Custom formula containerRect attributes

[t47io]

I was trying out the custom extensions from README:

var sparkScroll = require('react-spark-scroll/spark-scroll-rekapi')({
  invalidateAutomatically: true
  formulas: {

    //similar to the built-in topBottom formula, except that offset
    // is calculated as a percentage of the viewport height

    topBottomPct: (element, container, rect, containerRect, offset) =>
      ~~(rect.bottom - containerRect.top + offset*containerRect.clientHeight/100)
  }
});

In my testing, the containerRect does not have clientHeight attribute. It should be rather height. Please confirm, and if so, update the Docs. Thanks!

p.s. Also cannot resolve require('react-spark-scroll/spark-scroll-rekapi') in webpack. Used require('react-spark-scroll-rekapi') instead.

[t47io]

Or container.clientHeight?