Any interactive web site has form input - a place where the users input different kind of information.
We want to allow only letters, numbers and underscopes.
validate Password ( ) The function below checks the password field for blankness and allow only letters and numbers - no underscopes this time.
For the sake of demonstration, we have taken five countries only. CSS Code of the Sample Registration Form The code above checks whether a sex is selected. If Male or Female is selected, it generates an alert saying that the form is successfully submitted and it reloads the form.
Flowchart: Here is the entire Java Script used for validation of the form.
Like no other form validation library, simply write in English your requirements inside your form HTML tags, Parsley will do the rest!
No need to write even a single Java Script line for simple form validation.
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.
It sets the focus to the input field until the user supplies a valid value.