fix(webpack): duplicated jquery instance

Author: ldlsegovia

package.json

@@ -25,6 +25,7 @@
   },
   "dependencies": {
     "jquery-datetimepicker": "^2.5.21",
+    "script-loader": "^0.7.2",
     "select2": "^4.0.13"
   }
 }

spec/dummy/app/javascript/packs/active_admin.js

@@ -1,6 +1,7 @@
 // Load Active Admin's styles into Webpacker,
 // see `active_admin.scss` for customization.
-import "../stylesheets/active_admin";
 
+import 'script-loader!jquery/dist/jquery.min'
+import "../stylesheets/active_admin";
 import "@activeadmin/activeadmin";
 import "../../../../../app/javascript/activeadmin_addons/all";

spec/dummy/config/webpack/environment.js

@@ -1,5 +1,6 @@
 const { environment } = require('@rails/webpacker')
-const jquery = require('./plugins/jquery')
-
-environment.plugins.prepend('jquery', jquery)
-module.exports = environment
+environment.config.set('externals', {
+    $: 'jquery',
+    jquery: 'jQuery',
+});
+module.exports = environment;

yarn.lock

@@ -1133,6 +1133,11 @@ php-date-formatter@^1.3.4:
   resolved "https://registry.yarnpkg.com/php-date-formatter/-/php-date-formatter-1.3.6.tgz#6d67359da890c742005fa89d20be3ded31cc1d2a"
   integrity sha512-/CKsZYmAwXeNh8KpD/CF9hcJDZNhdb2ICN8+qgqOt5sUu9liZIxZ1R284TNj5MtPt8RjG5X0xn6WSqL0kcKMBg==
 
+raw-loader@~0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/raw-loader/-/raw-loader-0.5.1.tgz#0c3d0beaed8a01c966d9787bf778281252a979aa"
+  integrity sha1-DD0L6u2KAclm2Xh793goElKpeao=
+
 regenerate-unicode-properties@^8.2.0:
   version "8.2.0"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-8.2.0.tgz#e5de7111d655e7ba60c057dbe9ff37c87e65cdec"
@@ -1247,6 +1252,13 @@ safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
   integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
 
+script-loader@^0.7.2:
+  version "0.7.2"
+  resolved "https://registry.yarnpkg.com/script-loader/-/script-loader-0.7.2.tgz#2016db6f86f25f5cf56da38915d83378bb166ba7"
+  integrity sha512-UMNLEvgOAQuzK8ji8qIscM3GIrRCWN6MmMXGD4SD5l6cSycgGsCo0tX5xRnfQcoghqct0tjHjcykgI1PyBE2aA==
+  dependencies:
+    raw-loader "~0.5.1"
+
 select2@^4.0.13:
   version "4.0.13"
   resolved "https://registry.yarnpkg.com/select2/-/select2-4.0.13.tgz#0dbe377df3f96167c4c1626033e924372d8ef44d"