onChange called when opening the picker

[eliseidanciu]

Environment

Tech	Version
@material-ui/pickers	3.2.7
material-ui	4.5.1
React	16.8.6
Browser	chrome
Peer library	moment 2.24.0

Steps to reproduce

1. set initial date to null
2. disable today date
3. set prop variant="inline"
4. click on the datepicker to open it (don't select a date)

Expected behavior

TextField remains empty until a date is selected

Actual behavior

onChange is called passing the pre-selected date as a parameter (behaviour is similar to onOpen prop)

Live example

https://codesandbox.io/s/old-moon-853mg

[netcoding87]

Funny, yesterday we encountered the same issue. But not with setting the shouldDisableDate. Instead we set the maxDate property to a date in the past.

Live example

https://codesandbox.io/s/objective-proskuriakova-3qfnh

[YunitsynNikita]

Same issue

[YunitsynNikita]

This is the same post #1300, but still... Can we just open picker without selecting first allowed date?

[dmtrKovalenko]

@YunitsynNikita no. If your date is disabled we cannot render it as selected.