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Then I created a variable that contains the result of running the test() function on the phone Number string which will be a boolean that contain either true if the string matches our regular expression or false if it does not.Now let’s jump into the fun part which is discussing the regular expression First we have the starting and ending slashes “/” , the expression then starts with a “^” sign to match with the beginning of the string.
Now let’s jump to the regular expression itself: UK postal code examples : EC1A 1BB W1A 0AX M1 1AE B33 8TH CR2 6XH DN55 1PT So, 1 or 2 alphabetic characters, followed by 1 or 2 digits, then a space and one digit and exactly two alphabetic characters.
So here is the Regular expression pattern:/^[A-Z][0-9] ?
I've found plenty, but it turns out that most of them appear on the surface to be fine, but in reality they don't actually work, like this one: As you can see, this phone validation routine is no good.
So, I decided to come up with my own expression that could, as best as possible handle phone number in Australian format, firstly, but in formats from international numbers wherever possible too.
In today’s post I’ll show you how to use Java Script regular expression to validate U. In the method body we define a variable (‘phone Number Pattern’) and assign a regular expression to it.
Phone Number format: The regular expression for phone number is : Finally, the phone number must end with four digits.
Here I have added a new variable called postal Code to fetch the postal code from the form then created another variable to store the postal code regular expression which we will be discussing in a second.
Then I used the test function to test my string against the regular expression and print the result in an alert.
Through a list of examples , we will build a script to validate phone numbers , UK postal codes, along with more examples.
First, let’s start by building the webpage and the validation code then we will talk about the regular expressions used to validate the strings.