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+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Overflow: scrollbar-gutter on the root with overflow:scroll</title>
+<link rel="author" title="Felipe Erias Morandeira" href="mailto:felipeerias@igalia.com" />
+<link rel="help" href="https://drafts.csswg.org/css-overflow-4/#scrollbar-gutter-property" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+<style>
+ body,
+ html {
+ margin: 0;
+ padding: 0;
+ border: none;
+ }
+
+ :root {
+ scrollbar-gutter: stable;
+ overflow: scroll;
+ }
+
+ #content {
+ background: green;
+ width: 100%;
+ height: 100px;
+ }
+</style>
+
+<body>
+
+ <div id="content"></div>
+
+ <script type="text/javascript">
+ setup({ explicit_done: true });
+
+ test(function () {
+ let root = document.documentElement;
+ let body = document.body;
+ let content = document.getElementById('content');
+ assert_equals(body.offsetWidth, root.offsetWidth, "root width");
+ assert_equals(content.offsetWidth, body.offsetWidth, "content width");
+ }, "root, body and content have the same width");
+
+ done();
+
+ </script>
+</body>