js 校验文字中是否存在emoji

谁践踏了优雅 2022-02-02 10:41 626阅读 0赞

/**
     * 校验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;
    	}
    };
    
    /**
     * 根据index 截取对应表情
     */
    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;
    }
    
    /**
     * 外部调用
     */
    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;
    	}
    	// 利用死循环 将每一个表情剔除
    	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;
    }