optimized indexOf and runtime RegExp

2/twemoji.amd.js

@@ -228,6 +228,10 @@ define(function () {
       // http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
       re = /\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d[\udc69\udc68]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc41\u200d\ud83d\udde8|(?:[\u0039\u0038\u0037\u0036\u0035\u0034\u0033\u0032\u0031\u0030\u002a\u0023])\ufe0f?\u20e3|(?:(?:[\u270c\u261d])(?:\ufe0f|(?!\ufe0e))|\ud83e\udd18|\ud83d[\udc42\udc43\udc46-\udc50\udc66-\udc69\udc6e\udc70-\udc78\udc7c\udc81-\udc83\udc85-\udc87\udcaa\udd75\udd90\udd95\udd96\ude45-\ude47\ude4b-\ude4f\udea3\udeb4-\udeb6\udec0]|\ud83c[\udf85\udfc2-\udfc4\udfc7\udfca\udfcb]|[\u270d\u270b\u270a\u26f9])(?:\ud83c[\udffb-\udfff]|)|\ud83c\udde6\ud83c[\udde8-\uddec\uddee\uddf1\uddf2\uddf4\uddf6-\uddfa\uddfc\uddfd\uddff]|\ud83c\udde7\ud83c[\udde6\udde7\udde9-\uddef\uddf1-\uddf4\uddf6-\uddf9\uddfb\uddfc\uddfe\uddff]|\ud83c\udde8\ud83c[\udde6\udde8\udde9\uddeb-\uddee\uddf0-\uddf5\uddf7\uddfa-\uddff]|\ud83c\udde9\ud83c[\uddea\uddec\uddef\uddf0\uddf2\uddf4\uddff]|\ud83c\uddea\ud83c[\udde6\udde8\uddea\uddec\udded\uddf7-\uddfa]|\ud83c\uddeb\ud83c[\uddee-\uddf0\uddf2\uddf4\uddf7]|\ud83c\uddec\ud83c[\udde6\udde7\udde9-\uddee\uddf1-\uddf3\uddf5-\uddfa\uddfc\uddfe]|\ud83c\udded\ud83c[\uddf0\uddf2\uddf3\uddf7\uddf9\uddfa]|\ud83c\uddee\ud83c[\udde8-\uddea\uddf1-\uddf4\uddf6-\uddf9]|\ud83c\uddef\ud83c[\uddea\uddf2\uddf4\uddf5]|\ud83c\uddf0\ud83c[\uddea\uddec-\uddee\uddf2\uddf3\uddf5\uddf7\uddfc\uddfe\uddff]|\ud83c\uddf1\ud83c[\udde6-\udde8\uddee\uddf0\uddf7-\uddfb\uddfe]|\ud83c\uddf2\ud83c[\udde6\udde8-\udded\uddf0-\uddff]|\ud83c\uddf3\ud83c[\udde6\udde8\uddea-\uddec\uddee\uddf1\uddf4\uddf5\uddf7\uddfa\uddff]|\ud83c\uddf4\ud83c\uddf2|\ud83c\uddf5\ud83c[\udde6\uddea-\udded\uddf0-\uddf3\uddf7-\uddf9\uddfc\uddfe]|\ud83c\uddf6\ud83c\udde6|\ud83c\uddf7\ud83c[\uddea\uddf4\uddf8\uddfa\uddfc]|\ud83c\uddf8\ud83c[\udde6-\uddea\uddec-\uddf4\uddf7-\uddf9\uddfb\uddfd-\uddff]|\ud83c\uddf9\ud83c[\udde6\udde8\udde9\uddeb-\udded\uddef-\uddf4\uddf7\uddf9\uddfb\uddfc\uddff]|\ud83c\uddfa\ud83c[\udde6\uddec\uddf2\uddf8\uddfe\uddff]|\ud83c\uddfb\ud83c[\udde6\udde8\uddea\uddec\uddee\uddf3\uddfa]|\ud83c\uddfc\ud83c[\uddeb\uddf8]|\ud83c\uddfd\ud83c\uddf0|\ud83c\uddfe\ud83c[\uddea\uddf9]|\ud83c\uddff\ud83c[\udde6\uddf2\uddfc]|\ud83e[\udd10-\udd17\udd80-\udd84\uddc0]|\ud83d[\udc00-\udc41\udc44\udc45\udc51-\udc65\udc6a-\udc6d\udc6f\udc79-\udc7b\udc7d-\udc80\udc84\udc88-\udca9\udcab-\udcfd\udcff-\udd3d\udd49-\udd4e\udd50-\udd67\udd6f\udd70\udd73\udd74\udd76-\udd79\udd87\udd8a-\udd8d\udda5\udda8\uddb1\uddb2\uddbc\uddc2-\uddc4\uddd1-\uddd3\udddc-\uddde\udde1\udde3\udde8\uddef\uddf3\uddfa-\ude44\ude48-\ude4a\ude80-\udea2\udea4-\udeb3\udeb7-\udebf\udec1-\udec5\udecb-\uded0\udee0-\udee5\udee9\udeeb\udeec\udef0\udef3]|\ud83c[\udccf\udd8e\udd91-\udd9a\udde6-\uddff\ude01\ude32-\ude36\ude38-\ude3a\ude50\ude51\udf00-\udf21\udf24-\udf84\udf86-\udf93\udf96\udf97\udf99-\udf9b\udf9e-\udfc1\udfc5\udfc6\udfc8\udfc9\udfcc-\udff0\udff3-\udff5\udff7-\udfff]|[\ue50a\u27bf\u27b0\u2797\u2796\u2795\u2763\u2755\u2754\u2753\u274e\u274c\u2728\u2721\u271d\u2705\u26f8\u26f7\u26f4\u26f1\u26f0\u26e9\u26d3\u26d1\u26cf\u26ce\u26c8\u26b1\u26b0\u269c\u269b\u2699\u2697\u2696\u2694\u2692\u2638\u262f\u262e\u262a\u2626\u2623\u2622\u2620\u2618\u2604\u2603\u2602\u23fa\u23f9\u23f8\u23f3\u23f2\u23f1\u23f0\u23ef\u23ee\u23ed\u23ec\u23eb\u23ea\u23e9\u23cf\u2328]|(?:\ud83c[\udc04\udd70\udd71\udd7e\udd7f\ude02\ude1a\ude2f\ude37]|[\u3299\u3297\u303d\u3030\u2b55\u2b50\u2b1c\u2b1b\u2b07\u2b06\u2b05\u2935\u2934\u27a1\u2764\u2757\u2747\u2744\u2734\u2733\u2716\u2714\u2712\u270f\u2709\u2708\u2702\u26fd\u26fa\u26f5\u26f3\u26f2\u26ea\u26d4\u26c5\u26c4\u26be\u26bd\u26ab\u26aa\u26a1\u26a0\u2693\u267f\u267b\u2668\u2666\u2665\u2663\u2660\u2653\u2652\u2651\u2650\u264f\u264e\u264d\u264c\u264b\u264a\u2649\u2648\u263a\u2639\u2615\u2614\u2611\u260e\u2601\u2600\u25fe\u25fd\u25fc\u25fb\u25c0\u25b6\u25ab\u25aa\u24c2\u231b\u231a\u21aa\u21a9\u2199\u2198\u2197\u2196\u2195\u2194\u2139\u2122\u2049\u203c\u00ae\u00a9])(?:\ufe0f|(?!\ufe0e))/g,
 
