bencripps / react-redux-grid

    if (!container) {

        container = row && row.offsetParent

            ? row.offsetParent.offsetParent

            : null;

    }

    if (!container) {

        return {};

    }

    const rowBCR = row.getBoundingClientRect();

    const containerBCR = container.getBoundingClientRect();

    const spaceBottom = containerBCR.bottom - rowBCR.bottom;

    const spaceTop = rowBCR.top - containerBCR.top;

    const maxHeight = Math.max(spaceBottom, spaceTop);

    const position = spaceTop > spaceBottom

        ? 'top'

        : 'bottom';

    return {

        maxHeight,

        position

    };

};