diff --git a/app/javascript/flavours/glitch/components/hashtag_bar.tsx b/app/javascript/flavours/glitch/components/hashtag_bar.tsx
index 91fa922198..ed5de7d3a5 100644
--- a/app/javascript/flavours/glitch/components/hashtag_bar.tsx
+++ b/app/javascript/flavours/glitch/components/hashtag_bar.tsx
@@ -24,7 +24,7 @@ export type StatusLike = Record<{
 
 function normalizeHashtag(hashtag: string) {
   return (
-    hashtag && hashtag.startsWith('#') ? hashtag.slice(1) : hashtag
+    !!hashtag && hashtag.startsWith('#') ? hashtag.slice(1) : hashtag
   ).normalize('NFKC');
 }
 
diff --git a/app/javascript/flavours/glitch/packs/admin.tsx b/app/javascript/flavours/glitch/packs/admin.tsx
index 57a017ff7d..5c1e43d1cf 100644
--- a/app/javascript/flavours/glitch/packs/admin.tsx
+++ b/app/javascript/flavours/glitch/packs/admin.tsx
@@ -363,6 +363,6 @@ ready(() => {
   document.querySelectorAll('[data-admin-component]').forEach((element) => {
     void mountReactComponent(element);
   });
-}).catch((reason) => {
+}).catch((reason: unknown) => {
   throw reason;
 });
diff --git a/app/javascript/flavours/glitch/packs/public.tsx b/app/javascript/flavours/glitch/packs/public.tsx
index 6087f7b7c1..d4002a7a3b 100644
--- a/app/javascript/flavours/glitch/packs/public.tsx
+++ b/app/javascript/flavours/glitch/packs/public.tsx
@@ -69,7 +69,7 @@ window.addEventListener('message', (e) => {
       },
       '*',
     );
-  }).catch((e) => {
+  }).catch((e: unknown) => {
     console.error('Error in setHeightMessage postMessage', e);
   });
 });
@@ -206,7 +206,7 @@ function loaded() {
 
         return true;
       })
-      .catch((error) => {
+      .catch((error: unknown) => {
         console.error(error);
       });
   }
@@ -448,7 +448,7 @@ Rails.delegate(document, '#registration_new_user,#new_user', 'submit', () => {
 });
 
 function main() {
-  ready(loaded).catch((error) => {
+  ready(loaded).catch((error: unknown) => {
     console.error(error);
   });
 }
@@ -457,6 +457,6 @@ loadPolyfills()
   .then(loadLocale)
   .then(main)
   .then(loadKeyboardExtensions)
-  .catch((error) => {
+  .catch((error: unknown) => {
     console.error(error);
   });
diff --git a/app/javascript/flavours/glitch/uuid.ts b/app/javascript/flavours/glitch/uuid.ts
index 4d0a8a8036..0b4d55beb6 100644
--- a/app/javascript/flavours/glitch/uuid.ts
+++ b/app/javascript/flavours/glitch/uuid.ts
@@ -4,5 +4,6 @@ export function uuid(a?: string): string {
         (a as unknown as number) ^
         ((Math.random() * 16) >> ((a as unknown as number) / 4))
       ).toString(16)
-    : ('' + 1e7 + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, uuid);
+    : // eslint-disable-next-line @typescript-eslint/restrict-plus-operands
+      ('' + 1e7 + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, uuid);
 }