add bootstrap

app/assets/stylesheets/custom.scss

+// @import "bootstrap";
+
+.name {
+  font-size: 100px;
+}
\ No newline at end of file

app/assets/stylesheets/home.scss

+// Place all the styles related to the Home controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: https://sass-lang.com/

app/controllers/home_controller.rb

+class HomeController < ApplicationController
+  def index
+  end
+end

app/helpers/home_helper.rb

+module HomeHelper
+end

app/javascript/packs/application.js

@@ -11,3 +11,7 @@ import "channels"
 Rails.start()
 Turbolinks.start()
 ActiveStorage.start()
+
+import "bootstrap"
+window.bootstrap = require("bootstrap");
+import "../stylesheets/application.scss";

app/javascript/stylesheets/application.scss

+@import "bootstrap";

app/views/home/index.html.erb

+<nav class="navbar navbar-expand-lg navbar-light bg-light">
+    <div class="container-fluid">
+        <a class="navbar-brand" href="#">Navbar</a>
+        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
+            <span class="navbar-toggler-icon"></span>
+        </button>
+        <div class="collapse navbar-collapse" id="navbarSupportedContent">
+            <ul class="navbar-nav me-auto mb-2 mb-lg-0">
+                <li class="nav-item">
+                    <a class="nav-link active" aria-current="page" href="#">Home</a>
+                </li>
+                <li class="nav-item">
+                    <a class="nav-link" href="#">Link</a>
+                </li>
+                <li class="nav-item dropdown">
+                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
+                        Dropdown
+                    </a>
+                    <ul class="dropdown-menu" aria-labelledby="navbarDropdown">
+                        <li><a class="dropdown-item" href="#">Action</a></li>
+                        <li><a class="dropdown-item" href="#">Another action</a></li>
+                        <li>
+                            <hr class="dropdown-divider">
+                        </li>
+                        <li><a class="dropdown-item" href="#">Something else here</a></li>
+                    </ul>
+                </li>
+                <li class="nav-item">
+                    <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
+                </li>
+            </ul>
+            <form class="d-flex">
+                <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
+                <button class="btn btn-outline-success" type="submit">Search</button>
+            </form>
+        </div>
+    </div>
+</nav>
+
+<h1>Home#index</h1>
+<p>Find me in app/views/home/index.html.erb</p>
+
+<h1 class="name">HA</h1>

config/routes.rb

 Rails.application.routes.draw do
-  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
+  root 'home#index'
 end

config/webpack/environment.js

 const { environment } = require('@rails/webpacker')
 
+const webpack = require('webpack')
+environment.plugins.prepend('Provide',
+new webpack.ProvidePlugin({
+$: 'jquery/src/jquery',
+jQuery: 'jquery/src/jquery'
+})
+)
+
 module.exports = environment

package.json

@@ -2,10 +2,13 @@
   "name": "ven-job",
   "private": true,
   "dependencies": {
+    "@popperjs/core": "^2.9.2",
     "@rails/actioncable": "^6.0.0",
     "@rails/activestorage": "^6.0.0",
     "@rails/ujs": "^6.0.0",
     "@rails/webpacker": "5.4.0",
+    "bootstrap": "^5.0.0-beta3",
+    "jquery": "^3.6.0",
     "turbolinks": "^5.2.0",
     "webpack": "^4.46.0",
     "webpack-cli": "^3.3.12"

test/controllers/home_controller_test.rb

+require "test_helper"
+
+class HomeControllerTest < ActionDispatch::IntegrationTest
+  test "should get index" do
+    get home_index_url
+    assert_response :success
+  end
+end

yarn.lock

@@ -893,6 +893,11 @@
     mkdirp "^1.0.4"
     rimraf "^3.0.2"
 
+"@popperjs/core@^2.9.2":
+  version "2.9.2"
+  resolved "https://registry.yarnpkg.com/@popperjs/core/-/core-2.9.2.tgz#adea7b6953cbb34651766b0548468e743c6a2353"
+  integrity sha512-VZMYa7+fXHdwIq1TDhSXoVmSPEGM/aa+6Aiq3nVVJ9bXr24zScr+NlKFKC3iPljA7ho/GAZr+d2jOf5GIRC30Q==
+
 "@rails/actioncable@^6.0.0":
   version "6.1.4"
   resolved "https://registry.yarnpkg.com/@rails/actioncable/-/actioncable-6.1.4.tgz#c3c5a9f8302c429af9722b6c50ab48049016d2a3"
@@ -1491,6 +1496,11 @@ boolbase@^1.0.0, boolbase@~1.0.0:
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha1-aN/1++YMUes3cl6p4+0xDcwed24=
 
+bootstrap@^5.0.0-beta3:
+  version "5.0.0-beta3"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-5.0.0-beta3.tgz#c959f61fbd03667a1b158f763856994859d7a465"
+  integrity sha512-0urccjfIOzhrb9qJysN8XW/DRw6rg3zH7qLeKIp4Zyl8+Ens4JWB0NC0cB5AhnSFPd2tftRggjwCMxablo6Tpg==
+
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -3733,6 +3743,11 @@ jest-worker@^26.5.0:
     merge-stream "^2.0.0"
     supports-color "^7.0.0"
 
+jquery@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/jquery/-/jquery-3.6.0.tgz#c72a09f15c1bdce142f49dbf1170bdf8adac2470"
+  integrity sha512-JVzAR/AjBvVt2BmYhxRCSYysDsPcssdmTFnzyLEts9qNwmjmu4JTAMYubEfwVOSwpQ1I1sKKFcxhZCI2buerfw==
+
 js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"