25 lines
1.3 KiB
Markdown
25 lines
1.3 KiB
Markdown
Implements a set of directives and providers to communicate with native DOM elements when building forms
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to capture user input.
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Use this API to register directives, build form and data models, and provide validation to your forms. Validators can
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be synchronous or asynchronous depending on your use case. You can also extend the built-in functionality
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provided by forms in Angular by using the interfaces and tokens to create custom validators and input elements.
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Angular forms allow you to:
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* Capture the current value and validation status of a form.
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* Track and listen for changes to the form's data model.
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* Validate the correctness of user input.
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* Create custom validators and input elements.
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You can build forms in one of two ways:
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* *Reactive forms* use existing instances of a `FormControl` or `FormGroup` to build a form model. This form
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model is synced with form input elements through directives to track and communicate changes back to the form model. Changes
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to the value and status of the controls are provided as observables.
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* *Template-driven forms* rely on directives such as `NgModel` and `NgModelGroup` create the form model for you,
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so any changes to the form are communicated through the template.
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@see Find out more in the [Forms Overview](guide/forms-overview).
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