range selection doesn't work with only 'to' date

[Sam-Apostel]

When using mode="range" you can use selected={{ from: new Date(), to: undefined }} and it renders correctly. But when I use selected={{ from: undefined, to: new Date() }} nothing seems to be selected and the next time you click a date the onSelect callback doesn't receive the to-date.

Is this a bug or intentional?
Is there a way to toggle this behaviour? What would this look like if I were to implement this?

[Sam-Apostel]

PR adding this behaviour: #1876

[dimitur2204]

@Sam-Apostel I believe this is a desired behaviour! Think about it - it makes sense to have a selected from date where the picker is clicked once with an option to pick an end, but not the other way around.
In that case you have

{
    start: Date
    end: undefined
}

Try it here https://react-day-picker.js.org/basics/selecting-days#selecting-a-range-of-days.