webpack config + babel-loader

gulpfile.js

@@ -1,8 +1,8 @@
 const pkg = require('./package.json')
 const path = require('path')
 const glob = require('glob')
-const colors = require('colors')
 const yargs = require('yargs')
+const colors = require('colors')
 const webpack = require('webpack-stream')
 const { runQunitPuppeteer, printResultSummary, printFailedTests } = require('node-qunit-puppeteer')
 
@@ -10,7 +10,6 @@ const gulp = require('gulp')
 const tap = require('gulp-tap')
 const zip = require('gulp-zip')
 const sass = require('gulp-sass')
-const babel = require('gulp-babel')
 const header = require('gulp-header')
 const eslint = require('gulp-eslint')
 const uglify = require('gulp-uglify')
@@ -37,8 +36,7 @@ const swallowError = function(error) {
 }
 
 gulp.task('js', () => gulp.src(['./js/index.js'])
-        .pipe(babel({ presets: ['@babel/preset-env'] }))
+        .pipe(webpack(require('./webpack.config.js')))
-        .pipe(webpack({ mode: 'production' }))
         .on('error', swallowError)
         .pipe(header(license, {pkg: pkg}))
         .pipe(rename('reveal.min.js'))
@@ -55,9 +53,7 @@ gulp.task('css-core', gulp.series(
         .pipe(autoprefixer())
         .pipe(gulp.dest('./dist')),
     () => gulp.src(['dist/reveal.css'])
-        .pipe(minify({
+        .pipe(minify({compatibility: 'ie9'}))
-            compatibility: 'ie9'
-        }))
         .pipe(header(license, {pkg: pkg}))
         .pipe(gulp.dest('./dist'))
 

package-lock.json

@@ -1651,6 +1651,52 @@
         "resolve": "^1.12.0"
       }
     },
+    "babel-loader": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/babel-loader/-/babel-loader-8.1.0.tgz",
+      "integrity": "sha512-7q7nC1tYOrqvUrN3LQK4GwSk/TQorZSOlO9C+RZDZpODgyN4ZlCqE5q9cDsyWOliN+aU9B4JX01xK9eJXowJLw==",
+      "dev": true,
+      "requires": {
+        "find-cache-dir": "^2.1.0",
+        "loader-utils": "^1.4.0",
+        "mkdirp": "^0.5.3",
+        "pify": "^4.0.1",
+        "schema-utils": "^2.6.5"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.5",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+          "dev": true
+        },
+        "mkdirp": {
+          "version": "0.5.4",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.4.tgz",
+          "integrity": "sha512-iG9AK/dJLtJ0XNgTuDbSyNS3zECqDlAhnQW4CsNxBG3LQJBbHmRX1egw39DmtOdCAqY+dKXV+sgPgilNWUKMVw==",
+          "dev": true,
+          "requires": {
+            "minimist": "^1.2.5"
+          }
+        },
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+          "dev": true
+        },
+        "schema-utils": {
+          "version": "2.6.5",
+          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-2.6.5.tgz",
+          "integrity": "sha512-5KXuwKziQrTVHh8j/Uxz+QUbxkaLW9X/86NBlx/gnKgtsZA2GIVMUn17qWhRFwF8jdYb3Dig5hRO/W5mZqy6SQ==",
+          "dev": true,
+          "requires": {
+            "ajv": "^6.12.0",
+            "ajv-keywords": "^3.4.1"
+          }
+        }
+      }
+    },
     "babel-plugin-dynamic-import-node": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-dynamic-import-node/-/babel-plugin-dynamic-import-node-2.3.0.tgz",

package.json

@@ -27,6 +27,7 @@
     "@babel/core": "^7.8.7",
     "@babel/preset-env": "^7.8.7",
     "babel-eslint": "^10.1.0",
+    "babel-loader": "^8.1.0",
     "colors": "^1.4.0",
     "express": "^4.17.1",
     "glob": "^7.1.6",
@@ -48,6 +49,7 @@
     "webpack-stream": "^5.2.1",
     "yargs": "^15.1.0"
   },
+  "browserslist": "last 2 versions, > 0.5%, not dead",
   "eslintConfig": {
     "env": {
       "browser": true,

webpack.config.js

@@ -0,0 +1,24 @@
+const path = require('path');
+
+module.exports = {
+  mode: 'production',
+  entry: ["./js/index.js"],
+  output: {
+    path: path.join(__dirname, '/dist'),
+    filename: 'reveal.min.js',
+  },
+  module: {
+    rules: [
+      {
+        test: /\.js$/,
+        exclude: /(node_modules)/,
+        loader: 'babel-loader',
+        query: {
+          presets: [
+            [ '@babel/preset-env' ],
+          ],
+        },
+      },
+    ],
+  },
+};