Re: [w3c/screen-orientation] Reliability of angle (#162)

I have been testing that the primary and secondary orientations and associated angles match with different results on Firefox and Chrome.  The web platform test is here https://github.com/web-platform-tests/wpt/pull/15429

I have been testing on my phone.  The test checks that portrait-secondary angle is 180, that landscape-primary is either 90 or 270 and landscape-secondary is the angle left over.

When I run the tests in Firefox, sometimes the angles are exactly right, but running the tests multiple times - the angle can get "stuck" and doesn't change.

In Chrome, the results are variable, I have had some where all 3 angles are right but more often 2 out of 3 are right or more random results.

Would be great to hear thoughts.  Also this is the new table in the spec where the primary/secondary orientations and angles are explained https://w3c.github.io/screen-orientation/#reading-the-screen-orientation


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