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Feb 28, 2022 · This tutorial describes the directives and techniques to use when writing templates. You can also use a reactive or model-driven approach to build forms. Template-driven forms are suitable for small or simple forms, while reactive forms are more scalable and suitable for complex forms. For a comparison of the two approaches, see Introduction to ...
Sep 7, 2023 · Angular provides two different approaches to handling user input through forms: reactive and template-driven. Both capture user input events from the view, validate the user input, create a form model and data model to update, and provide a way to track changes.
Validating form input. You can improve overall data quality by validating user input for accuracy and completeness. This page shows how to validate user input from the UI and display useful validation messages, in both reactive and template-driven forms.
Sep 8, 2023 · Reactive forms provide a model-driven approach to handling form inputs whose values change over time. This guide shows you how to create and update a basic form control, progress to using multiple controls in a group, validate form values, and create dynamic forms where you can add or remove controls at run time.
Template-driven forms. You can build forms by writing templates in the Angular template syntax with the form-specific directives and techniques described in this page.
Aug 30, 2023 · To make it faster and easier to generate different versions of such a form, you can create a dynamic form template based on metadata that describes the business object model. Then, use the template to generate new forms automatically, according to changes in the data model.
Angular forms allow you to: Capture the current value and validation status of a form. Track and listen for changes to the form's data model. Validate the correctness of user input. Create custom validators and input elements. You can build forms in one of two ways: Reactive forms use existing instances of a FormControl or FormGroup to build a ...
The following example shows you how to combine controls together in a sub-group of the form. selector: 'example-app', template: `. <form #f="ngForm" (ngSubmit)="onSubmit(f)">. <p *ngIf="nameCtrl.invalid">Name is invalid.</p>. <div ngModelGroup="name" #nameCtrl="ngModelGroup">.
Directives are classes that add additional behavior to elements in your Angular applications. Use Angular's built-in directives to manage forms, lists, styles, and what users see.
In template driven forms, all <form> tags are automatically tagged as NgForm. To import the FormsModule but skip its usage in some forms, for example, to use native HTML5 validation, add the ngNoForm and the <form> tags won't create an NgForm directive.