+      // avoid runtime RegExp creation for not so smart,
+      // not JIT based, and old browsers / engines
+      UFE0Fg = /\uFE0F/g,
+
       // used to find HTML special chars in attributes
       rescaper = /[&<>'"]/g,
 
@@ -312,9 +316,9 @@ define(function () {
      */
     function grabTheRightIcon(rawText) {
       // if variant is present as \uFE0F
-      return toCodePoint(/\u200D/.test(rawText) ?
-        rawText :
-        rawText.replace(/\uFE0F/g, '')
+      return toCodePoint(rawText.indexOf('\u200D') < 0 ?
+        rawText.replace(UFE0Fg, '') :
+        rawText
       );
     }
 

2/twemoji.js

@@ -227,6 +227,10 @@ var twemoji = (function (
     // http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
     re = /\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d[\udc69\udc68]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc41\u200d\ud83d\udde8|(?:[\u0039\u0038\u0037\u0036\u0035\u0034\u0033\u0032\u0031\u0030\u002a\u0023])\ufe0f?\u20e3|(?:(?:[\u270c\u261d])(?:\ufe0f|(?!\ufe0e))|\ud83e\udd18|\ud83d[\udc42\udc43\udc46-\udc50\udc66-\udc69\udc6e\udc70-\udc78\udc7c\udc81-\udc83\udc85-\udc87\udcaa\udd75\udd90\udd95\udd96\ude45-\ude47\ude4b-\ude4f\udea3\udeb4-\udeb6\udec0]|\ud83c[\udf85\udfc2-\udfc4\udfc7\udfca\udfcb]|[\u270d\u270b\u270a\u26f9])(?:\ud83c[\udffb-\udfff]|)|\ud83c\udde6\ud83c[\udde8-\uddec\uddee\uddf1\uddf2\uddf4\uddf6-\uddfa\uddfc\uddfd\uddff]|\ud83c\udde7\ud83c[\udde6\udde7\udde9-\uddef\uddf1-\uddf4\uddf6-\uddf9\uddfb\uddfc\uddfe\uddff]|\ud83c\udde8\ud83c[\udde6\udde8\udde9\uddeb-\uddee\uddf0-\uddf5\uddf7\uddfa-\uddff]|\ud83c\udde9\ud83c[\uddea\uddec\uddef\uddf0\uddf2\uddf4\uddff]|\ud83c\uddea\ud83c[\udde6\udde8\uddea\uddec\udded\uddf7-\uddfa]|\ud83c\uddeb\ud83c[\uddee-\uddf0\uddf2\uddf4\uddf7]|\ud83c\uddec\ud83c[\udde6\udde7\udde9-\uddee\uddf1-\uddf3\uddf5-\uddfa\uddfc\uddfe]|\ud83c\udded\ud83c[\uddf0\uddf2\uddf3\uddf7\uddf9\uddfa]|\ud83c\uddee\ud83c[\udde8-\uddea\uddf1-\uddf4\uddf6-\uddf9]|\ud83c\uddef\ud83c[\uddea\uddf2\uddf4\uddf5]|\ud83c\uddf0\ud83c[\uddea\uddec-\uddee\uddf2\uddf3\uddf5\uddf7\uddfc\uddfe\uddff]|\ud83c\uddf1\ud83c[\udde6-\udde8\uddee\uddf0\uddf7-\uddfb\uddfe]|\ud83c\uddf2\ud83c[\udde6\udde8-\udded\uddf0-\uddff]|\ud83c\uddf3\ud83c[\udde6\udde8\uddea-\uddec\uddee\uddf1\uddf4\uddf5\uddf7\uddfa\uddff]|\ud83c\uddf4\ud83c\uddf2|\ud83c\uddf5\ud83