js-判断字符串中是否存在emoji表情

 function isEmojiCharacter(substring) {
                 for(var i = 0; i < substring.length; i++) {
                     var hs = substring.charCodeAt(i);
                     if(0xd800 <= hs && hs <= 0xdbff) {
                         if(substring.length > 1) {
                             var ls = substring.charCodeAt(i + 1);
                             var uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                             if(0x1d000 <= uc && uc <= 0x1f77f) {
                                 return true;
                             }
                         }
                     } else if(substring.length > 1) {
                         var ls = substring.charCodeAt(i + 1);
                         if(ls == 0x20e3) {
                             return true;
                         }
                     } else {
                         if(0x2100 <= hs && hs <= 0x27ff) {
                             return true;
                         } else if(0x2B05 <= hs && hs <= 0x2b07) {
                             return true;
                         } else if(0x2934 <= hs && hs <= 0x2935) {
                             return true;
                         } else if(0x3297 <= hs && hs <= 0x3299) {
                             return true;
                         } else if(hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 ||
                             hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b ||
                             hs == 0x2b50) {
                             return true;
                         }
                     }
                 }
             }