Forms frequently include required input that needs to be clearly identified using labels.HTML5 input types are displayed as simple input fields in older web browsers that do not support these HTML5 features.The example below shows these HTML5 input types in action.In addition to providing instructions, validate user input to help users avoid mistakes.HTML5 defines a range of built-in functionality to validate common types of input, such as email addresses and dates.(Create MVC Application) Create new project and select ASP. In the code given below, just specify your Controllername in your Contoller and specify an actionmethod name in an action. Click Validate button to get the length of textbox input. Email Validation Here, we may use Reg Ex to validate the input whether that is a valid E-mail or not. Here, we have a predefined functionality called to Upper Case. Update Route Config Update routeconfig to set Index an actionmethod as homepage. There has a predefined function called Now, run your Application and give some input in textbox. Here, we are going to use the keyupevent to the respective textbox to perform uppercase functionality.These dialogs are expected to respect the settings and preferences of the user in the web browser (and operating system), such as default font-size, colors, and language.In the example below, the attribute is added to the input field.This means that validation needs to be carried out server-side as well.Where possible, users should be able to check their input and correct it if necessary.