js判断用户是否输入emoji表情

/**
 * @description:  只能判断是否输入emoji表情，不能执行replace或提取具体表情符号
 */
export const isEmojiCharacter = (substring) => {
  for (var i = 0; i < substring.length; i++) {
    var hs = substring.charCodeAt(i)
    if (hs >= 0xd800 && hs <= 0xdbff) {
      if (substring.length > 1) {
        var ls = substring.charCodeAt(i + 1)
        var uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000
        if (uc >= 0x1d000 && uc <= 0x1f77f) {
          return true
        }
      }
    } else if (substring.length > 1) {
      var a = substring.charCodeAt(i + 1)
      if (a === 0x20e3) {
        return true
      }
    } else {
      if (hs >= 0x2100 && hs <= 0x27ff) {
        return true
      } else if (hs >= 0x2B05 && hs <= 0x2b07) {
        return true
      } else if (hs >= 0x2934 && hs <= 0x2935) {
        return true
      } else if (hs >= 0x3297 && hs <= 0x3299) {
        return true
      } else if (hs === 0xa9 || hs === 0xae || hs === 0x303d || hs === 0x3030 ||
                  hs === 0x2b55 || hs === 0x2b1c || hs === 0x2b1b ||
                  hs === 0x2b50) {
        return true
      }
    }
  }
}