Front-end Validation
Discover how to apply front-end validation in PHP applications using HTML5 and JavaScript. Learn to provide instant feedback on user input by handling input events and applying rules with regex. This lesson helps you improve form usability and data accuracy with practical examples and user-friendly techniques.
We'll cover the following...
Frontend or client-side validation is the process of alerting the user about issues in the form before they send it ahead to the server. This process provides a great user experience in our application because the user is immediately made aware of any problematic data. Such a validation process helps save money and resources as well.
The validation is carried out with built-in HTML5 features as well as JavaScript for any customization purposes. These might include customizing the validation or performing complex validation procedures. So, we will focus on JavaScript form validations in this lesson.
The form
First things first, let’s create a basic form.
Our form has three required input fields. For a better user experience, we’ve added the rules that must be followed by the user.
Now what we want to do is set the font color in such a way that it defaults to red when the current ...