Complex regex in AngularJS controller

Question

I am trying to add a regular expression in my AngularJS controller that validates the four following conditions in a text input box: A) name (space) name, B) name,(comma) name, C) 123456789 (max of 9 digits) D) 123-45-6789

I created the following regex: 1) validation: /^[a-zA-Z0-9 ,\-]+[(?<=\d\s]([a-zA-Z0-9]+\s)*[a-zA-Z0-9]+$ /,

This is close to what I want with the exception of formatting the last four digits and limiting digits to a max of nine characters.

I also tried combining the following regex per my research to no avail: 2) validation: /^([0-9]{8,9})$/ + /^([A-z'\/-])+[\s]+([A-z'\/-])+$/ + /^([A-z'\/-])+[\s]*[\,]{1}[\s]*([A-z-\/'])+$/ + /^\d{3}-\d{2}-\d{4}$/,

3) validation: /^([0-9]{8,9})$/ | /^([A-z'\/-])+[\s]+([A-z'\/-])+$/ | /^([A-z'\/-])+[\s]*[\,]{1}[\s]*([A-z-\/'])+$/ | /^\d{3}-\d{2}-\d{4}$/,

4) validation: new RegExp('(' + /^([0-9]{8,9})$/ + ") | (" + /^([A-z'\/-])+[\s]+([A-z'\/-])+$/ + ") | (" + /^([A-z'\/-])+[\s]*[\,]{1}[\s]*([A-z-\/'])+$/ + ") | (" + /^\d{3}-\d{2}-\d{4}$/ + ')'),

I have three questions:

• Is it possible to create one regex that validates these four conditions?

• Am I not combining these correct?

• Or should I abandon this regex mission and just create a separate function to perform my validation?

Answer 1

This should work for you: ^([a-zA-Z]+(?:-\/)?[,\/]?\s+[a-zA-Z]+(?:-\/)?|\d{1,9}|\d{3}-\d{2}-\d{4})$

const validate = input => /^^([a-zA-Z]+(?:-\/)?[,\/]?\s+[a-zA-Z]+(?:-\/)?|\d{1,9}|\d{3}-\d{2}-\d{4})$/.test(input)

const testData = ["123", "name space", "John Doe", "John/ Doe", "Doe, John", "John", "name, ", "John   Doe", "John-/   Doe", "John-/, Doe-/", "sdf", "123-45-6789", "1234567890" ,"name , surname"]
for (const input of  testData){
  console.log(`${input} ${validate(input)}`)
}

Answer 2

You could go for

^(?:(?:[a-z]+,?[ ]+[a-z]+)|(?:\d{3}-\d{2}-\d{4})|(?:\d+))$

See a demo on regex101.com.

---

Broken down, it reads:

^                          # match beginning of the line
(?:                        # non-capturing parenthesis
    (?:[a-z]+,?[ ]+[a-z]+) # a-z then comma (optional) space then a-z again
    |                      # or
    (?:\d{3}-\d{2}-\d{4})  # the number format with dashes
    |                      # or
    (?:\d+)                # only numbers
)
$                          # match the end of the line