popover placement behaviour problems

[publicocean0]

comparing the behaviour of auto placement of datatime picker with popover there are many emprovements to do: when i resize page for example popover lose the right position;
In addition, auto setting for my opition has a insufficient information because it starts to place where it want not where developer wants. Usually i set a normal position where i want place popover, if it is not possible so then try to re place automatically in different side. A better setting for replacement could be auto:start_side:strategy , where auto_start is the normal side where place it, strategy is moviment sense in the automatic replacement , in the sense of clock or opposite.
example : auto:right:round_to_left replace in the right side if possible else place it in top if possible else place in left side if possible ... (opposite of clock orientation )

[hnrch02]

when i resize page for example popover lose the right position

Adding a fix for this will be considered for v4, see #12799.

In addition, auto setting for my opition has a insufficient information because it starts to place where it want not where developer wants. Usually i set a normal position where i want place popover, if it is not possible so then try to re place automatically in different side. A better setting for replacement could be auto:start_side:strategy , where auto_start is the normal side where place it, strategy is moviment sense in the automatic replacement , in the sense of clock or opposite.
example : auto:right:round_to_left replace in the right side if possible else place it in top if possible else place in left side if possible ... (opposite of clock orientation )

I'm not sure I fully understand you here, but if you're unhappy with the auto placement you can always roll with your custom solution by passing a function as the placement option.
Anyhow, we have multiple open issues regarding placement of tooltips and also a few PRs trying to improve it. Moreover, there is #14327 in which outsourcing the whole placement code to a different library was discussed with the conclusion of considering it for v4.

I'm going to close this issue but feel free to send a PR if you have a working implementation of your proposal. Thanks!