Bug 210050

Summary:	Cannot detect middle click with bluetooth mouse on iPadOS 13.4
Product:	WebKit	Reporter:	Ashley Gullen <ashley>
Component:	UI Events	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	graouts, ogay, simon.fraser, thorton, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 13
Hardware:	iPhone / iPad
OS:	iOS 13

Description Ashley Gullen 2020-04-06 09:09:02 PDT

Middle clicks with a bluetooth mouse on iPadOS 13.4 register as a left click instead of a middle click. The 'button' property of both mousedown and pointerdown events is 0 (for left button), when it should be 1 (for middle button).

Demo: https://downloads.scirra.com/labs/ipadosmouse/

It works correctly with the same bluetooth mouse on macOS, so it is not the mouse. I used a Microsoft Bluetooth Mouse (RJN-00002).

This breaks any middle mouse button feature in web apps on iPadOS, like dragging the middle mouse button for pan scrolling.

Comment 1 Radar WebKit Bug Importer 2020-04-07 11:42:20 PDT

<rdar://problem/61402823>

Comment 2 Tim Horton 2020-04-07 13:08:38 PDT

Hmm, indeed, good point! Right now we only have primary and secondary buttons.