René's URL Explorer Experiment


Title: Validate form input • Angular

Open Graph Title: Validate form input • Angular

X Title: Validate form input • Angular

Description: The web development framework for building modern apps.

Open Graph Description: The web development framework for building modern apps.

X Description: The web development framework for building modern apps.

Keywords:

Opengraph URL: https://angular.dev/

X: @Angular

direct link

Domain: angular.dev

authorAngular Team
apple-mobile-web-app-titleAngular
application-nameAngular
msapplication-TileColor#e90464
msapplication-config/assets/icons/browserconfig.xml
theme-color#ffffff
og:typewebsite
og:imagehttps://angular.dev/assets/images/ng-image.jpg
twitter:creator@Angular
twitter:cardsummary_large_image
twitter:urlhttps://angular.dev/
twitter:imagehttps://angular.dev/assets/images/ng-image.jpg

Links:

https://angular.dev/
Docshttps://angular.dev/docs
Tutorialshttps://angular.dev/tutorials
Playgroundhttps://angular.dev/playground
Referencehttps://angular.dev/reference
What is Angular? https://angular.dev/overview
Installation https://angular.dev/installation
Start coding! 🚀 https://angular.dev/tutorials/learn-angular
Drag and drop https://angular.dev/guide/drag-drop
Get Started https://angular.dev/ai
LLM prompts and AI IDE setup https://angular.dev/ai/develop-with-ai
Design Patterns https://angular.dev/ai/design-patterns
Angular CLI MCP Server setup https://angular.dev/ai/mcp
Angular AI Tutor https://angular.dev/ai/ai-tutor
Language Service https://angular.dev/tools/language-service
Style Guide Updatedhttps://angular.dev/style-guide
Security https://angular.dev/best-practices/security
Accessibility https://angular.dev/best-practices/a11y
Unhandled errors in Angular https://angular.dev/best-practices/error-handling
Keeping up-to-date https://angular.dev/update
Angular v21 Release Newhttps://angular.dev/events/v21
NgModules https://angular.dev/guide/ngmodules/overview
Web workers https://angular.dev/ecosystem/web-workers
Custom build pipeline https://angular.dev/ecosystem/custom-build-pipeline
Tailwind Newhttps://angular.dev/guide/tailwind
Angular Fire https://github.com/angular/angularfire#readme
Google Maps https://github.com/angular/components/tree/main/src/google-maps#readme
Google Pay https://github.com/google-pay/google-pay-button#angular
YouTube player https://github.com/angular/components/blob/main/src/youtube-player/README.md
Angular CDK https://material.angular.dev/cdk/categories
Angular Material https://material.angular.dev/
Overview https://angular.dev/guide/forms
Overview Newhttps://angular.dev/guide/forms/signals/overview
Form models Newhttps://angular.dev/guide/forms/signals/models
Form model design Newhttps://angular.dev/guide/forms/signals/model-design
Field state management Newhttps://angular.dev/guide/forms/signals/field-state-management
Validation Newhttps://angular.dev/guide/forms/signals/validation
Custom controls Newhttps://angular.dev/guide/forms/signals/custom-controls
Comparison with other form systems Newhttps://angular.dev/guide/forms/signals/comparison
Migrating from Legacy Forms Newhttps://angular.dev/guide/forms/signals/migration
Reactive forms https://angular.dev/guide/forms/reactive-forms
Strictly typed reactive forms https://angular.dev/guide/forms/typed-forms
Validate form input https://angular.dev/guide/forms/form-validation
Building dynamic forms https://angular.dev/guide/forms/dynamic-forms
Template-driven forms https://angular.dev/guide/forms/template-driven-forms
Validate form input https://angular.dev/guide/forms/form-validation
https://github.com/angular/angular/edit/main/adev/src/content/guide/forms/form-validation.md
Validating input in template-driven formshttps://angular.dev/guide/forms/form-validation#validating-input-in-template-driven-forms
native HTML form validationhttps://developer.mozilla.org/docs/Web/Guide/HTML/HTML5/Constraint_validation
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
NgModelhttps://angular.dev/api/forms/NgModel
inputhttps://angular.dev/api/core/input
typehttps://angular.dev/api/forms/RequiredValidator
formhttps://angular.dev/api/forms/signals/form
minlengthhttps://angular.dev/api/forms/MinLengthValidator
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
minlengthhttps://angular.dev/api/forms/MinLengthValidator
minlengthhttps://angular.dev/api/forms/MinLengthValidator
Custom validatorshttps://angular.dev/guide/forms/form-validation#defining-custom-validators
NgModelhttps://angular.dev/api/forms/NgModel
NgModelhttps://angular.dev/api/forms/NgModel
FormControlhttps://angular.dev/api/forms/FormControl
