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Merged
sindresorhus merged 2 commits into from
Sep 1, 2025
+12 −2
Merged

Improve isDoubleWidthEmojiCluster #65

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7f073be
Improve `isDoubleWidthEmojiCluster`
fisker Sep 1, 2025
dc64f11
Fix formatting issue in index.js
fisker Sep 1, 2025
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14 changes: 12 additions & 2 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,16 +32,26 @@ function isZeroWidthCluster(segment) {
}

function isDoubleWidthEmojiCluster(segment) {
const hasVs16 = segment.includes('\uFE0F');

if (hasVs16) {
return true;
}

const visible = baseVisible(segment);
const baseScalar = visible.codePointAt(0);
const baseChar = String.fromCodePoint(baseScalar);
const baseIsEmojiPresentation = emojiPresentationRegex.test(baseChar);
const hasVs16 = segment.includes('\uFE0F');
const hasVs15 = segment.includes('\uFE0E');

if (baseIsEmojiPresentation && !hasVs15) {
return true;
}

const codePointCount = [...segment].length;
const multiScalarMeaningful = codePointCount > 1 && !(codePointCount === 2 && hasVs15 && !hasVs16);

return hasVs16 || (baseIsEmojiPresentation && !hasVs15) || multiScalarMeaningful;
return multiScalarMeaningful;
}

function trailingHalfwidthWidth(segment, eastAsianWidthOptions) {
Expand Down