dart:html

deltaX property

num deltaX

The amount that is expected to scroll horizontally, in units determined by deltaMode.

See also:

• WheelEvent.deltaX from the W3C.

Implementation

num get deltaX {
  // deltaX may be missing or undefined.
  num? value = JS('', '#.deltaX', this);
  if (value != null) return value;
  throw new UnsupportedError('deltaX is not supported');
}