What should happen with input.selectionStart = null;

[smaug----]

it is now quite unclear how setting selectiongStart/End to null should behave.
"On setting, it must act as if the setSelectionRange() method had been called, with the new value as the first argument; the current value of the selectionEnd attribute as the second argument, unless the current value of the selectionEnd is less than the new value, in which case the second argument must also be the new value; and the current value of the selectionDirection as the third argument."

is the idea that there is implicit null -> long conversion? so null would mean 0 ?

@zcorpan ?
#1006

[zcorpan]

Yes, it should convert null to unsigned long, is how I figured it should work. I agree it is not great with "act as if foo method had been called" language though. We should have an abstract algorithm that is invoked by the relevant APIs instead.