Handle both-edge gutters in zero-width scrollers

cgqaq-chromium · chromium-wpt-export-bot · commit 6e31dcfa099e · 2026-05-15T14:34:37.000-07:00
Clamp both inline gutters when their reserved space exceeds the content box, avoiding a DCHECK in the scrollbar sizing fallback. Fixed: 513205371 Change-Id: I142d5ae69cbde3ae9b3170d8471c5058ae0f41bc Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7850672 Commit-Queue: Jason Leo <cgqaq@chromium.org> Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org> Cr-Commit-Position: refs/heads/main@{#1631005}
diff --git a/css/css-overflow/scrollbar-gutter-zero-width-crash.html b/css/css-overflow/scrollbar-gutter-zero-width-crash.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Overflow: zero-width scroller with scrollbar-gutter should not crash</title>
+<link rel="author" title="Jason Leo" href="mailto:cgqaq@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-overflow-4/#scrollbar-gutter-property">
+<style>
+#target {
+  overflow: auto;
+  scrollbar-gutter: stable both-edges;
+  width: 0;
+}
+</style>
+<div id="target"></div>
+<script>
+  target.scrollTop;
+</script>
