Validation is the process of checking whether the information provided by the front-end user is correct or not as per the requirements. If the data provided by the client was incorrect or missing, then the server will have to send that data back to the client and request for resubmitting the form with the correct information.
Generally, the validation process is done at the server-side, which sends that validation information to the front-end user. This process wastes the execution time and user time.
Let us try to elaborate on the basic form validation and data format validation.
Basic Form Validation
It validates the mandatory input fields of the form, whether the required fields are filled or not.
Let us understand the process of basic form validation by using the following example.
Data Format Validation
In data format validation, there is the checking of the entered data for the correct value. It validates already filled input fields that whether the filled information is correct or not.
Let's understand the concept of data format validation with the following example.