Upgrade babel 7.

.babelrc

@@ -1,6 +1,9 @@
 {
   "presets": [
-    "env",
+    "@babel/preset-env",
-    "react"
+    "@babel/preset-react"
+  ],
+  "plugins": [
+    "@babel/plugin-transform-runtime"
   ]
 }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "hotkeys-js",
   "description": "A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.",
-  "version": "3.6.3",
+  "version": "3.6.4",
   "main": "index.js",
   "module": "dist/hotkeys.esm.js",
   "scripts": {
@@ -44,12 +44,13 @@
   },
   "dependencies": {},
   "devDependencies": {
+    "@babel/core": "^7.4.4",
+    "@babel/plugin-external-helpers": "^7.2.0",
+    "@babel/plugin-transform-runtime": "^7.4.4",
+    "@babel/preset-env": "^7.4.4",
+    "@babel/preset-react": "^7.0.0",
     "autoprefixer": "^8.6.1",
-    "babel-core": "^6.26.3",
     "babel-eslint": "^8.2.3",
-    "babel-plugin-external-helpers": "^6.22.0",
-    "babel-preset-env": "^1.7.0",
-    "babel-preset-react": "^6.24.1",
     "bannerjs": "^1.0.5",
     "classnames": "^2.2.5",
     "colors-cli": "^1.0.13",
@@ -61,20 +62,20 @@
     "gh-pages": "^1.2.0",
     "highlight.js": "^9.12.0",
     "husky": "^1.0.0-rc.8",
-    "jest": "^22.4.4",
+    "jest": "^24.7.1",
     "less": "^3.0.4",
     "parcel-bundler": "^1.12.3",
-    "parcel-plugin-markdown-string": "^1.3.1",
+    "parcel-plugin-markdown-string": "^1.3.5",
     "postcss-modules": "^1.1.0",
     "puppeteer": "^1.14.0",
     "react": "^16.7.0",
     "react-dom": "^16.7.0",
     "react-markdown": "^3.3.2",
     "rimraf": "^2.6.3",
-    "rollup": "^0.57.1",
+    "rollup": "^1.11.0",
-    "rollup-plugin-babel": "^3.0.4",
+    "rollup-plugin-babel": "^4.3.2",
-    "rollup-plugin-commonjs": "^9.1.3",
+    "rollup-plugin-commonjs": "^9.3.4",
-    "rollup-plugin-node-resolve": "^3.3.0",
+    "rollup-plugin-node-resolve": "^4.2.3",
     "uglify-js": "^3.4.0",
     "zlib": "^1.0.5"
   }

scripts/build.js

@@ -31,7 +31,6 @@ async function build() {
       pure_getters: true,
       unsafe: true,
       unsafe_comps: true,
-      warnings: false,
     },
     output: {
       ascii_only: true,
@@ -48,14 +47,14 @@ async function build() {
     banner: banner.multibanner(),
   });
 
-  const umdMinified = `${banner.onebanner()}\n${uglify.minify(umd.code, uglifyOption).code}`;
+  const umdMinified = `${banner.onebanner()}\n${uglify.minify(umd.output[0].code, uglifyOption).code}`;
 
   const common = await bundle.generate({
     format: 'cjs',
     name: 'hotkeys',
     banner: banner.multibanner(),
   });
-  const commonMinified = `${banner.onebanner()}\n${uglify.minify(common.code, uglifyOption).code}`;
+  const commonMinified = `${banner.onebanner()}\n${uglify.minify(common.output[0].code, uglifyOption).code}`;
 
   const es = await bundle.generate({
     format: 'es',
@@ -63,11 +62,11 @@ async function build() {
     banner: banner.multibanner(),
   });
 
-  write('dist/hotkeys.js', umd.code)
+  write('dist/hotkeys.js', umd.output[0].code)
     .then(() => write('dist/hotkeys.min.js', umdMinified, true))
-    .then(() => write('dist/hotkeys.common.js', common.code))
+    .then(() => write('dist/hotkeys.common.js', common.output[0].code))
     .then(() => write('dist/hotkeys.common.min.js', commonMinified, true))
-    .then(() => write('dist/hotkeys.esm.js', es.code));
+    .then(() => write('dist/hotkeys.esm.js', es.output[0].code));
 }
 
 build();
@@ -96,5 +95,8 @@ function write(dest, code, zip) {
 }
 
 function getSize(code) {
-  return `${(code.length / 1024).toFixed(2)}kb`;
+  if (code) {
+    return `${(code.toString().length / 1024).toFixed(2)}kb`;
+  }
+  return '';
 }

src/.babelrc

@@ -1,8 +1,12 @@
 {
   "presets": [
-    ["env", {
+    [
+      "@babel/preset-env",
+      {
         "modules": false
-    }]
+      }
+    ]
   ],
-  "plugins": ["external-helpers"]
+  "plugins": [
+  ]
 }