checkBaseFormat(id)

Validate the basic format of an ID number (length and characters).

Signature

function checkBaseFormat(id: string): boolean

Parameters

Parameter	Type	Description
id	string	ID number

Returns

Returns true if the format is correct (15 digits, or 17 digits + an optional trailing X), false otherwise.

Live Demo

Example

import { checkBaseFormat } from 'china-id-card'

checkBaseFormat('622922197808118498') // → true
checkBaseFormat('110101900101001')   // → true (15-digit)
checkBaseFormat('12345')             // → false