javascript unicode emoji regular expressions

Question

i want to replace all emoji in string with icon now i successfully replaced those {:) :D :P :3 <3 XP .... etc} to icon so if user write :) thi

Answer 1

In ECMAScript 6 you should be able to detect it in a fairly simple way. I have compiled a simple regex comprising of different Unicode blocks namely:

• Miscellaneous Symbols and Pictographs
• Supplemental Symbols and Pictographs
• Emoticons
• Transport and Map Symbols
• Miscellaneous Symbols
• Dingbats
• Regional indicator symbol

Regex:

/[\u{1f300}-\u{1f5ff}\u{1f900}-\u{1f9ff}\u{1f600}-\u{1f64f}\u{1f680}-\u{1f6ff}\u{2600}-\u{26ff}\u{2700}-\u{27bf}\u{1f1e6}-\u{1f1ff}\u{1f191}-\u{1f251}\u{1f004}\u{1f0cf}\u{1f170}-\u{1f171}\u{1f17e}-\u{1f17f}\u{1f18e}\u{3030}\u{2b50}\u{2b55}\u{2934}-\u{2935}\u{2b05}-\u{2b07}\u{2b1b}-\u{2b1c}\u{3297}\u{3299}\u{303d}\u{00a9}\u{00ae}\u{2122}\u{23f3}\u{24c2}\u{23e9}-\u{23ef}\u{25b6}\u{23f8}-\u{23fa}]/ug

Playground: play around with emoji and regex

This answer doesn't directly answer the question but gives a fair insight on how to handle emoji using Unicode blocks and ES6.

Answer 2

Note - The below regex will match surrogate pairs (Supplemental), as well as single (Basic).

To see the hex version of what matched:
If the length of the match is 2, character 1 is a low surrogate, character 2 is a high surrogate. Just format each character to hex, and join them in a string.

You could try to match some emoji via hex ranges.

This regex matches these 1,114 emoji characters.

Note - this excludes characters in the range \x00-\x7f; for some reason there are emoji in this range like 0-9.. (using \p{Emoji=yes}).

The below regex will match these emoji.

©®‼⁉™ℹ↔↕↖↗↘↙↩↪⌚⌛⌨⏏⏩⏪⏫⏬⏭⏮⏯⏰⏱⏲⏳⏸⏹⏺Ⓜ▪▫▶◀◻◼◽◾☀☁☂☃☄☎☑☔☕☘☝☠☢☣☦☪☮☯☸
☹☺♀♂♈♉♊♋♌♍♎♏♐♑♒♓♠♣♥♦♨♻♿⚒⚓⚔⚕⚖⚗⚙⚛⚜⚠⚡⚪⚫⚰⚱⚽⚾⛄⛅⛈⛎⛏⛑⛓⛔⛩⛪⛰⛱⛲⛳⛴⛵⛷⛸⛹⛺
⛽✂✅✈✉✊✋✌✍✏✒✔✖✝✡✨✳✴❄❇❌❎❓❔❕❗❣❤➕➖➗➡➰➿⤴⤵⬅⬆⬇⬛⬜⭐⭕〰〽㊗㊙                                                                    

                                                        
            

Answer 3

You can change to \U characters with below function.

var emojiToUnicode=function (message){
    var emojiRegexp = /([\uE000-\uF8FF]|\uD83C[\uDC00-\uDFFF]|\uD83D[\uDC00-\uDFFF]|[\u2694-\u2697]|\uD83E[\uDD10-\uDD5D])/g;
    if(!message)
        return;
    try{ 
        var newMessage = message.match(emojiRegexp);
        for(var emoj in newMessage){
              var emojmessage = newMessage[emoj];
              var index = message.indexOf(emojmessage);
              if(index === -1)
                  continue;
              emojmessage = "\\u" + emojmessage.charCodeAt(0).toString(16) + "\\u" + emojmessage.charCodeAt(1).toString(16);
              message = message.substr(0, index) + emojmessage + message.substr(index + 2);
            }
        return message;
    }catch(err){
        console.error("error in emojiToUnicode"+err.stack);
    }
 };

Answer 4

A lot of these patterns do match many of the emoji "letters", but don't match compound Modifier Sequences correctly (all as one group). There will be way more matches than there are actual emojis.

For example:

"