Form java script using validating


17-Apr-2020 21:05

It is important to validate the form submitted by the user because it can have inappropriate values. The Java Script provides you the facility the validate the form on the client side so processing will be fast than server-side validation.So, most of the web developers prefer Java Script form validation.Through Java Script, we can validate name, password, email, date, mobile number etc fields.In this example, we are going to validate the name and password.Regular expression helps you in pattern matching in string. : Matches any single charcter except a new line : Matches the preceding character or repeated character. The basic expression for matching entered value as number in the field is: /^[0-9] $/.

escaping - by -) [0-9] : It matches digital number from 0-9. That means, you could be very sure about the form, whether users have entered the details or not.

Net pages, User and User along with the User Java Script file.

In the User page the user enters the form details and then only after validating the details the page is redirected to the User page.

To check, whether the user entered correct form of data, it’s must to apply form validation in any of the form. The expression is: /^[a-z A-Z] $/ The above expression checks whether the input characters in the string is alphabet or not.

Here I am giving you the form validation codes in Java Script. These are simple meta characters which do pattern matching. If the entered characters in the field is not in lower case or upper case. When it’s about checking contact field or zip code field, one need to check whether only the number have been entered or not.Now click on the "Create" button; it will redirect to the next page as in the following: Note For detailed code please download the zip file attached above.



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