Question

我需要通过表情符号替换;)或:p之类的文字，但我无法创建正则表达式来检测这一点。现在我只能检测:wink:

function replaceEmoticons(text) {
  var emots = {
    ";)": "wink",
    ":)": "xxx",
    ":p": "xxx", 

  };

  return text.replace(/:(.*?):/g, function (match) {
    return typeof emots[match] != 'undefined' ?
           '<img src="http://localhost:8080/'+emots[match]+'.png"/>' :
           match;
  });
}

对此有什么好的正则表达式？

Answer 1

请尝试以下操作。但是，在制作正则表达式时，您应该在表情符号中转义特殊字符（和）。

//帮助函数来转义正则表达式中的特殊字符

function RegExpEscape(text) {
    return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&"); 
}

function replaceEmoticons(text) {   
    var emoticons = {
        ':)'         : 'smile.gif',
        ':('         : 'sad.gif',
        ';)'         : 'wink.gif'


    }

    var result = text;
    var emotcode;
    var regex;

    for (emotcode in emoticons)
    {
        regex = new RegExp(RegExpEscape(emotcode), 'gi');
        result = result.replace(regex, function(match) {
            var pic = emots[match.toLowerCase()];

            if (pic != undefined) {
                return '<img src="' + pic + '"/>';
                    } else {
                return match;
                    }
                });
    }

    return result;    
}

Answer 2

此函数接受一个字符串并返回一个字符串，其中包含emots对象内的所有替换。

function replaceText(text) {
  var emots = {
    ";)": "wink",
    ":)": "xxx",
    ":p": "xxx", 
  };

  for(var key in emots){
    if(emots.hasOwnProperty(key)){
      text = text.replace(new RegExp(escapeRegExp(key), 'g'), '<img src="http://localhost:8080/' + emots[key] + '.png"/>');
    }
  }
  return text;
}

function escapeRegExp(str) {
  return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
}

Answer 3

我修改了AK1's answer并提供了一个示例。

＆＃13;

// Official Twitch robot emotes: https://twitchemotes.com
var emoticons = {
  ':)'   : 'ebf60cd72f7aa600',
  ':('   : 'd570c4b3b8d8fc4d',
  ':o'   : 'ae4e17f5b9624e2f',
  ':z'   : 'b9cbb6884788aa62',
  'B)'   : '2cde79cfe74c6169',
  ':\\'  : '374120835234cb29',
  ';)'   : '3407bf911ad2fd4a',
  ';p'   : '3407bf911ad2fd4a',
  ':p'   : 'e838e5e34d9f240c',
  'R)'   : '0536d670860bf733',
  'o_O'  : '8e128fa8dc1de29c',
  ':D'   : '9f2ac5d4b53913d7',
  '>('   : 'd31223e81104544a',
  '<3'   : '577ade91d46d7edc'
}
// Convert the emoticon map entries into their fully-qualified paths.
mapIdsToPaths(emoticons,
              'https://static-cdn.jtvnw.net/jtv_user_pictures/',
              'chansub-global-emoticon-',
              '24x18');

// Replace all possible emotes in each paragraph.
document.querySelectorAll('p').forEach(e => e.innerHTML = replaceEmoticons(e.innerHTML, emoticons));

function replaceEmoticons(text, emotes) {
   return Object.keys(emotes).reduce((result, emote) => {
      return result.replace(new RegExp(RegExpEscape(emote), 'gi'), function(match) {
        return (img => img != null ? '<img src="' + img + '"/>' : match)(emotes[match]);
      });
    }, text);
}

// helper function to escape special characters in regex
function RegExpEscape(text) {
  return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
}

// Map emote ids to their URLs.
function mapIdsToPaths(emotes, url, prefix, size) {
  Object.keys(emotes).forEach((id) => {
    emotes[id] = url + prefix + emotes[id] + '-' + size + '.png';
  });
}

＆＃13;

<p>Hello ;)<p>
<p>How are you :)?<p>
<p>o_O Today was not a good day... :(<p>

＆＃13;

Javascript正则表达式用表情符号替换文本

3 个答案: