Add an example JS file using jQuery

Gemfile

@@ -36,6 +36,8 @@ gem 'jbuilder', '~> 2.5'
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.1.0', require: false
 
+gem 'jquery-rails'
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]

Gemfile.lock

@@ -85,6 +85,10 @@ GEM
     jbuilder (2.8.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
+    jquery-rails (4.3.3)
+      rails-dom-testing (>= 1, < 3)
+      railties (>= 4.2.0)
+      thor (>= 0.14, < 2.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -200,6 +204,7 @@ DEPENDENCIES
   chromedriver-helper
   coffee-rails (~> 4.2)
   jbuilder (~> 2.5)
+  jquery-rails
   listen (>= 3.0.5, < 3.2)
   puma (~> 3.11)
   rails (~> 5.2.2)

app/assets/javascripts/application.js

@@ -13,4 +13,5 @@
 //= require rails-ujs
 //= require activestorage
 //= require turbolinks
+//= require jquery
 //= require_tree .

app/assets/javascripts/greeting.js

@@ -0,0 +1,3 @@
+$(function() {
+  $('h1').text('Hello from Sprockets!')
+})