/**
 * Returns true if two ranges are equal, or false otherwise. Ranges are
 * considered equal if their start and end occur in the same container and
 * offset.
 *
 * @param {Range|null} a First range object to test.
 * @param {Range|null} b First range object to test.
 *
 * @return {boolean} Whether the two ranges are equal.
 */
export function isRangeEqual(a, b) {
  return a === b || a && b && a.startContainer === b.startContainer && a.startOffset === b.startOffset && a.endContainer === b.endContainer && a.endOffset === b.endOffset;
}
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