From 321e23acb2b02d657ca08727546c016d7ef27381 Mon Sep 17 00:00:00 2001
From: Lee Doughty <32392044+leedoughty@users.noreply.github.com>
Date: Mon, 13 Oct 2025 07:37:30 +0100
Subject: [PATCH] Replace custom UUID function with crypto.randomUUID (#4384)

---
 ts/editable/Mathjax.svelte |  3 +--
 ts/lib/tslib/uuid.ts       | 16 ----------------
 2 files changed, 1 insertion(+), 18 deletions(-)
 delete mode 100644 ts/lib/tslib/uuid.ts

diff --git a/ts/editable/Mathjax.svelte b/ts/editable/Mathjax.svelte
index 74fbbba43..65cf570ee 100644
--- a/ts/editable/Mathjax.svelte
+++ b/ts/editable/Mathjax.svelte
@@ -31,7 +31,6 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 </script>
 
 <script lang="ts">
-    import { randomUUID } from "@tslib/uuid";
     import { onDestroy } from "svelte";
     import { writable } from "svelte/store";
 
@@ -66,7 +65,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     $: empty = title === "MathJax";
     $: encoded = encodeURIComponent(converted);
 
-    const uuid = randomUUID();
+    const uuid = crypto.randomUUID();
     const imageHeight = writable(0);
     imageToHeightMap.set(uuid, imageHeight);
 
diff --git a/ts/lib/tslib/uuid.ts b/ts/lib/tslib/uuid.ts
deleted file mode 100644
index 8598261b0..000000000
--- a/ts/lib/tslib/uuid.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright: Ankitects Pty Ltd and contributors
-// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
-
-/**
- * TODO replace with crypto.randomUUID
- */
-export function randomUUID(): string {
-    const value = `${1e7}-${1e3}-${4e3}-${8e3}-${1e11}`;
-
-    return value.replace(/[018]/g, (character: string): string =>
-        (
-            Number(character)
-            ^ (crypto.getRandomValues(new Uint8Array(1))[0]
-                & (15 >> (Number(character) / 4)))
-        ).toString(16));
-}