add react

app/javascript/application.ts

@@ -1 +0,0 @@
-console.log('Hello, Typescript!')

app/javascript/application.tsx

@@ -0,0 +1,14 @@
+import React from 'react';
+import { createRoot } from 'react-dom/client';
+
+const container = document.getElementById('app');
+
+const App = () => {
+  return (<div>Hello, Rails 7!</div>)
+}
+
+if (container) {
+  const root = createRoot(container); // createRoot(container!) if you use TypeScript
+
+  root.render(<App />);
+}

app/views/entrypoint/index.html.erb

@@ -1,2 +1 @@
-<h1>Entrypoint#index</h1>
+<div id="app"></div>
-<p>Find me in app/views/entrypoint/index.html.erb</p>

package.json

@@ -2,9 +2,15 @@
   "name": "app",
   "private": "true",
   "dependencies": {
-    "esbuild": "^0.14.49"
+    "esbuild": "^0.14.49",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "scripts": {
     "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=assets"
+  },
+  "devDependencies": {
+    "@types/react": "^18.0.15",
+    "@types/react-dom": "^18.0.6"
   }
 }

yarn.lock

@@ -2,6 +2,37 @@
 # yarn lockfile v1
 
 
+"@types/prop-types@*":
+  version "15.7.5"
+  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.7.5.tgz#5f19d2b85a98e9558036f6a3cacc8819420f05cf"
+  integrity sha512-JCB8C6SnDoQf0cNycqd/35A7MjcnK+ZTqE7judS6o7utxUCg6imJg3QK2qzHKszlTjcj2cn+NwMB2i96ubpj7w==
+
+"@types/react-dom@^18.0.6":
+  version "18.0.6"
+  resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-18.0.6.tgz#36652900024842b74607a17786b6662dd1e103a1"
+  integrity sha512-/5OFZgfIPSwy+YuIBP/FgJnQnsxhZhjjrnxudMddeblOouIodEQ75X14Rr4wGSG/bknL+Omy9iWlLo1u/9GzAA==
+  dependencies:
+    "@types/react" "*"
+
+"@types/react@*", "@types/react@^18.0.15":
+  version "18.0.15"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-18.0.15.tgz#d355644c26832dc27f3e6cbf0c4f4603fc4ab7fe"
+  integrity sha512-iz3BtLuIYH1uWdsv6wXYdhozhqj20oD4/Hk2DNXIn1kFsmp9x8d9QB6FnPhfkbhd2PgEONt9Q1x/ebkwjfFLow==
+  dependencies:
+    "@types/prop-types" "*"
+    "@types/scheduler" "*"
+    csstype "^3.0.2"
+
+"@types/scheduler@*":
+  version "0.16.2"
+  resolved "https://registry.yarnpkg.com/@types/scheduler/-/scheduler-0.16.2.tgz#1a62f89525723dde24ba1b01b092bf5df8ad4d39"
+  integrity sha512-hppQEBDmlwhFAXKJX2KnWLYu5yMfi91yazPb2l+lbJiwW+wdo1gNeRA+3RgNSO39WYX2euey41KEwnqesU2Jew==
+
+csstype@^3.0.2:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/csstype/-/csstype-3.1.0.tgz#4ddcac3718d787cf9df0d1b7d15033925c8f29f2"
+  integrity sha512-uX1KG+x9h5hIJsaKR9xHUeUraxf8IODOwq9JLNPq6BwB04a/xgpq3rcx47l5BZu5zBPlgD342tdke3Hom/nJRA==
+
 esbuild-android-64@0.14.49:
   version "0.14.49"
   resolved "https://registry.yarnpkg.com/esbuild-android-64/-/esbuild-android-64-0.14.49.tgz#9e4682c36dcf6e7b71b73d2a3723a96e0fdc5054"
@@ -127,3 +158,37 @@ esbuild@^0.14.49:
     esbuild-windows-32 "0.14.49"
     esbuild-windows-64 "0.14.49"
     esbuild-windows-arm64 "0.14.49"
+
+"js-tokens@^3.0.0 || ^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
+  integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
+
+loose-envify@^1.1.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
+  integrity sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==
+  dependencies:
+    js-tokens "^3.0.0 || ^4.0.0"
+
+react-dom@^18.2.0:
+  version "18.2.0"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-18.2.0.tgz#22aaf38708db2674ed9ada224ca4aa708d821e3d"
+  integrity sha512-6IMTriUmvsjHUjNtEDudZfuDQUoWXVxKHhlEGSk81n4YFS+r/Kl99wXiwlVXtPBtJenozv2P+hxDsw9eA7Xo6g==
+  dependencies:
+    loose-envify "^1.1.0"
+    scheduler "^0.23.0"
+
+react@^18.2.0:
+  version "18.2.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-18.2.0.tgz#555bd98592883255fa00de14f1151a917b5d77d5"
+  integrity sha512-/3IjMdb2L9QbBdWiW5e3P2/npwMBaU9mHCSCUzNln0ZCYbcfTsGbTJrU/kGemdH2IWmB2ioZ+zkxtmq6g09fGQ==
+  dependencies:
+    loose-envify "^1.1.0"
+
+scheduler@^0.23.0:
+  version "0.23.0"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.23.0.tgz#ba8041afc3d30eb206a487b6b384002e4e61fdfe"
+  integrity sha512-CtuThmgHNg7zIZWAXi3AsyIzA3n4xx7aNyjwC2VJldO2LMVDhFK+63xGqq6CsJH4rTAt6/M+N4GhZiDYPx9eUw==
+  dependencies:
+    loose-envify "^1.1.0"