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Issue 868774 link

Starred by 1 user
Status: Duplicate
Merged: issue 798535
Owner: ----
Closed: Aug 2
Cc:
bokan@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug



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mouseover/mouseout fire improperly when display element alternately

Reported by liuhao...@gmail.com, Jul 30 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Steps to reproduce the problem:
1. Open `index.html` in Chrome
2. Switch to `Console` tab of browser devtools
3. Click many times `Click!` text quickly

What is the expected behavior?
Console output nothing

What went wrong?
mouseover/mouseout fired when clicking `Click!` element

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 67.0.3396.99  Channel: stable
OS Version: 10.0
Flash Version: 

I can reproduce this issue on chrome canary 70.0.3506.0, but it's very different.
index.html
1.6 KB View Download
Video_2018-07-30_123011.mp4
2.0 MB View Download

Comment 1 by liuhao...@gmail.com, Jul 30 

Correction：
What is the expected behavior?
Console output nothing when clicking `Click!` element.

AFAIK, firefox/msedge works properly

Comment 2 by tkent@chromium.org, Jul 30

Components: Blink>Input

Comment 3 by woxxom@gmail.com, Jul 30 

Bisected to 3963e231e4c43187a05f3c6420f5df997d734ea0
"Send Mouse Leave events all the time when we get a ET_MOUSE_EXITED"
Landed in 57.0.2975.0

Simplified repro:
1. open the attached test.html
2. click the "Click" text 100 times without moving the mouse

Expected: only one initial "mouseover" shown
Observed: more than one "mouseover" or "mouseout" shown

Clicking can be done easily if you install AutoHotKey https://autohotkey.com
1. create a new file named click100.ahk 
2. put "F1::click 100" without quotes into the file
3. doubleclick the file to run it
4. point the mouse cursor over the target and press F1 key one time.

Comment 4 by woxxom@gmail.com, Jul 30

test.html
786 bytes View Download

Comment 5 by swarnasree.mukkala@chromium.org, Jul 30

Labels: Needs-Triage-M67

Comment 6 by krajshree@chromium.org, Jul 31

Labels: Triaged-ET Target-70 M-70 FoundIn-70 OS-Linux OS-Mac
Status: Untriaged (was: Unconfirmed)
Able to reproduce the issue on Mac 10.13.3, Win-10 and Ubuntu 14.04 using chrome reported version #67.0.3396.99 and latest canary #70.0.3506.0.
This is a non-regression issue as it is observed from M60 old builds. 

Hence, marking it as untriaged to get more inputs from dev team.

Thanks...!!

Comment 7 by bokan@chromium.org, Aug 2

Cc: bokan@chromium.org
Mergedinto: 798535
Status: Duplicate (was: Untriaged)
Looks like issue 798535
►

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