The spec for CSS Motion Path now states that the initial value for offset-anchor is 'auto', not 'center'.
An example where the difference is important is SVG, where the used value for transform-origin defaults to 0 0, not center. Some of our SVG motion path demos don't work if 'center' is incorrectly used as the default offset-anchor.
Comment 1 by alancutter@chromium.org
, Nov 28 2016