Mail service providers apply stricter rules year by year to protect users from mail abuses like spam and spoofing.
In the meantime, we have seen an increasing number of troubling reports about mail delivery, and found that there are incorrectly configured contact forms behind that.
This article will explain some basics about form validation and then illustrate how to validate form fields using j Query.
There are two types of validation: client side validation and server side validation.
If you validate the form using j Query, you can notice this and alert the user to their mistake instead of submitting the form.
Java Script form validation is a great way to help your users avoid mistakes when filling out a form Alternatively, if you want to protect your server from malicious users, then you should use server side validation because Java Script can be easily bypassed.
It’s no surprise even if the same contact form doesn’t work in a different environment.
The validation process completes locally; any other services on Internet don’t get involved in this process. To get started, we'll create an HTML page that include a form with the id "contact". It should contain an label, an input (or textarea), and a span that will contain the error message.The form in HTML will look like this: tag improves usability.Clicking on the label will move the mouse cursor to the input with the id specified in the for attribute.The name of each input (or textarea) will be passed to the server to identify the contents of the form.