Issue with device=ALL parameter reset and JST date discrepancy

[Tomo Suzu]

First-time poster here. Is this the right place to report a bug?

I would like to report two issues I found while using the CrUX Vis.

1. The "device" query parameter is reset when `identifier=url`
When accessing the site via a share link that includes the "device=ALL" parameter with `identifier=url`, it is automatically replaced with `device=DESKTOP`.

Steps to reproduce:
1. Access the following URL: https://cruxvis.withgoogle.com/#/?url=https%3A%2F%2Fgoogle.com%2F&identifier=url&device=ALL&periodStart=0&periodEnd=-1&display=p75s&view=cwvsummary
2. Observe the URL in the address bar after the page loads.

Expected Result: The `device=ALL` parameter remains, and the visualization shows data for all devices.
Actual Result: The parameter is changed to `device=DESKTOP` automatically.

2. Date discrepancy in Japanese Timezone (JST)
I am accessing the tool from Japan (JST).

There seems to be a timezone conversion issue regarding the report date display.

For example, if the CrUX History API report's `collectionPeriod[].lastDate` is `{ "year": 2026, "month": 3, "day": 21 }`, the UI displays it as 2026-03-20.

It would be helpful to fix the conversion logic or display the date with the specific timezone (e.g., "2026-03-21 PST") to avoid misunderstanding.

Thank you.

 

SuzuTomo

[Barry Pollard]

Thanks for the report. Both are bugs and I've submitted fixes for them for review, so hopefully we'll get that rolled out ASAP.

For the date format, this is a silly ISO formatting fix (roll on Temporal—available soon!!!!). I'd rather not put the timezone in as think it needlessly complicates the UI without adding much value IMHO. Our docs note all CrUX data is based off of the PST timezone.

Thanks,

Barry