diff --git a/app/javascript/flavours/glitch/entrypoints/application.js b/app/javascript/flavours/glitch/entrypoints/application.ts
similarity index 80%
rename from app/javascript/flavours/glitch/entrypoints/application.js
rename to app/javascript/flavours/glitch/entrypoints/application.ts
index a0b5d714c4..3659d8212b 100644
--- a/app/javascript/flavours/glitch/entrypoints/application.js
+++ b/app/javascript/flavours/glitch/entrypoints/application.ts
@@ -2,7 +2,7 @@ import '@/entrypoints/public-path';
 
 import { start } from 'flavours/glitch/common';
 import { loadLocale } from 'flavours/glitch/locales';
-import main from "flavours/glitch/main";
+import main from 'flavours/glitch/main';
 import { loadPolyfills } from 'flavours/glitch/polyfills';
 
 start();
@@ -10,6 +10,6 @@ start();
 loadPolyfills()
   .then(loadLocale)
   .then(main)
-  .catch(e => {
+  .catch((e: unknown) => {
     console.error(e);
   });
diff --git a/app/javascript/flavours/glitch/entrypoints/error.js b/app/javascript/flavours/glitch/entrypoints/error.ts
similarity index 66%
rename from app/javascript/flavours/glitch/entrypoints/error.js
rename to app/javascript/flavours/glitch/entrypoints/error.ts
index 4315d20de1..9e067d4caa 100644
--- a/app/javascript/flavours/glitch/entrypoints/error.js
+++ b/app/javascript/flavours/glitch/entrypoints/error.ts
@@ -2,7 +2,9 @@ import '@/entrypoints/public-path';
 import ready from 'flavours/glitch/ready';
 
 ready(() => {
-  const image = document.querySelector('img');
+  const image = document.querySelector<HTMLImageElement>('img');
+
+  if (!image) return;
 
   image.addEventListener('mouseenter', () => {
     image.src = '/oops.gif';
@@ -11,4 +13,6 @@ ready(() => {
   image.addEventListener('mouseleave', () => {
     image.src = '/oops.png';
   });
+}).catch((e: unknown) => {
+  console.error(e);
 });
diff --git a/app/javascript/flavours/glitch/entrypoints/inert.js b/app/javascript/flavours/glitch/entrypoints/inert.ts
similarity index 100%
rename from app/javascript/flavours/glitch/entrypoints/inert.js
rename to app/javascript/flavours/glitch/entrypoints/inert.ts
diff --git a/app/javascript/flavours/glitch/entrypoints/mailer.js b/app/javascript/flavours/glitch/entrypoints/mailer.ts
similarity index 100%
rename from app/javascript/flavours/glitch/entrypoints/mailer.js
rename to app/javascript/flavours/glitch/entrypoints/mailer.ts
diff --git a/app/javascript/flavours/glitch/entrypoints/share.jsx b/app/javascript/flavours/glitch/entrypoints/share.tsx
similarity index 74%
rename from app/javascript/flavours/glitch/entrypoints/share.jsx
rename to app/javascript/flavours/glitch/entrypoints/share.tsx
index 62d2f6df42..0eda442506 100644
--- a/app/javascript/flavours/glitch/entrypoints/share.jsx
+++ b/app/javascript/flavours/glitch/entrypoints/share.tsx
@@ -16,7 +16,7 @@ function loaded() {
 
     if (!attr) return;
 
-    const props = JSON.parse(attr);
+    const props = JSON.parse(attr) as object;
     const root = createRoot(mountNode);
 
     root.render(<ComposeContainer {...props} />);
@@ -24,9 +24,13 @@ function loaded() {
 }
 
 function main() {
-  ready(loaded);
+  ready(loaded).catch((error: unknown) => {
+    console.error(error);
+  });
 }
 
-loadPolyfills().then(main).catch(error => {
-  console.error(error);
-});
+loadPolyfills()
+  .then(main)
+  .catch((error: unknown) => {
+    console.error(error);
+  });