+    end
+
     deps = js_dependencies.join(' ')
     run_with_capture("#{ npm_install } -D #{ deps }", stdin_data: "\n")
   end

vite_ruby/lib/vite_ruby/config.rb

@@ -197,6 +197,7 @@ def config_from_file(path, mode:)
     vite.config.js
     vite.config.mjs
     vite.config.ts
+    vite.config.mts
     windi.config.ts
     yarn.lock
   ].freeze