On the final line we call test method for our regular expression and pass the email address as input.
If the input email address satisfies our regular expression, ‘test’ will return true otherwise it will return false. You can call this method whenever you want to validate email address.
We want to make filling out web forms as easy as possible. There are three main reasons: In the real world, developers tend to use a combination of client-side and server-side validation.
One of the features of HTML5 is the ability to validate most user data without relying on scripts.
Having a-z and A-Z means that both lowercase and uppercase letters are allowed.If the information is correct, the application allows the data to be submitted to the server and (usually) saved in a database; if the information isn't correct, it gives you an error message explaining what needs to be corrected.Form validation can be implemented in a number of different ways..[A-Z]/igm //reported to validate incorrectly: [email protected]@ as true /[A-Z0-9._% -] @[A-Z0-9.-] .[A-Z]/igm //current version /^(([^Sam Deering has 15 years of programming and website development experience.He was a website consultant at Console, ABC News, Flight Centre, Sapient Nitro, and the QLD Government and runs a tech blog with over 1 million views per month.
If the argument is the empty string, the custom error is cleared.