Regular expression for validating phone number in javascript

The demo below , uses a function to check if value in the form field is empty or null.A simple six digit zipcode can be checked using regular expression which matches exactly six digits : /^d$/ Another way can be /^[0-9][0-9][0-9][0-9][0-9][0-9]$/ , for zipcode with dash in between it can be /^\d-? There may be some form fields whose values must be strictly alphabetic characters, eg: Name, Country, State.See the JDK Documentation on regex to learn more about using regular expressions in Java.Using this package I created a utility class to validate some commonly used data elements.Unwanted parentheses surrounding area codes or telephone numbers, can be removed using regular expression and method replace() The regular expression searches for one or more parentheses, spaces or dashes , globally.An USA phone number has ten digits, it comprises of : a three digit area code, subscriber number of seven digit. : To check username consists of one or more dashes or word characters grouped by parentheses, followed by a literal period. ) : username can consists of more than one set of word characters seperated by a single dots.This is done using a Javascript program on the client side, the Javascript program uses a regular expression pattern to test the input of each form field.

The regular expressions used to differentiate between various phone number types consume a lot of space (two thirds of the total size of the doesn't actually exist in Germany.Regular expressions can also be used to validate that the input conforms to a given format.For example, we can use Regular Expression to check whether the user input is a valid Social Security number, a valid phone number or a valid email number, etc.As a simple example, let’s assume we need to test a string to confirm it is in the format of a phone number.Phone numbers vary greatly across continents so let’s use the typical UK mobile number as an example: Mobile phone numbers in the UK will usually be in the following format (d = digit): shortcuts available in regex, and in this instance they’re called "shorthand character classes".Regular Expressions offer a concise and powerful search-and-replace mechanism.

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