检测输入的字符串是否是新版身份证号码

isIdCard.js

const WEIGHT_MAP = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
const INSPECT_MAP = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']

/**
 * [isIdCard description]
 * @param  {String}  idCard 身份证字符串
 * @return {Boolean} 
 */
export default function isIdCard(idCard) {
    if (!idCard || typeof idCard !== 'string' || idCard.length < 18) return false
    
    let ids = idCard.split('')
    let sum = 0
    for (let i = 0; i < 17; i++) {
        sum += (+ids[i] * WEIGHT_MAP[i])
    }
    let inspect = INSPECT_MAP[sum % 11]

    return inspect === ids[17]
}