Validate phone number with Yup?

I'm trying to validate a phone number with Yup:

phone: Yup.number()
  .typeError("That doesn't look like a phone number")
  .positive("A phone number can't start with a minus")
  .integer("A phone number can't include a decimal point")
  .min(8)
  .required('A phone number is required'),

.min(8) validates that the number is 8 or more. So simply entering 8 will pass. How can I make 8 characters required so 1000 0000 would pass?

Hi right now I'am solving same problem as you and I found possible solution.

Validate phone number with string that matches Regex

const phoneRegExp = /^((\\+[1-9]{1,4}[ \\-]*)|(\\([0-9]{2,3}\\)[ \\-]*)|([0-9]{2,4})[ \\-]*)*?[0-9]{3,4}?[ \\-]*[0-9]{3,4}?$/

phoneNumber: Yup.string().matches(phoneRegExp, 'Phone number is not valid')

You can search for different Regex Expressions and validate it. I've used Regex from this article https://www.sitepoint.com/community/t/phone-number-regular-expression-validation/2204

>. Update .<

http://yup-phone.js.org/

I've created a yup-phone module that uses google-libphonenumber which gives accurate validation checks and can be installed directly from github

npm install --save yup yup-phone.

Check Usage

const Yup = require('yup');
require('yup-phone');

// validate any phone number (defaults to India for country)
const phoneSchema = Yup.string().phone().required();
phoneSchema.isValid('9876543210'); // → true

---

---

From Simple React Validator,

The regex for phone number validation is

/^(\+?\d{0,4})?\s?-?\s?(\(?\d{3}\)?)\s?-?\s?(\(?\d{3}\)?)\s?-?\s?(\(?\d{4}\)?)?$/

Example

// index.js

const yup = require('yup');
const { rePhoneNumber } = require('./yup-phone')

const schema = yup.string().phone()

const phone = '+911234567890';
console.log('Is Valid? ', rePhoneNumber.test(phone)); // Is Valid? true
schema.validateSync(phone);

---

// yup-phone.js

const yup = require('yup');

const rePhoneNumber = /^(\+?\d{0,4})?\s?-?\s?(\(?\d{3}\)?)\s?-?\s?(\(?\d{3}\)?)\s?-?\s?(\(?\d{4}\)?)?$/;

module.exports.rePhoneNumber = rePhoneNumber

yup.addMethod(yup.string, "phone", function() {
  return this.test("phone", "Phone number is not valid", value =>
    rePhoneNumber.test(value)
  );
});

---

Try this, it might be helpful for you.

mobile: Yup.string().matches(/^[6-9]\d{9}$/, {message: "Please enter valid number.", excludeEmptyString: false})

const phoneRegExp = /^((\\+[1-9]{1,4}[ \\-]*)|(\\([0-9]{2,3}\\)[ \\-]*)|([0-9]{2,4})[ \\-]*)*?[0-9]{3,4}?[ \\-]*[0-9]{3,4}?$/


phone_number: Yup.string()
  .required("required")
  .matches(phoneRegExp, 'Phone number is not valid')
  .min(10, "to short")
  .max(10, "to long"),

This works best for me...you can set your own length...i just wanted 10 digits not less or more

Just a little collaboration. On my case I don't want to validate if the input is empty (when is not required). Thank you all for your examples!

yup.addMethod(yup.string, "phone", function(messageError = 'Phone number is not valid') {
    const phoneRegExp = /^((\\+[1-9]{1,4}[ \\-]*)|(\\([0-9]{2,3}\\)[ \\-]*)|([0-9]{2,4})[ \\-]*)*?[0-9]{3,4}?[ \\-]*[0-9]{3,4}?$/
    return this.test('phone', messageError, value => {
      if (value && value.length > 0) {
        return phoneRegExp.test(value)
      }
      return true
    })
})

I have a similar use case, and here's my solution:

// Regex source: https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch04s02.html

const phoneRegex = RegExp(
  /^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/
);

const schema = yup.object().shape({
  phone: yup.string().matches(phoneRegex, "Invalid phone").required("Phone is required")
});

Here's a snippet from my code.

let schema = yup.object().shape({
  phone: yup
    .string()
    // regexr.com/6anqd
    .matches(/(\+91\ )[6-9]{1}[0-9 ]{4}[0-9 ]{4}[0-9]{3}/, {
      message: "Invalid Indian number",
      excludeEmptyString: false,
    })
    .required(),
  email: yup.string().required().email(),
  password: yup.string().required().min(8),
  confirmPassword: yup
    .string()
    .required()
    .oneOf([yup.ref("password")], "Passwords do not match"),
  agree: yup
    .boolean()
    .oneOf(
      [true],
      "It is essential to accept our Privacy Policy to register.",
    ),
});

My regex checks for Indian Phone numbers following the format, +91 axxx xxx xxx (where a can be a digit in the range 6 to 9 and x can be 0 - 9).

I tried yup-home but it was not able to actually verify the range for the Indian Number I wanted, plus, the package import size was costly.

---

Also, I'm using React with Formik at the frontend for form validation with react-phone-input-2

<PhoneInput
  country={"in"}
  value={values.phone}
  name="phone"
  onChange={(phone, data, e) => handleChange(e)}
  onBlur={(e) => handleBlur(e)}
  defaultMask=".... ... ..."
  masks={{ in: ".... ... ..." }}
  onlyCountries={["in"]}
  inputProps={{
    name: "phone",
    required: true,
    autoFocus: true,
  }}
  disableSearchIcon={true}
  disableDropdown={true}
  containerClass="mt-1 border h-12 text-sm focus:outline-none block w-full bg-gray-100 dark:bg-transparent border-transparent focus:bg-white"
  inputClass="mt-1 border h-12 text-sm focus:outline-none block w-full bg-gray-100 dark:bg-transparent border-transparent focus:bg-white"
  inputStyle={{
    background: "transparent",
    border: "1px solid grey",
    height: "3em",
    width: "100%",
    outline: "none",
  }}
  buttonStyle={{
    height: "3em",
    background: "transparent",
    outline: "none",
    border: "none",
  }}
/>
{handleFormikError(errors, touched, "phone")} // returns the span.alert with error message

I made a new package for this called yup-phone-lite. I had used the original yup-phone package but it uses the massive google-libphonenumber so I replaced it with a smaller fork.