Tested the same on win10 chrome version 56.0.2924.21 and canary 57.0.2949.0 - alert displays on clicking the page

The same is observed in firefox browser as well

This doesn't seem to be a chrome specific issue. Could you please try the same in other browsers and update the thread

> The same is observed in firefox browser as well

Really!? As longs as I've tested, it isn't observed in Firefox (UA: "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0")
IE11 doesn't have same issue either (UA: "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; CMNTDFJS; GWX:QUALIFIED; rv:11.0) like Gecko").

Wait for Edge and others on Win10. Here I'm using Win7.

Tested this issue on Win-10 using chrome reported version #56.0.2924.21 and latest canary #57.0.2949.0.

Attached a screen cast (behavior in chrome and firefox) for reference.

Following are the steps followed to reproduce the issue.
------------
1. Opened the attached html in chrome browser.
2. Clicked on the body element.
3. Observed that alert pops up on clicking the body element.

Note: The same is observed in firefox also.

whosekiteneverfly@ - Could you please verify the screencast and please let us  know if anything missed from our side.

Thanks...!!

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	672688.mp4 2.4 MB View Download

Thanks for showing the screen cast.
But when is the event handler removed in the screen cast?

It looks that the second step to reproduce is not done...

> 2. Remove "onclick" attribute with the Developer Tools' "Elements" view.

I can't repro this in m55 or m57.

Will try again with m56..

I've made screencasts for firefox and chrome.
Both browsers are on my personal machine (same as the one I used to report this issue)
And Firefox version is 50.0.2.
Chrome is now 56.0.2924.28 beta.

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Deleted: firefox.gif 167 KB

	firefox.gif 167 KB View Download

Able to reproduce the issue on windows 7, Linux Ubuntu 14.04 and Mac 10.12.1 using chrome version 55.0.2883.87 and canary 57.0.2952.0.

This is regression issue broken in M34.Please find the bisect information as below
Narrow Bisect::
Good::34.0.1837.0  -- (build revision -- 250689)
Bad:: 34.0.1839.0  -- (build revision --  250996)

CHANGELOG URL:
====================  https://chromium.googlesource.com/chromium/src/+log/f7670318d01f066b46dd199e11e18b4d13428b01..8d613aab7e400fcde8829d8a55138230c8d5c3b8

BLINK CHANGELOG URL:
=====================  http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.htmlurl=/trunk&range=167002%3A167000

Possible suspects::
https://codereview.chromium.org/149803005
https://codereview.chromium.org/159903005

haraken@ could you please look into this issue if it is related to your change,else please help us in finding the appropriate owner for this issue.

Thanks,

Just to Update:
Still able to reproduce the issue on Ubuntu 14.04 using latest chrome version 57.0.2969.0.

haraken@ Could you please look into this issue.

Thanks!

shiino-san: This looks like a bug I caused three years ago, but would you mind taking a look at this?

Able to reproduce the issue on windows 7 using chrome version 57.0.2976.0.

yukishiino@ Please look into this issue.

Thanks,

I cannot reproduce this issue with 57.0.2970.0 dev on GNU/Linux.
Is this Windows-specific?

Just to update, still able to reproduce this issue on Ubuntu 14.04 and Mac 10.12.2 using chrome version #57.0.2970.0 and latest canary #57.0.2985.0.

Attaching screencast of Ubuntu 14.04 for reference

yukishiino@ - Could you please have a look into this issue. This issue is seen on mac and linux also.

Thanks...!!

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	672688.ogv 4.2 MB View Download

Confirmed a repro.  Probably it was my mistake that I failed to repro before.

pfeldman@, could you triage this issue in DevTools team?  I guess this is an issue of DevTools.  If DevTools called removeAttribute("onclick") internally, the event handler should be removed.