Template-driven form validation for Angular

Description

This library is aimed to add reactive form validation for a template-driven form. It allows invoking action only for valid form, skipping manual validation. Validation rules could be changed on the fly by accessing ValidationService methods.

Main concept

Errors

There are two types of errors:

• control error (produced by AbstractControl validation pipeline);
• form error (non-validation error that relates on form action and is stored in ErrorCollection @see ErrorObservingService).

Context

Validation context defines rules for a set of fields. You can think of a form as a set of contexts. Each form provides several contexts for different purposes for "Check" and "Validation item" directives:

• Local context (disposable context for every form that can be populated with errors);
• Named context (widely used context that has a name and can be populated from outside using ValidationService API).

There also exists an additional context that is used for semantic validation (When you need to check several fields of a FormGroup at once).

Usage

Take a look at examples in playground/ngx-form-validation.

Building

To build the library, run:

ng build ngx-form-validation

This command will compile your project, and the build artifacts will be placed in the dist/ directory.