Proposition: during range select when we are on the left or right date then focus left or right date.

[KES777]

Eg.

Here if we click right part, then December 20 should be activated and can change that date.

If right cursor is located in the left part

Then November 4 should be activated and I can change that date.

Current behavior.
Despite on where we clicked in the input text, in the calendar we select first (left date), then select second (right date). If we clicked once again the selected dates are cleared and process started from the beginning

Expected behavior.
If we selected big range and then realized that we want to change starting (left) date a little bit we are forced to scroll a lot left, select correct date and then we need to scroll a lot again to select second date. Instead it would be nice to just position cursor in the input text on the left/right date and the calendar activates that date change.

[t1m0n]

Interesting proposition, thanks. But I think it is better to implement it manually, because such feature is not crucial but could add a couple of kbs to the weight of library.

[KES777]

It looks hard to implement, because I never seen it was implemented on such sites like air or train tickets. Having this implemented here would make the world better.
I hope it will not take kbs, only few lines.