对输入框是否输入了表情包做判断

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;
          }
        }
      }
    };