diff --git a/app/javascript/mastodon/main.js b/app/javascript/mastodon/main.js
index cc422c1099..a7fc22a00f 100644
--- a/app/javascript/mastodon/main.js
+++ b/app/javascript/mastodon/main.js
@@ -1,12 +1,14 @@
+import * as OfflinePluginRuntime from 'offline-plugin/runtime';
+import * as WebPushSubscription from './web_push_subscription';
+import Mastodon from 'mastodon/containers/mastodon';
+import React from 'react';
+import ReactDOM from 'react-dom';
 import ready from './ready';
 
 const perf = require('./performance');
 
 function main() {
   perf.start('main()');
-  const Mastodon = require('mastodon/containers/mastodon').default;
-  const React = require('react');
-  const ReactDOM = require('react-dom');
 
   if (window.history && history.replaceState) {
     const { pathname, search, hash } = window.location;
@@ -23,9 +25,6 @@ function main() {
     ReactDOM.render(<Mastodon {...props} />, mountNode);
     if (process.env.NODE_ENV === 'production') {
       // avoid offline in dev mode because it's harder to debug
-      const OfflinePluginRuntime = require('offline-plugin/runtime');
-      const WebPushSubscription = require('./web_push_subscription');
-
       OfflinePluginRuntime.install();
       WebPushSubscription.register();
     }
diff --git a/app/javascript/packs/about.js b/app/javascript/packs/about.js
index 7b8ab5e5d8..6705377c10 100644
--- a/app/javascript/packs/about.js
+++ b/app/javascript/packs/about.js
@@ -1,12 +1,11 @@
-import TimelineContainer from '../mastodon/containers/timeline_container';
-import React from 'react';
-import ReactDOM from 'react-dom';
 import loadPolyfills from '../mastodon/load_polyfills';
-import ready from '../mastodon/ready';
 
 require.context('../images/', true);
 
 function loaded() {
+  const TimelineContainer = require('../mastodon/containers/timeline_container').default;
+  const React = require('react');
+  const ReactDOM = require('react-dom');
   const mountNode = document.getElementById('mastodon-timeline');
 
   if (mountNode !== null) {
@@ -16,6 +15,7 @@ function loaded() {
 }
 
 function main() {
+  const ready = require('../mastodon/ready').default;
   ready(loaded);
 }
 
diff --git a/app/javascript/packs/application.js b/app/javascript/packs/application.js
index 63c5d62720..116632dea7 100644
--- a/app/javascript/packs/application.js
+++ b/app/javascript/packs/application.js
@@ -1,6 +1,7 @@
-import main from '../mastodon/main';
 import loadPolyfills from '../mastodon/load_polyfills';
 
-loadPolyfills().then(main).catch(e => {
+loadPolyfills().then(() => {
+  require('../mastodon/main').default();
+}).catch(e => {
   console.error(e);
 });
diff --git a/app/javascript/packs/public.js b/app/javascript/packs/public.js
index 371e0f4453..ce79836d66 100644
--- a/app/javascript/packs/public.js
+++ b/app/javascript/packs/public.js
@@ -1,44 +1,43 @@
-import { length } from 'stringz';
-import IntlRelativeFormat from 'intl-relativeformat';
-import { delegate } from 'rails-ujs';
-import emojify from '../mastodon/emoji';
-import { getLocale } from '../mastodon/locales';
 import loadPolyfills from '../mastodon/load_polyfills';
-import ready from '../mastodon/ready';
 
-const { localeData } = getLocale();
-localeData.forEach(IntlRelativeFormat.__addLocaleData);
+function main() {
+  const { length } = require('stringz');
+  const IntlRelativeFormat = require('intl-relativeformat').default;
+  const { delegate } = require('rails-ujs');
+  const emojify = require('../mastodon/emoji').default;
+  const { getLocale } = require('../mastodon/locales');
+  const ready = require('../mastodon/ready').default;
 
-function loaded() {
-  const locale = document.documentElement.lang;
-  const dateTimeFormat = new Intl.DateTimeFormat(locale, {
-    year: 'numeric',
-    month: 'long',
-    day: 'numeric',
-    hour: 'numeric',
-    minute: 'numeric',
-  });
-  const relativeFormat = new IntlRelativeFormat(locale);
+  const { localeData } = getLocale();
+  localeData.forEach(IntlRelativeFormat.__addLocaleData);
 
-  [].forEach.call(document.querySelectorAll('.emojify'), (content) => {
-    content.innerHTML = emojify(content.innerHTML);
-  });
+  ready(() => {
+    const locale = document.documentElement.lang;
+    const dateTimeFormat = new Intl.DateTimeFormat(locale, {
+      year: 'numeric',
+      month: 'long',
+      day: 'numeric',
+      hour: 'numeric',
+      minute: 'numeric',
+    });
+    const relativeFormat = new IntlRelativeFormat(locale);
 
-  [].forEach.call(document.querySelectorAll('time.formatted'), (content) => {
-    const datetime = new Date(content.getAttribute('datetime'));
-    const formattedDate = dateTimeFormat.format(datetime);
-    content.title = formattedDate;
-    content.textContent = formattedDate;
-  });
+    [].forEach.call(document.querySelectorAll('.emojify'), (content) => {
+      content.innerHTML = emojify(content.innerHTML);
+    });
 
-  [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
-    const datetime = new Date(content.getAttribute('datetime'));
-    content.textContent = relativeFormat.format(datetime);;
-  });
-}
+    [].forEach.call(document.querySelectorAll('time.formatted'), (content) => {
+      const datetime = new Date(content.getAttribute('datetime'));
+      const formattedDate = dateTimeFormat.format(datetime);
+      content.title = formattedDate;
+      content.textContent = formattedDate;
+    });
 
-function main() {
-  ready(loaded);
+    [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
+      const datetime = new Date(content.getAttribute('datetime'));
+      content.textContent = relativeFormat.format(datetime);;
+    });
+  });
 
   delegate(document, '.video-player video', 'click', ({ target }) => {
     if (target.paused) {