How do you modify the default validation message styles in Blazor?

You can use the following CSS classes to apply your own styles to validation messages. CSS class name  Added DOM element  valid/invalid  Added to the <input> element of DOM  validation-errors  Added to the dynamically created <ul> element while using the <ValidationSummary> tag  validation-message  Added to the dynamically created <div> / <li> element which holds to error message.  <div> – created while using <ValidationMessage> tag <li> – created while using <ValidationSummary> tag  modified  Added to the <input> element after modifying the default value. 

How do you validate forms in Blazor?

The form validation in Blazor is achieved using data annotations. The following two tags are used for validations and display the validation error message: <DataAnnotationsValidator /> <ValidationSummary /> Refer to the following code example for simple form validation in Blazor. [Person.cs] [FormValidation.razor]