1338203 - [DateTimeInput] End key does not select the last date for the displayed month

Status: NEW

(Core :: Layout: Form Controls, defect, P3)

Description

[roxleitan]

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0
Build ID:20170208030203

[Affected versions]:
Nightly 54.0a1

[Affected platforms]:
All platforms: Ubuntu 16.04, Mac OS X 10.11, Windows 10

[Steps to reproduce]:
1.Launch Nightly 54.0a1 with a new profile
2.Set "dom.forms.datetime" and "dom.forms.datetime.timepicker" pref to True in about:config
3.In the URL bar enter "data:text/html, <input type="date">"
4.Choose month February and year 2017
5.Move focus to day segment
6.Press End key

[Expected result]:
End key should select the last date in the month displayed. (e.g. 28 for February)

[Actual result]:
The value for date is 31

Comment 1

[Jessica Jong [:jessica] (inactive)]

I remember, for simplicity, we just set it to 31, because the last day depends on month and year, which we may not have at the time user press the end key in day field. Another case is, user may still change the month or year after selecting the last day.

This is how Chrome works (using up/down key) as well.

Ni? UX to confirm this.

Comment 2

[Morpheus Chen [:morpheus] UX]

Yes, as Jessica mentioned, we had a discussion before and decided to fix the maximum number as 31 no matter what month is. The main reason was to simplify the mechanism after considering the engineering effort, the visual consistency, and usability. Please let me know if any questions, thanks.

Comment 3

[Wesley Huang [:wesley_huang] (EPM) (NI me)]

backlog it per comment 1 and comment 2