Using regular expressions in JavaScript to permit a particular phone number pattern of (123) 456-7890 exclusively

Question

Using regular expressions in JavaScript to permit a particular phone number pattern of (123) 456-7890 exclusively

I have implemented a phone number validation function for a web app. However, when this information is displayed in a windows app using a specific function that populates data to controls, it only accepts phone numbers in the format of (123) 456-7890.

(123) 456-7890

The current function allows users to enter any 10-digit phone number format, such as 123-45-6789.

function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');     

   if (fld.value == "") {
        return false;
    } else if (isNaN(parseInt(stripped))) {
        return false;
    } else if (!(stripped.length == 10)) {
        return false;
    } 
    return true;
}

I have researched online and found regular expressions for two formats (123) 456-7890 | 123-456-7890, such as (((\d{3}) ?)|(\d{3}-))?\d{3}-\d{4}. However, I need to restrict the validation to only one format with parentheses. Is there a way to modify this function to validate phone numbers in the exact format shown above? Thank you in advance.

javascript regex

Answer 1

Answer №1

Feel free to experiment with the regex pattern below:

const regexPattern = /^\(\d{3}\) \d{3}-\d{4}$/;
console.log(regexPattern.test("(123) 456-7890")); // true
console.log(regexPattern.test("123-456-7890")); // false

Answer 2

Feel free to experiment with the regex pattern below:

const regexPattern = /^\(\d{3}\) \d{3}-\d{4}$/;
console.log(regexPattern.test("(123) 456-7890")); // true
console.log(regexPattern.test("123-456-7890")); // false

Answer 3

Answer №2

Check out the regular expression provided below to validate a phone number

const validNumber = "(123) 456-7890";
const invalidNumber = "1234567890";
const regEx = /^\(\d{3}\) \d{3}-\d{4}$/;
console.log(
  regEx.test(validNumber),
  regEx.test(invalidNumber)
);

Answer 4

Check out the regular expression provided below to validate a phone number

const validNumber = "(123) 456-7890";
const invalidNumber = "1234567890";
const regEx = /^\(\d{3}\) \d{3}-\d{4}$/;
console.log(
  regEx.test(validNumber),
  regEx.test(invalidNumber)
);

Using regular expressions in JavaScript to permit a particular phone number pattern of (123) 456-7890 exclusively

Answer №1

Answer №2

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