校驗身份證號的js方法

const checkUtil = {
	//身份證校驗
	creditNoCheck: function(code){
		//身份證號合法性驗證  
		//支持15位和18位身份證號  
		//支持地址編碼、出生日期、校驗位驗證  
		var city={11:"北京",12:"天津",13:"河北",14:"山西",15:"內蒙古",21:"遼寧",22:"吉林",23:"黑龍江 ",31:"上海",32:"江蘇",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山東",41:"河南",42:"湖北 ",43:"湖南",44:"廣東",45:"廣西",46:"海南",50:"重慶",51:"四川",52:"貴州",53:"雲南",54:"西藏 ",61:"陝西",62:"甘肅",63:"青海",64:"寧夏",65:"新疆",71:"臺灣",81:"香港",82:"澳門",91:"國外 "};  
		var row = true;
		var msg = "驗證成功";
		if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|[xX])$/.test(code))
		{  
			row=false,  
			msg = "被保人身份證號格式錯誤"; 
		}
		else if(!city[code.substr(0,2)])
		{  
			row=false,  
			msg = "被保人身份證號地址編碼錯誤";
		}
		else
		{  
			//18位身份證需要驗證最後一位校驗位  
			if(code.length == 18){  
				code = code.split('');  
				//∑(ai×Wi)(mod 11)  
				//加權因子  
				var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];  
				//校驗位  
				var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];  
				var sum = 0;  
				var ai = 0;  
				var wi = 0;  
				for (var i = 0; i < 17; i++)  
				{  
					ai = code[i];  
					wi = factor[i];  
					sum += ai * wi;  
				}  
				if(parity[sum % 11] != code[17].toUpperCase())
				{  
					row=false,  
					msg = "被保人身份證號校驗位錯誤";
				}  
			}  
		}  
		return row;  
	}
}
export default checkUtil;