When and how to validate forms in a usability perspective?

1. Why is it important to validate the content in a form?
2. How do you validate a form in HTML?
3. What is inline validation UX?

Why is it important to validate the content in a form?

Why is Form Validation Needed? Form validation is required to prevent online form abuse by malicious users. Improper validation of form data is one of the main causes of security vulnerabilities. It exposes your website to attacks such as header injections, cross-site scripting, and SQL injections.

How do you validate a form in HTML?

To validate the form using HTML, we will use HTML <input> required attribute. The <input> required attribute is a Boolean attribute that is used to specify the input element must be filled out before submitting the Form.

What is inline validation UX?

In short, inline validation is an effort on behalf of the form to help users correct information as they go, ideally so that when the point comes to submit the form, they are more likely to submit it on the first attempt. The more failed attempts a user makes to submit the form, the more likely they are to give up.