From 51449360f51e9c6aa87979667fd4d21f8e162d68 Mon Sep 17 00:00:00 2001
From: Kendell R <KTibow@users.noreply.github.com>
Date: Thu, 30 Nov 2023 06:38:27 -0800
Subject: [PATCH] fix(cleanupIds): properly handle begin regex to fix #1775
 (#1862)

---
 plugins/cleanupIds.js          |  2 +-
 test/plugins/cleanupIds.24.svg | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 test/plugins/cleanupIds.24.svg

diff --git a/plugins/cleanupIds.js b/plugins/cleanupIds.js
index c113db283..671a85248 100644
--- a/plugins/cleanupIds.js
+++ b/plugins/cleanupIds.js
@@ -13,7 +13,7 @@ exports.description = 'removes unused IDs and minifies used';
 
 const regReferencesUrl = /\burl\((["'])?#(.+?)\1\)/g;
 const regReferencesHref = /^#(.+?)$/;
-const regReferencesBegin = /(\D+)\./;
+const regReferencesBegin = /(\w+)\.[a-zA-Z]/;
 const generateIdChars = [
   'a',
   'b',
diff --git a/test/plugins/cleanupIds.24.svg b/test/plugins/cleanupIds.24.svg
new file mode 100644
index 000000000..26de623c1
--- /dev/null
+++ b/test/plugins/cleanupIds.24.svg
@@ -0,0 +1,24 @@
+Properly rename IDs, by matching them properly (exclude semicolons, include numbers)
+See https://github.com/svg/svgo/issues/1775
+
+===
+
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+  <circle cx="12" cy="12">
+    <animate id="thing1" fill="freeze" attributeName="r" begin="0;thing2.end" dur="1.2s" values="0;11"/>
+  </circle>
+  <circle cx="12" cy="12">
+    <animate id="thing2" fill="freeze" attributeName="r" begin="thing1.begin+0.2s" dur="1.2s" values="0;11"/>
+  </circle>
+</svg>
+
+@@@
+
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
+    <circle cx="12" cy="12">
+        <animate id="b" fill="freeze" attributeName="r" begin="0;a.end" dur="1.2s" values="0;11"/>
+    </circle>
+    <circle cx="12" cy="12">
+        <animate id="a" fill="freeze" attributeName="r" begin="b.begin+0.2s" dur="1.2s" values="0;11"/>
+    </circle>
+</svg>
\ No newline at end of file