support of major browsers since 2015

babel.config.js

+const presets = [
+    [
+        "@babel/env",
+        {
+            targets: {
+                "browsers": ["chrome >= 40 or firefox >= 35 or safari > 9"]
+            },
+            useBuiltIns: "usage",
+            corejs: 3,
+        },
+    ],
+];
+
+module.exports = { presets };
\ No newline at end of file

package.json

@@ -4,21 +4,23 @@
   "description": "",
   "main": "index.js",
   "scripts": {
+    "babel": "babel src -d __tmp_minerva_plugin -D ",
+    "clean-babel": "rimraf __tmp_minerva_plugin",
     "build-css": "node-sass --include-path src/css src/css/styles.scss src/css/styles.css",
-    "build": "mkdirp dist && npm run build-css && browserify -t [ babelify --presets es2015 ] -t browserify-css src/js/index.js | uglifyjs --compress --mangle > dist/plugin.js ",
-    "build-debug": "mkdirp dist && npm run build-css && browserify -t [ babelify --presets es2015 ] -t browserify-css src/js/index.js> dist/plugin.js ",
-    "watch-js": "mkdirp dist && npm run build-css && watchify -v -t [ babelify --presets es2015 ] -t browserify-css src/js/index.js -o dist/plugin.js",
-    "clean": "rimraf dist"
+    "build": "mkdirp dist && npm run build-css && npm run babel && browserify -t browserify-css __tmp_minerva_plugin/js/index.js | uglifyjs --compress --mangle > dist/plugin.js && npm run clean-babel",
+    "build-debug": "mkdirp dist && npm run build-css  && npm run babel && browserify -t browserify-css __tmp_minerva_plugin/js/index.js > dist/plugin.js && npm run clean-babel",
+    "clean": "rimraf dist && npm run clean-babel"
   },
   "author": "David Hoksza",
   "license": "MIT",
   "devDependencies": {
-    "babel-core": "^6.26.0",
-    "babel-preset-es2015": "^6.24.1",
-    "babelify": "^8.0.0",
+    "@babel/cli": "^7.6.2",
+    "@babel/core": "^7.6.2",
+    "@babel/preset-env": "^7.6.2",
     "bower": "^1.5.2",
     "browserify": "^14.5.0",
     "browserify-css": "^0.13.1",
+    "core-js": "^3.2.1",
     "mkdirp": "^0.5.1",
     "node-sass": "^4.6.1",
     "rimraf": "latest",
@@ -26,6 +28,7 @@
     "watchify": "^3.9.0"
   },
   "dependencies": {
+    "@babel/polyfill": "^7.6.0",
     "bootstrap": "^4.3.1",
     "bootstrap-table": "1.14.2",
     "bootstrap-treeview": "github:diegokogan/bootstrap-treeview",