Bug 253816

Summary:	Page blocked when click wheel(middle) button
Product:	WebKit	Reporter:	Dean Xu <dean.xu>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED INVALID
Severity:	Major
Priority:	P2
Version:	Other
Hardware:	PC
OS:	Windows 10

Description Dean Xu 2023-03-13 04:06:57 PDT

For following case, drag scroll thumb (the green block) can scroll as normal.
But if you click the wheel(middle) button, the whole page is blocked, even after reload or switch page.


```html
<!DOCTYPE html>
<html lang="en">
<head>
    <style>
        main {
            overflow: auto;
            scrollbar-gutter: stable;
        }

        div {
            background: linear-gradient(90deg, blue, red);
            width: 4000px;
            height: 100px;
        }

        main::-webkit-scrollbar {
            width: 16px;
            background-color: black;
        }

        main::-webkit-scrollbar-thumb {
            background: green;
        }
    </style>
    <title>Scroll Gutter Bug</title>
</head>
<body>
<main>
    <div>

    </div>
</main>
</body>
</html>
```

Comment 1 Dean Xu 2023-03-13 04:09:54 PDT

Using Chrome Version 110.0.5481.177 (Official Build) (64-bit)

Comment 2 Sam Sneddon [:gsnedders] 2023-03-13 06:53:30 PDT

(In reply to Dean Xu from comment #1)
> Using Chrome Version 110.0.5481.177 (Official Build) (64-bit)

Chrome hasn't used WebKit since 2013. They maintain their own bug tracker at https://crbug.com/