This was really a lengthy process which used to put a lot of burden on the server.
Java Script provides a way to validate form's data on the client's computer before sending it to the web server. First let us see how to do a basic form validation.
It happens sometimes, when user forgets to choose option from the select feild.
In that case, the form should convey about issue so that user can take the action.
Now we will see how we can validate our entered form data before submitting it to the web server.
The sequence is defined as: [alphabets/numbers/underscore/plus [email protected]/numbers/periods.domain name] If the entered email address is not in a proper sequence, then the message will popup which says “Wrong Email Address”.
So, just to make sure that user entered the email address in the correct format, it’s necessary to include email validation code inside the validation codes.
A general expression to check valid email address is: /^[w-.
When setting options via HTML attributes, remember to enable the validator by setting data-fv-integer="true".
You don't need to do that when i) using HTML 5 type="number" attribute, ii) and the step attribute is not specified, or its value is an integer The thousands and decimal separators might take different value in certain countries.