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Overview

The ASP.NET Core Blazor Form Validation is a library for validating HTML form input elements before submitting them to a server. It has 14 built-in validation rules such as required, email, URL, date, and more, along with support for writing custom validation logic and HTML5 data attribute validation.


Validate using HTML5 data attributes

The HTML5 form element’s data attributes can be used to define validation rules and error messages for the Form Validation library. This facilitates clean and reusable HTML forms.

validate html5 data attributes using form validation


Validation error messages

The Form Validation library provides meaningful validation error messages when the expected validation rule isn’t followed by the input value. This validation plugin itself has options for customizing both the validation message’s placement and its content.

Customize error messages

Define and customize validation error messages for individual form elements, entire forms, or for an entire application. This enables you to set custom error messages instead of being limited to built-in validation error messages.

Custom error placement

Summarize error messages and place them in custom locations. This option is useful for taking a validation message from a default location and moving it to any custom location in the application.


Other supported frameworks

The Blazor Form Validation library is also available in Angular, JavaScript frameworks.


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