When we visit a website, there are possibilities that we get to see a form. A website consists of various forms, and some of the very important forms are registration and login forms. In these forms, it is very important to make sure that the data inserted by the user is valid and acceptable.
Inserting wrong and invalid information in the input fields must give the user a message. It is not always necessary that you need to validate the input fields for wrong content from the server. There are sometimes cases in which the user forgets to fill in certain input fields. When the fields are not complete, your form will not be submitted, and no action will be performed. That is why programmers do the input validation of web forms using different methods, including regular expressions or regex.
Keep scrolling down the article to know more about form validation, its importance, and its common types.
Top 2 Types of Form Validation in Websites
The data a user enters in an input field are checked on two sides. One is on the client-side, and the other is on the server-side. Checking on both sides ensures that the data entered by the user is valid. Such validations help users and the websites to improve secure logins and check-ins.
Below are the most common types of form validation.
1. Server-side validation
We call this type of validation after submit validation also. Usually, this type of validation happens on a server-side. When a user fills in a form and clicks a submit or send button, the information entered is sent to the server. From the server, the data is compared with the correct one already existing in the database. If the entered data is incorrect, the user gets an error message. Such validations are important for guiding the user and securing users’ access to a website. Hire a web development company in Dubai to develop a website with validated web forms and secure websites.
2. Client-side validation
Usually, this type of validation happens in a limited time as compared to server-side validation. We call this validation inline input validation because the input fields show an error message as soon as the user enters the wrong information. You might have noticed while logging in to your email that whenever you insert wrong, it shows an “email does not exist” message. A user can correct the error straight away without waiting for a response from a server.
The following are two types of client-side form validation.
a. Built-in Form validation
HTML is also one of the best ways to validate input forms. There is less participation of JavaScript when we talk about built-in form validations. HTML 5 includes built-in features with the help of which you can validate forms efficiently. These are not customizable like JavaScript validation.
b. JavaScript
With JavaScript, you can do many things. One of the most important things you can do with JS is form validation. There are a number of JavaScript libraries that you can include in your code for injecting form validation; Another way of doing it is through code.
Top 3 Checklists For Form Validation
There are a number of things and essential elements of a website to make them work perfectly. One of the elements is the values a user inserts in the input fields. There are different types of inputs a user can insert. A website needs to check for each type of inputs entered by the user.
Below are the three types of data/ input checklists you need to validate.
1. Data type
There are different types of data that you can insert into an input field. It could either be a number, a string, or a character. The data type validation will help the user to input the right type of data in the input field. For example, you will not be able to put numbers only in your email input field.
2. Data size
There is always a size o the data you will be entering into the input field. For example, if the input fields ask for an integer number, the data size validation will check whether the inserted data is too large to be an integer or is it correct.
3. Data range
Some values are already expected, and their length and range are fixed. Any values exceeding or lower than the expected range will be considered incorrect. For example, the zip code for a region will have a fixed number of figures and values. This type of validation is achieved by data range validation.
Make your website and its information secure!
One of the main reasons for input or form validation is to provide security to the information provided by the user. Using validation methods, you can make sure that the passwords entered by the user are strong enough. Make sure the website you develop has forms validated and developed by expert web development companies.
