@gechiui/dom/build-module/dom/get-range-height.js

DOM utilities module for GeChiUI.

/**
 * Gets the height of the range without ignoring zero width rectangles, which
 * some browsers ignore when creating a union.
 *
 * @param {Range} range The range to check.
 * @return {number | undefined} Height of the range or undefined if the range has no client rectangles.
 */
export default function getRangeHeight(range) {
  const rects = Array.from(range.getClientRects());

  if (!rects.length) {
    return;
  }

  const highestTop = Math.min(...rects.map(_ref => {
    let {
      top
    } = _ref;
    return top;
  }));
  const lowestBottom = Math.max(...rects.map(_ref2 => {
    let {
      bottom
    } = _ref2;
    return bottom;
  }));
  return lowestBottom - highestTop;
}
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