Add scrollOffset

[tb]

Extra parameter allows tuning react-scroll for react-md sidebar / toolbar. Fixes #143

[fisshy]

Thanks for your PR.

Why can't you use Offset?

[tb]

@fisshy I use offset, but in context of react-md top toolbar I need that new param to fix the scroll position generated by link click - in fact what I do is I cancel the offset like this:

nestedItems={
  sections.map(section => (
    <ListItem
      key={section.id}
      primaryText={section.headline}
      component={Scroll.Link}
      to={`section-${section.id}`}
      spy={true}
      offset={-64}
      scrollOffset={64}
    />
  ))
}

Without scrollOffset param I was not able to fix the link to scroll to proper position. And I cant skip offset because then the highlight on scroll does not work. So I either needed variable to skip offset on scrollTo helper or add scrollOffset which would allow me to adjust the scrollTo. SInce I found an issue and a PR doing scrollOffset (which for some strange reason incuded also some other changes) - I made new PR with only the scrollOffset :)

[maciejmyslinski]

@fisshy any update on this one? I'd really love to see this merged!
@tb could you please resolve conflicts? (BTW hello from 🇵🇱dude!)

[laurens-sprakel]

I have the the same problem as this
#278
The spy offset and the scroll offset are not the same
Can we merge this or does anyone have different solution for this problem?

[ronny-rentner]

I have the same problem, no clue why this is not merged

[blimpmason]

+1

[doxomo]

+1

[jakehobbs]

+1

[ongddree]

I have the same problem, please separate spy offset and scroll offset