17 lines
518 B
JavaScript
17 lines
518 B
JavaScript
function checkIdCard (idCardNumber) {
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if (!idCardNumber || typeof idCardNumber !== 'string' || idCardNumber.length !== 18) return false
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const coefficient = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
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const checkCode = [1, 0, 'x', 9, 8, 7, 6, 5, 4, 3, 2]
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const code = idCardNumber.substring(17)
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let sum = 0
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for (let i = 0; i < 17; i++) {
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sum += Number(idCardNumber.charAt(i)) * coefficient[i]
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}
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return checkCode[sum % 11].toString() === code.toLowerCase()
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}
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export default checkIdCard
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