Merge pull request #988 from jweston491/add-babel

Fix for #987. Thanks for submitting the issue, testing it and helping out with a pull request to @jweston491

gulpfile.js

@@ -160,7 +160,11 @@ gulp.task('scripts', function() {
 	];
 	gulp
 		.src(scripts, { allowEmpty: true })
-		.pipe(babel())
+		.pipe(babel(
+			{
+				presets: ['@babel/preset-env']
+			}
+		))
 		.pipe(concat('theme.min.js'))
 		.pipe(uglify())
 		.pipe(gulp.dest(paths.js));

package.json

@@ -27,6 +27,7 @@
   },
   "homepage": "https://understrap.com",
   "dependencies": {
+    "@babel/preset-env": "^7.4.5",
     "bootstrap": "^4.3.1",
     "browser-sync": "^2.26.3",
     "del": "^4.1.0",