diff --git a/src/static/js/broadcast_slider.ts b/src/static/js/broadcast_slider.ts
index b630496eb..8ff1b9d20 100644
--- a/src/static/js/broadcast_slider.ts
+++ b/src/static/js/broadcast_slider.ts
@@ -24,9 +24,9 @@
 
 // These parameters were global, now they are injected. A reference to the
 // Timeslider controller would probably be more appropriate.
-const _ = require('./underscore');
-const padmodals = require('./pad_modals').padmodals;
-const colorutils = require('./colorutils').colorutils;
+import _ from './underscore.js';
+import {padmodals} from './pad_modals.js';
+import {colorutils} from './colorutils.js';
 import html10n from './vendors/html10n';
 
 const loadBroadcastSliderJS = (fireWhenAllScriptsAreLoaded) => {
@@ -373,4 +373,4 @@ const loadBroadcastSliderJS = (fireWhenAllScriptsAreLoaded) => {
   return BroadcastSlider;
 };
 
-exports.loadBroadcastSliderJS = loadBroadcastSliderJS;
+export {loadBroadcastSliderJS};
diff --git a/src/static/js/chat.ts b/src/static/js/chat.ts
index 35b0e96b0..fd0aa5e37 100644
--- a/src/static/js/chat.ts
+++ b/src/static/js/chat.ts
@@ -16,20 +16,19 @@
  * limitations under the License.
  */
 
-import ChatMessage from './ChatMessage';
-import padutils from './pad_utils'
-const padcookie = require('./pad_cookie').padcookie;
-const Tinycon = require('tinycon/tinycon');
-const hooks = require('./pluginfw/hooks');
-const padeditor = require('./pad_editor').padeditor;
+import ChatMessage from './ChatMessage.js';
+import padutils from './pad_utils.js'
+import {padcookie} from './pad_cookie.js';
+import Tinycon from 'tinycon/tinycon';
+import hooks from './pluginfw/hooks.js';
+import {padeditor} from './pad_editor.js';
 import html10n from './vendors/html10n';
 
 // Removes diacritics and lower-cases letters. https://stackoverflow.com/a/37511463
 const normalize = (s) => s.normalize('NFD').replace(/[\u0300-\u036f]/g, '').toLowerCase();
 
 
-exports.chat = (() => {
-  let isStuck = false;
+const chat = (() => {
   let userAndChat = false;
   let chatMentions = 0;
   return {
@@ -296,3 +295,5 @@ exports.chat = (() => {
     },
   };
 })();
+
+export {chat};
diff --git a/src/static/js/collab_client.ts b/src/static/js/collab_client.ts
index c90f92e80..f49377a9b 100644
--- a/src/static/js/collab_client.ts
+++ b/src/static/js/collab_client.ts
@@ -23,9 +23,9 @@
  * limitations under the License.
  */
 
-const chat = require('./chat').chat;
-const hooks = require('./pluginfw/hooks');
-const browser = require('./vendors/browser');
+import {chat} from './chat.js';
+import hooks from './pluginfw/hooks.js';
+import browser from './vendors/browser.js';
 
 // Dependency fill on init. This exists for `pad.socket` only.
 // TODO: bind directly to the socket.
@@ -510,4 +510,4 @@ const getCollabClient = (ace2editor, serverVars, initialUserInfo, options, _pad)
   return self;
 };
 
-exports.getCollabClient = getCollabClient;
+export {getCollabClient};