parse-ssn

Tiny toolkit to format, mask, and validate US Social Security numbers.

npm i parse-ssn

Usage

mask(value: string[, placeholder = '*']): string

import { mask } from 'parse-ssn'
 
mask('123121234') // => *****1234
mask('123121234', '#') // => #####1234

format(value: string[, separator = '-', existingPlaceholder = '*']): string

import { format } from 'parse-ssn'
 
format('123121234') // => 123-12-1234
format('123121234', ' ') // => 123 12 1234

Compose methods for additional flexibility:

import { format, mask } from 'parse-ssn'
 
const masked = mask('123121234') // => *****1234
const formatted = format(masked) // => ***-**-1234

When dealing with formatting of masks that use an existing placeholder other than *, you need to pass additional information about the format.

import { format } from 'parse-ssn'
 
format('#####1234', '-', '#') // => ###-##-1234

validate(value: string): boolean

Validation is based on information gathered from the Social Security Administration's website. If an edge case is missing, please open an issue.

import { validate } from 'parse-ssn'
 
validate('123121234') // => true

clean(value: string, exception = ''): string

By default, clean strips out all characters except numbers, and trims the string to nine characters. You probably want to use this first before mask or format.

import { clean } from 'parse-ssn'
 
clean('123-12-1234') // => 123121234
clean(' 123 12-1234') // => 123121234
clean('123-12-1234-12345') // => 123121234

To clean a string that may be masked, pass an exception.

import { clean } from 'parse-ssn'
 
clean('*****1234', '*') // => *****1234

License

MIT License © Truework