c[\udde6\uddea-\udded\uddf0-\uddf3\uddf7-\uddf9\uddfc\uddfe]|\ud83c\uddf6\ud83c\udde6|\ud83c\uddf7\ud83c[\uddea\uddf4\uddf8\uddfa\uddfc]|\ud83c\uddf8\ud83c[\udde6-\uddea\uddec-\uddf4\uddf7-\uddf9\uddfb\uddfd-\uddff]|\ud83c\uddf9\ud83c[\udde6\udde8\udde9\uddeb-\udded\uddef-\uddf4\uddf7\uddf9\uddfb\uddfc\uddff]|\ud83c\uddfa\ud83c[\udde6\uddec\uddf2\uddf8\uddfe\uddff]|\ud83c\uddfb\ud83c[\udde6\udde8\uddea\uddec\uddee\uddf3\uddfa]|\ud83c\uddfc\ud83c[\uddeb\uddf8]|\ud83c\uddfd\ud83c\uddf0|\ud83c\uddfe\ud83c[\uddea\uddf9]|\ud83c\uddff\ud83c[\udde6\uddf2\uddfc]|\ud83e[\udd10-\udd17\udd80-\udd84\uddc0]|\ud83d[\udc00-\udc41\udc44\udc45\udc51-\udc65\udc6a-\udc6d\udc6f\udc79-\udc7b\udc7d-\udc80\udc84\udc88-\udca9\udcab-\udcfd\udcff-\udd3d\udd49-\udd4e\udd50-\udd67\udd6f\udd70\udd73\udd74\udd76-\udd79\udd87\udd8a-\udd8d\udda5\udda8\uddb1\uddb2\uddbc\uddc2-\uddc4\uddd1-\uddd3\udddc-\uddde\udde1\udde3\udde8\uddef\uddf3\uddfa-\ude44\ude48-\ude4a\ude80-\udea2\udea4-\udeb3\udeb7-\udebf\udec1-\udec5\udecb-\uded0\udee0-\udee5\udee9\udeeb\udeec\udef0\udef3]|\ud83c[\udccf\udd8e\udd91-\udd9a\udde6-\uddff\ude01\ude32-\ude36\ude38-\ude3a\ude50\ude51\udf00-\udf21\udf24-\udf84\udf86-\udf93\udf96\udf97\udf99-\udf9b\udf9e-\udfc1\udfc5\udfc6\udfc8\udfc9\udfcc-\udff0\udff3-\udff5\udff7-\udfff]|[\ue50a\u27bf\u27b0\u2797\u2796\u2795\u2763\u2755\u2754\u2753\u274e\u274c\u2728\u2721\u271d\u2705\u26f8\u26f7\u26f4\u26f1\u26f0\u26e9\u26d3\u26d1\u26cf\u26ce\u26c8\u26b1\u26b0\u269c\u269b\u2699\u2697\u2696\u2694\u2692\u2638\u262f\u262e\u262a\u2626\u2623\u2622\u2620\u2618\u2604\u2603\u2602\u23fa\u23f9\u23f8\u23f3\u23f2\u23f1\u23f0\u23ef\u23ee\u23ed\u23ec\u23eb\u23ea\u23e9\u23cf\u2328]|(?:\ud83c[\udc04\udd70\udd71\udd7e\udd7f\ude02\ude1a\ude2f\ude37]|[\u3299\u3297\u303d\u3030\u2b55\u2b50\u2b1c\u2b1b\u2b07\u2b06\u2b05\u2935\u2934\u27a1\u2764\u2757\u2747\u2744\u2734\u2733\u2716\u2714\u2712\u270f\u2709\u2708\u2702\u26fd\u26fa\u26f5\u26f3\u26f2\u26ea\u26d4\u26c5\u26c4\u26be\u26bd\u26ab\u26aa\u26a1\u26a0\u2693\u267f\u267b\u2668\u2666\u2665\u2663\u2660\u2653\u2652\u2651\u2650\u264f\u264e\u264d\u264c\u264b\u264a\u2649\u2648\u263a\u2639\u2615\u2614\u2611\u260e\u2601\u2600\u25fe\u25fd\u25fc\u25fb\u25c0\u25b6\u25ab\u25aa\u24c2\u231b\u231a\u21aa\u21a9\u2199\u2198\u2197\u2196\u2195\u2194\u2139\u2122\u2049\u203c\u00ae\u00a9])(?:\ufe0f|(?!\ufe0e))/g,
 
