Please provide a sample URL where you encountered the problem for the ease of repro.

This bug does not relate to any specific url, any html with <input
type=file> will do.
But the real problem is, in order to repro the bug, you need to prepare a
lot of files, whose `lastModified` date or `created` date is intensely
distributed across the time.
Then Mac's builtin date serialization mechanism will cast these attributes
to "今天 00:43" or “昨天 13:21” or "2017年9月8日", chromium's file upload open
dialog will sort files by these string values, which is not the expected.

2017-09-09 2:44 GMT+08:00 ligim… via monorail <
monorail+v2.2642961223@chromium.org>:

Note：Where does the “无日期” group column name come from？？？

Deleted: file-open-dialog.png 226 KB

	file-open-dialog.png 226 KB View Download

This seems to be an issue with the file picker. We don't actually have much control over it. Can you take some screenshots of the filepicker with Chrome vs. with Safari showing the differences and appropriate behavior?

Sorry i missed this, but I remember Safari is no problem, but i can't make
screenshots now(now at about 09:00, chrome and safari seem to be both
consistent).

I guess the problem may be due to the time when the file is
downloaded(00:00~03:00?), so i need another time to verify.

But i just found another problem: When i had downloaded a file named
.....pdf.download, & changed its filename suffix to pdf(remove .download),
but then when i opened the file select dialog in Chrome, the dialog still
displayed the old filename. While Safari is OK.

So i guess maybe there is some bug in the Chrome's file select dialog
code(Although it used the Mac system's, but there may be some settings not
correctly set?)

2017-09-14 4:43 GMT+08:00 erikc… via monorail <
monorail+v2.3185994615@chromium.org>:

Thank you for providing more feedback. Adding requester "erikchen@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Update: I have just found Safari's file upload dialog also has the “无日期” group column name. So the wierd thing is, why it appears, and when it disappears.

:-)

[mac bug triage] The Mac file picker control handles the sort order of the files it displays. If you click a column header you can change what it sorts by (name, creation date, etc.).