Added babel to showcase project.

showcase/.eslintignore

@@ -0,0 +1,3 @@
+webpack.*.js
+webpack.*.cjs
+**/prism.js

showcase/.eslintrc.json

@@ -0,0 +1,36 @@
+{
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:import/recommended"
+    ],
+    "parserOptions": {
+        "ecmaVersion": "latest",
+        "sourceType": "module"
+    },
+    "rules": {
+        "indent": [
+            "error",
+            4
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "double"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ],
+        "import/extensions": [
+            "error",
+            "ignorePackages"
+        ]
+    }
+}

showcase/babel.config.json

@@ -0,0 +1,4 @@
+{
+    "presets": [],
+    "plugins": []
+}

showcase/package.json

@@ -12,8 +12,15 @@
   "author": "",
   "license": "ISC",
   "devDependencies": {
+    "@babel/core": "^7.17.9",
+    "@babel/eslint-parser": "^7.17.0",
+    "@babel/preset-env": "^7.16.11",
+    "babel-loader": "^8.2.4",
     "copy-webpack-plugin": "^10.2.4",
     "css-loader": "^6.7.1",
+    "eslint": "^8.13.0",
+    "eslint-plugin-import": "^2.26.0",
+    "eslint-webpack-plugin": "^3.1.1",
     "html-loader": "^3.1.0",
     "html-webpack-plugin": "^5.5.0",
     "style-loader": "^3.3.1",

showcase/webpack.common.cjs

@@ -1,6 +1,7 @@
 const path = require("path");
 const HtmlWebpackPlugin = require("html-webpack-plugin");
 const CopyPlugin = require("copy-webpack-plugin");
+const ESLintPlugin = require("eslint-webpack-plugin");
 
 module.exports = {
     entry: {
@@ -33,6 +34,7 @@ module.exports = {
         path: path.resolve("./dist")
     },
     plugins: [
+        new ESLintPlugin(),
         new HtmlWebpackPlugin({
             template: path.resolve("./src/index.html"),
         }),