+    // avoid runtime RegExp creation for not so smart,
+    // not JIT based, and old browsers / engines
+    UFE0Fg = /\uFE0F/g,
+
     // used to find HTML special chars in attributes
     rescaper = /[&<>'"]/g,
 
@@ -311,9 +315,9 @@ var twemoji = (function (
    */
   function grabTheRightIcon(rawText) {
     // if variant is present as \uFE0F
-    return toCodePoint(/\u200D/.test(rawText) ?
-      rawText :
-      rawText.replace(/\uFE0F/g, '')
+    return toCodePoint(rawText.indexOf('\u200D') < 0 ?
+      rawText.replace(UFE0Fg, '') :
+      rawText
     );
   }
 

2/twemoji.npm.js

@@ -228,6 +228,10 @@ var twemoji = (function (
     // http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
     re = /\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d[\udc69\udc68]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc67\udc66]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc41\u200d\ud83d\udde8|(?:[\u0039\u0038\u0037\u0036\u0035\u0034\u0033\u0032\u0031\u0030\u002a\u0023])\ufe0f?\u20e3|(?:(?:[\u270c\u261d])(?:\ufe0f|(?!\ufe0e))|\ud83e\udd18|\ud83d[\udc42\udc43\udc46-\udc50\udc66-\udc69\udc6e\udc70-\udc78\udc7c\udc81-\udc83\udc85-\udc87\udcaa\udd75\udd90\udd95\udd96\ude45-\ude47\ude4b-\ude4f\udea3\udeb4-\udeb6\udec0]|\ud83c[\udf85\udfc2-\udfc4\udfc7\udfca\udfcb]|[\u270d\u270b\u270a\u26f9])(?:\ud83c[\udffb-\udfff]|)|\ud83c\udde6\ud83c[\udde8-\uddec\uddee\uddf1\uddf2\uddf4\uddf6-\uddfa\uddfc\uddfd\uddff]|\ud83c\udde7\ud83c[\udde6\udde7\udde9-\uddef\uddf1-\uddf4\uddf6-\uddf9\uddfb\uddfc\uddfe\uddff]|\ud83c\udde8\ud83c[\udde6\udde8\udde9\uddeb-\uddee\uddf0-\uddf5\uddf7\uddfa-\uddff]|\ud83c\udde9\ud83c[\uddea\uddec\uddef\uddf0\uddf2\uddf4\uddff]|\ud83c\uddea\ud83c[\udde6\udde8\uddea\uddec\udded\uddf7-\uddfa]|\ud83c\uddeb\ud83c[\uddee-\uddf0\uddf2\uddf4\uddf7]|\ud83c\uddec\ud83c[\udde6\udde7\udde9-\uddee\uddf1-\uddf3\uddf5-\uddfa\uddfc\uddfe]|\ud83c\udded\ud83c[\uddf0\uddf2\uddf3\uddf7\uddf9\uddfa]|\ud83c\uddee\ud83c[\udde8-\uddea\uddf1-\uddf4\uddf6-\uddf9]|\ud83c\uddef\ud83c[\uddea\uddf2\uddf4\uddf5]|\ud83c\uddf0\ud83c[\uddea\uddec-\uddee\uddf2\uddf3\uddf5\uddf7\uddfc\uddfe\uddff]|\ud83c\uddf1\ud83c[\udde6-\udde8\uddee\uddf0\uddf7-\uddfb\uddfe]|\ud83c\uddf2\ud83c[\udde6\udde8-\udded\uddf0-\uddff]|\ud83c\uddf3\ud83c[\udde6\udde8\uddea-\uddec\uddee\uddf1\uddf4\uddf5\uddf7\uddfa\uddff]|\ud83c\uddf4\ud83c\uddf2|\ud83c\uddf5\ud83c[\udde6\uddea-\udded\uddf0-\uddf3\uddf7-\uddf9\uddfc\uddfe]|\ud83c\uddf6\ud83c\udde6|\ud83c\uddf7\ud83c[\uddea\uddf4\uddf8\uddfa\uddfc]|\ud83c\uddf8\ud83c[\udde6-\uddea\uddec-\uddf4\uddf7-\uddf9\uddfb\uddfd-\uddff]|\ud83c\uddf9\ud83c[\udde6\udde8\udde9\uddeb-\udded\uddef-\uddf4\uddf7\uddf9\uddfb\uddfc\uddff]|\ud83c\uddfa\ud83c[\udde6\uddec\uddf2\uddf8\uddfe\uddff]|\ud83c\uddfb\ud83c[\udde6\udde8\uddea\uddec\uddee\uddf3\uddfa]|\ud83c\uddfc\ud83c[\uddeb\uddf8]|\ud83c\uddfd\ud83c\uddf0|\ud83c\uddfe\ud83c[\uddea\uddf9]|\ud83c\uddff\ud83c[\udde6\uddf2\uddfc]|\ud83e[\udd10-\udd17\udd80-\udd84\uddc0]|\ud83d[\udc00-\udc41\udc44\udc45\udc51-\udc65\udc6a-\udc6d\udc6f\udc79-\udc7b\udc7d-\udc80\udc84\udc88-\udca9\udcab-\udcfd\udcff-\udd3d\udd49-\udd4e\udd50-\udd67\udd6f\udd70\udd73\udd74\udd76-\udd79\udd87\udd8a-\udd8d\udda5\udda8\uddb1\uddb2\uddbc\uddc2-\uddc4\uddd1-\uddd3\udddc-\uddde\udde1\udde3\udde8\uddef\uddf3\uddfa-\ude44\ude48-\ude4a\ude80-\udea2\udea4-\udeb3\udeb7-\udebf\udec1-\udec5\udecb-\uded0\udee0-\udee5\udee9\udeeb\udeec\udef0\udef3]|\ud83c[\udccf\udd8e\udd91-\udd9a\udde6-\uddff\ude01\ude32-\ude36\ude38-\ude3a\ude50\ude51\udf00-\udf21\udf24-\udf84\udf86-\udf93\udf96\udf97\udf99-\udf9b\udf9e-\udfc1\udfc5\udfc6\udfc8\udfc9\udfcc-\udff0\udff3-\udff5\udff7-\udfff]|[\ue50a\u27bf\u27b0\u2797\u2796\u2795\u2763\u2755\u2754\u2753\u274e\u274c\u2728\u2721\u271d\u2705\u26f8\u26f7\u26f4\u26f1\u26f0\u26e9\u26d3\u26d1\u26cf\u26ce\u26c8\u26b1\u26b0\u269c\u269b\u2699\u2697\u2696\u2694\u2692\u2638\u262f\u262e\u262a\u2626\u2623\u2622\u2620\u2618\u2604\u2603\u2602\u23fa\u23f9\u23f8\u23f3\u23f2\u23f1\u23f0\u23ef\u23ee\u23ed\u23ec\u23eb\u23ea\u23e9\u23cf\u2328]|(?:\ud83c[\udc04\udd70\udd71\udd7e\udd7f\ude02\ude1a\ude2f\ude37]|[\u3299\u3297\u303d\u3030\u2b55\u2b50\u2b1c\u2b1b\u2b07\u2b06\u2b05\u2935\u2934\u27a1\u2764\u2757\u2747\u2744\u2734\u2733\u2716\u2714\u2712\u270f\u2709\u2708\u2702\u26fd\u26fa\u26f5\u26f3\u26f2\u26ea\u26d4\u26c5\u26c4\u26be\u26bd\u26ab\u26aa\u26a1\u26a0\u2693\u267f\u267b\u2668\u2666\u2665\u2663\u2660\u2653\u2652\u2651\u2650\u264f\u264e\u264d\u264c\u264b\u264a\u2649\u2648\u263a\u2639\u2615\u2614\u2611\u260e\u2601\u2600\u25fe\u25fd\u25fc\u25fb\u25c0\u25b6\u25ab\u25aa\u24c2\u231b\u231a\u21aa\u21a9\u2199\u2198\u2197\u2196\u2195\u2194\u2139\u2122\u2049\u203c\u00ae\u00a9])(?:\ufe0f|(?!\ufe0e))/g,
 
