default block props is start

[mteason]

if alignToTop is default, default of props block is also start.

[dominikbulaj]

Hi,
not sure what you mean, but yes, when alignToTop is set to true then those two options are used:

if (alignToTop) {
  options.block = 'start' // defines vertical alignment 
  options.inline = 'nearest' // defines horizontal alignment
}

Ref.: https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView

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If you think it's an issue, feel free to describe proper behavior :)

[mteason]

sorry for my bad english,
I just want to set block to 'center'

[dominikbulaj]

So you would like to set both block and inline to center, right? I think new prop can be used for that - something like alignCenter : boolean

[mteason]

yes, I hope scrollIntoViewOptions could be customized

[dominikbulaj]

Right, good point. scrollIntoViewOptions can be an optional object prop that when passed it overwrites other settings. I will work on it today or tomorrow.
Stay tuned and thanks, @mteason :)

[dominikbulaj]

Released as v1.9.0
You can pass scrollIOptions that accepts an object with the same properties as you can pass to element.scrollIntoView(scrollIntoViewOptions);. See MDN docs