Update index.ts

src/index.ts

@@ -16,12 +16,14 @@ export type SkinTone = '' | 'none' | 'light' | 'mediumLight' | 'medium' | 'mediu
  * RGI Emoji Modifier Sequence.
  *
  * @param {string} emoji - The original emoji string.
- * @param {SkinTone} [tone] - The skin tone to apply. If undefined, returns the original emoji.
+ * @param {SkinTone} tone - The skin tone to apply. If empty, returns the original emoji.
  * @returns {string} The emoji string with skin tones applied where applicable.
  */
 export default function skinTone(emoji: string, tone?: SkinTone): string {
-  const skinToneMap: Record<SkinTone, string> = {
-    '': '',
+  if (!tone) {
+    return emoji;
+  }
+  const skinTonMap = {
     none: '',
     light: '\u{1F3FB}',
     mediumLight: '\u{1F3FC}',
@@ -30,29 +32,22 @@ export default function skinTone(emoji: string, tone?: SkinTone): string {
     dark: '\u{1F3FF}',
   };
 
-  // If no tone or invalid tone is provided, return the original emoji
-  if (!tone || !(tone in skinToneMap)) {
-    return emoji;
-  }
+  let zwj = '\u200D';
 
-  const zwj = emoji.includes('\u200D\ud83E\udd1D\u200D') ? '\u200D\ud83E\udd1D\u200D' : '\u200D';
+  // Hand Shake 🧑‍🤝‍🧑
+  if (emoji.includes('\u200d\ud83e\udd1d\u200d')) {
+    zwj = '\u200d\ud83e\udd1d\u200d';
+  }
 
   const parts = emoji.split(zwj);
   const modifiedParts = parts.map((part) => {
-    // Remove existing skin tone modifiers
-    const basePart = part.replace(/[\u{1F3FB}-\u{1F3FF}]/gu, '');
-
-    // If tone is 'none', return the base part without modifiers
-    if (tone === 'none') {
-      return basePart;
-    }
+    const basePart = part.replace(/\p{Emoji_Modifier}/gu, '');
 
-    // Check if the base part is an Emoji Modifier Base
     if (/\p{Emoji_Modifier_Base}/u.test(basePart)) {
-      return basePart + skinToneMap[tone];
+      return basePart.replace(/(\p{Extended_Pictographic}+)(\uFE0F?)/u, `$1${skinTonMap[tone]}`);
     }
     return part;
   });
 
   return modifiedParts.join(zwj);
-}
+}