+    // avoid runtime RegExp creation for not so smart,
+    // not JIT based, and old browsers / engines
+    UFE0Fg = /\uFE0F/g,
+
     // used to find HTML special chars in attributes
     rescaper = /[&<>'"]/g,
 
@@ -312,9 +316,9 @@ var twemoji = (function (
    */
   function grabTheRightIcon(rawText) {
     // if variant is present as \uFE0F
-    return toCodePoint(/\u200D/.test(rawText) ?
-      rawText :
-      rawText.replace(/\uFE0F/g, '')
+    return toCodePoint(rawText.indexOf('\u200D') < 0 ?
+      rawText.replace(UFE0Fg, '') :
+      rawText
     );
   }
 

2/utils/create-dist

@@ -45,7 +45,7 @@ require('child_process').spawn(
   fs.writeFileSync(
     file('twemoji.min.js'),
     '/*! Copyright Twitter Inc. and other contributors. Licensed under MIT */\n' +
-    fs.readFileSync(file('twemoji.tmp.js'))
+    fs.readFileSync(file('twemoji.tmp.js')).toString().replace(/("|')\u200D\1/g, '$1\\u200D$1')
   );
   fs.unlink(file('twemoji.tmp.js'));
   // gzip -c twemoji.min.js | wc -c

2/utils/generate

@@ -643,6 +643,10 @@ function createTwemoji(re) {
         // http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
         re = /twemoji/,
 
+        // avoid runtime RegExp creation for not so smart,
+        // not JIT based, and old browsers / engines
+        UFE0Fg = /\uFE0F/g,
+
         // used to find HTML special chars in attributes
         rescaper = /[&<>'"]/g,
 
@@ -727,9 +731,9 @@ function createTwemoji(re) {
        */
       function grabTheRightIcon(rawText) {
         // if variant is present as \uFE0F
-        return toCodePoint(/\u200D/.test(rawText) ?
-          rawText :
-          rawText.replace(/\uFE0F/g, '')
+        return toCodePoint(rawText.indexOf('\u200D') < 0 ?
+          rawText.replace(UFE0Fg, '') :
+          rawText
         );
       }
 

package.json

@@ -1,5 +1,5 @@
 {
-  "version": "2.0.1",
+  "version": "2.0.2",
   "name": "twemoji",
   "license": ["MIT", "CC-BY-4.0"],
   "description": "A Unicode 8 standard based way to implement emoji across all platforms.",