js 校驗文字中是否存在emoji

/**
 * 校驗文字中是否存在表情  存在 return true
 */
function isEmojiCharacterIndex(substring) {
	if (substring) {
		var flag = false;
		var index = -1;
		for (var i = 0; i < substring.length; i++) {
			var hs = substring.charCodeAt(i);
			console.log(hs, 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) {
						flag = true;
						index = i;
						break;
					}
				}
			} else if (substring.length > 1) {
				var ls = substring.charCodeAt(i + 1);
				if (ls == 0x20e3) {
					flag = true;
					index = i;
					break;
				}
			} else {
				if (0x2100 <= hs && hs <= 0x27ff) {
					flag = true;
					index = i;
					break;
				} else if (0x2B05 <= hs && hs <= 0x2b07) {
					flag = true;
					index = i;
					break;
				} else if (0x2934 <= hs && hs <= 0x2935) {
					flag = true;
					index = i;
					break;
				} else if (0x3297 <= hs && hs <= 0x3299) {
					flag = true;
					index = i;
					break;
				} else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 ||
					hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b ||
					hs == 0x2b50) {
					flag = true;
					index = i;
					break;
				}
			}

		}
		return index;
	}
};

/**
 * 根據index 截取對應表情
 */
function subToIndex(index, str) {
	console.log(index)
	var res = str.substring(0, index)
	res += str.substring(index + 2, str.length)
	console.log(res)
	return res;
}

/**
 * 外部調用
 */
function isEmojiCharacter(str) {
	var str_ = str;
	var flag = false;
	var msg = {};
	var regStr =
		/[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF][\u200D|\uFE0F]|[\uD83C|\uD83D|\uD83E][\uDC00-\uDFFF]|[0-9|*|#]\uFE0F\u20E3|[0-9|#]\u20E3|[\u203C-\u3299]\uFE0F\u200D|[\u203C-\u3299]\uFE0F|[\u2122-\u2B55]|\u303D|[\A9|\AE]\u3030|\uA9|\uAE|\u3030/ig;
	if (regStr.test(str_)) {
		str_ = str_.replace(regStr, "");
		msg.data = str_;
		msg.res = true;
		return msg;
	}
	// 利用死循環 將每一個表情剔除
	for (var i = 0; i < 1 + i; i++) {
		var index = isEmojiCharacterIndex(str_);
		if (index > -1) {
			flag = true;
			str_ = subToIndex(index, str_);
		} else {
			break;
		}
	}
	msg.data = str_;
	msg.res = flag;
	return msg;
}

 

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