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Starred by 2 users
Status: Fixed
Closed: Apr 27
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OS: All
Pri: 3
Type: Launch-OWP
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Launch-M-Target: 59-Dev, 59-Beta, 59-Stable-Exp, 59-Stable
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Blocked on:
issue 668251

issue 714278

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Remove "reset" and "document" as valid zoom values in CSS.
Project Member Reported by, Nov 11 2016 Back to list
Change description:
Remove "reset" and "document" as valid zoom values in CSS.

Deprecation M-56, removal M-57.

Changes to API surface:
* "reset" no longer a valid value for zoom
* "document" no longer a valid value for zoom

Public standards discussion:
Zoom is not in the CSS standard. These properties existed in WebKit before the Blink branch. No other rendering engine supports them.

Removal discussion here:!msg/Blink-dev/Udxmfvq4Wf8/Jy4VsQxGAQAJ

Support in other browsers:
Internet Explorer: None
Firefox: None
Safari: Supported

Comment 1 by, Nov 23 2016
Blockedon: 668251
Comment 2 by, Feb 11 2017
Labels: -M-57 M-59
It took me a long time to do the refactor in  issue 668251  so I'm retargeting: deprecation 58 and removal 59.
Comment 3 by, Feb 13 2017
Labels: Update-Monthly Objective
Adding Blink>CSS tracking labels.
Project Member Comment 4 by, Feb 16 2017
The following revision refers to this bug:

commit c96485dba1223b9a7c6378b4a5b6c5a883e2b3e1
Author: bsep <>
Date: Thu Feb 16 04:44:06 2017

Deprecate CSS values zoom:reset and zoom:document.

Add a deprecation message and output to the console when zoom:reset or
zoom:document are used in preparation for their removal.

BUG= 664668 , 642613 

Cr-Commit-Position: refs/heads/master@{#450871}


Labels: Merge-Request-59
Project Member Comment 7 by, Apr 27
Labels: -Merge-Request-59 Hotlist-Merge-Approved Merge-Approved-59
Your change meets the bar and is auto-approved for M59. Please go ahead and merge the CL to branch 3071 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), gkihumba@(ChromeOS), Abdul Syed@(Desktop)

For more details visit - Your friendly Sheriffbot
Labels: Launch-M-Target-59-Dev Launch-M-Target-59-Beta Launch-M-Target-59-Stable-Exp Launch-M-Target-59-Stable
Note that zoom:reset was broken under use-zoom-for-dsf (issue 485650 - currently enabled for Windows, Linux, ChromeOS and Android but not Mac).  See  issue 714278 .  But since we've just removed zoom:reset support completely the problem has gone away :-)
Blocking: 714278
Project Member Comment 10 by, Apr 27
Labels: -merge-approved-59 merge-merged-3071
The following revision refers to this bug:

commit 30a210d86eaf8ca5bf2941a6bbee44b867300c6b
Author: Bret Sepulveda <>
Date: Thu Apr 27 22:42:27 2017

Delete deprecated properties zoom:reset and zoom:document.

BUG= 664668 , 642613 

Cr-Commit-Position: refs/heads/master@{#467454}
(cherry picked from commit 36095a2996117ee0b77d0badc9b237ea4d686521)

Review-Url: .
Cr-Commit-Position: refs/branch-heads/3071@{#277}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}


Status: Fixed
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