Reverse a Unicode text while preserving grapheme clusters

reverseUnicodeText.js

const segmenter = new Intl.Segmenter();
const zeroWidthSpace = "\u200B";
/**
 * Checks if the combination of segments is a single grapheme unit.
 * @param {Intl.SegmentData} combination
 * @returns {Boolean}
 */
const isGraphemeUnit = combination => Array.from(segmenter.segment(combination)).length === 1;
/**
 * Removes unwanted zero-width spaces based on their context in the text.
 * @param {Intl.SegmentData} current
 * @param {Number} index
 * @param {Array<SegmentData>} source
 * @returns
 */
const removeUnwantedZws = (current, index, { [index - 1]: previous, [index + 1]: next }) => {
	const currentSegment = current.segment;
	if (currentSegment === zeroWidthSpace) {
		if (previous) {
			return isGraphemeUnit(`${previous.segment}${currentSegment}`);
		} else if (next) {
			return isGraphemeUnit(`${currentSegment}${next.segment}`);
		}
	}
	return true;
};
/**
 * Adds a zero-width space to current grapheme segment to prevent it from combining with
 * the previous segment if they could become a single grapheme unit when placed together.
 * @param {Intl.SegmentData} current
 * @param {Number} index
 * @param {Array<SegmentData>} source
 * @returns
 */
const mapGrapheme = (current, index, { [index - 1]: previous }) => {
	const currentSegment = current.segment;
	if (previous && isGraphemeUnit(`${currentSegment}${previous.segment}`)) {
		return `${currentSegment}${zeroWidthSpace}`;
	}
	return currentSegment;
};
/**
 * Reverses the Unicode text while preserving grapheme clusters and handling zero-width spaces.
 * @param {String} text
 * @returns
 */
const reverseUnicodeText = text => Array.from(segmenter.segment(text)).filter(removeUnwantedZws).map(mapGrapheme).reverse().join("");