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Issue 801687 link

Starred by 1 user
Status: WontFix
Owner: ----
Closed: Mar 2018
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug



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Improper number of pages in print mode in case of dynamic content

Reported by alexande...@gmail.com, Jan 12 2018 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Steps to reproduce the problem:
1. Open this codepen
https://codepen.io/oxygen90/pen/PEapKm/
in full-screen mode
https://s.codepen.io/oxygen90/debug/PEapKm/yoMZEQqQzOyk
2. Press "Ctrl + P" to trigger print mode.

What is the expected behavior?
Changing div height should cause adding a new page so that it can be printed entirely on two pages.

What went wrong?
After changing the div height it is still only one page and the div with red border couldn't be printed entirely.

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 28.0 r0

It looks like browser estimates a desired number of pages by the result of the previous rendering. If you reload a page, press "Ctrl + P" and then set custom page fields or choose another paper format (switch from US Letter to A4 for example) to trigger another `MediaQueryListEvent`, you can see that second page is added.

Comment 1 by krajshree@chromium.org, Jan 15 2018

Components: Internals>Printing
Labels: Triaged-ET M-65 Needs-Triage-M63 OS-Linux OS-Mac
Status: Untriaged (was: Unconfirmed)
Able to reproduce the issue on Mac 10.12.6, Win-10 and Ubuntu 14.04 using chrome reported version #63.0.3239.132 and latest canary #65.0.3321.0.
This is a non-regression issue as it is observed from M51 old builds. 
Note: In M50, the page crashed in full screen mode.

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

Thanks...!!

Comment 2 by thestig@chromium.org, Jan 22 2018 

Does the code work correctly in any other browser?

In Chromium, by the time the window.matchMedia('print') listener fires to update the <div> dimensions, the browser's printing code has already calculated the page count.

If you want JS to run before the browser's printing code, try window.onbeforeprint. Chromium has support for onbeforeprint in version 63.

Comment 3 by thestig@chromium.org, Jan 22 2018

Labels: -M-65 -Needs-Triage-M63 Needs-Feedback

Comment 4 by ellyjo...@chromium.org, Mar 12 2018

Status: WontFix (was: Untriaged)
Mac triage: closing old issue without feedback for >30 days.
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