Java script validating form

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This wont be perfect validation it is possible to slip not compliant addresses by it but it's normally good enough.validate Phone ( ) The function below checks if the phone number is valid.At last we check the length of the string and permit only phone numbers with 10 digits. When the user clicks the Submit button on the form, the form data is sent to a Java Script validation function that checks each field to make sure that it is in the appropriate format.Java Script is one of the most popular languages in Full-Stack, Front-end, and Back-end Development.validate Email ( ) Next we want to see if the email address the user entered is real.This means that the input data must contain at least an @ sign and a dot (.).

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If the required field is blank, we return the error string to the main function.If you run a validation of the users form input before the form is submitted, there will be no wait time and redundant load on the server."Bad data" are already filtered out when input is passed to the server-based program. Client side form validation usually done with javascript.Any interactive web site has form input - a place where the users input different kind of information.This data is passed to ASP script, or some other technology and if the data contains an error, there will be a delay before the information travels over the Internet to the server, is examined on the server, and then returns to the user along with an error message.

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