dart:html

scrollY property

int scrollY

The distance this window has been scrolled vertically.

Other resources

• The Screen interface specification from W3C.
• scrollY from MDN.

Implementation

int get scrollY => JS<bool>('bool', '("scrollY" in #)', this)
    ? JS<num>('num', '#.scrollY', this).round()
    : document.documentElement!.scrollTop;