AbstractControlhttps://angular.dev/guide/forms/api/forms/AbstractControl
minlengthhttps://angular.dev/api/forms/MinLengthValidator
Validating input in reactive formshttps://angular.dev/guide/forms/form-validation#validating-input-in-reactive-forms
Validator functionshttps://angular.dev/guide/forms/form-validation#validator-functions
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
Built-in validator functionshttps://angular.dev/guide/forms/form-validation#built-in-validator-functions
write your own validator functionshttps://angular.dev/guide/forms/form-validation#defining-custom-validators
minlengthhttps://angular.dev/api/forms/MinLengthValidator
Validatorshttps://angular.dev/api/forms/Validators
Validatorshttps://angular.dev/guide/forms/api/forms/Validators
FormGrouphttps://angular.dev/api/forms/FormGroup
FormControlhttps://angular.dev/api/forms/FormControl
Validatorshttps://angular.dev/api/forms/Validators
Validatorshttps://angular.dev/api/forms/Validators
minLengthhttps://angular.dev/api/forms/signals/minLength
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
Validators.requiredhttps://angular.dev/api/forms/Validators#required
Validators.minLength(4)https://angular.dev/api/forms/Validators#minLength(4)
inputhttps://angular.dev/api/core/input
typehttps://angular.dev/api/forms/RequiredValidator
formhttps://angular.dev/api/forms/signals/form
formControlNamehttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
minlengthhttps://angular.dev/api/forms/MinLengthValidator
Defining custom validatorshttps://angular.dev/guide/forms/form-validation#defining-custom-validators
ValidatorFnhttps://angular.dev/api/forms/ValidatorFn
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
Adding custom validators to reactive formshttps://angular.dev/guide/forms/form-validation#adding-custom-validators-to-reactive-forms
FormControlhttps://angular.dev/api/forms/FormControl
FormGrouphttps://angular.dev/api/forms/FormGroup
FormControlhttps://angular.dev/api/forms/FormControl
Validatorshttps://angular.dev/api/forms/Validators
Validatorshttps://angular.dev/api/forms/Validators
minLengthhttps://angular.dev/api/forms/signals/minLength
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
Adding custom validators to template-driven formshttps://angular.dev/guide/forms/form-validation#adding-custom-validators-to-template-driven-forms
NG_VALIDATORShttps://angular.dev/api/forms/NG_VALIDATORS
NG_VALIDATORShttps://angular.dev/api/forms/NG_VALIDATORS
NG_VALIDATORShttps://angular.dev/api/forms/NG_VALIDATORS
forwardRefhttps://angular.dev/api/core/forwardRef
inputhttps://angular.dev/api/core/input
validatehttps://angular.dev/api/forms/signals/validate
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
Directivehttps://angular.dev/api/core/Directive
NG_VALIDATORShttps://angular.dev/api/forms/NG_VALIDATORS
forwardRefhttps://angular.dev/api/core/forwardRef
inputhttps://angular.dev/api/core/input
validatehttps://angular.dev/api/forms/signals/validate
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
inputhttps://angular.dev/api/core/input
typehttps://angular.dev/api/forms/RequiredValidator
formhttps://angular.dev/api/forms/signals/form
minlengthhttps://angular.dev/api/forms/MinLengthValidator
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
Control status CSS classeshttps://angular.dev/guide/forms/form-validation#control-status-css-classes
formhttps://angular.dev/api/forms/signals/form
formhttps://angular.dev/api/forms/signals/form
Cross-field validationhttps://angular.dev/guide/forms/form-validation#cross-field-validation
custom validatorhttps://angular.dev/guide/forms/form-validation#defining-custom-validators
Adding cross-validation to reactive formshttps://angular.dev/guide/forms/form-validation#adding-cross-validation-to-reactive-forms
FormGrouphttps://angular.dev/api/forms/FormGroup
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
FormGrouphttps://angular.dev/api/forms/FormGroup
FormGrouphttps://angular.dev/api/forms/FormGroup
FormGrouphttps://angular.dev/api/forms/FormGroup
FormGrouphttps://angular.dev/api/forms/FormGroup
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
ValidatorFnhttps://angular.dev/api/forms/ValidatorFn
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
ValidatorFnhttps://angular.dev/api/forms/ValidatorFn
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
FormGrouphttps://angular.dev/api/forms/FormGroup
gethttps://angular.dev/guide/forms/api/forms/AbstractControl#get
FormGrouphttps://angular.dev/api/forms/FormGroup
interacting with the formhttps://angular.dev/guide/forms/form-validation#control-status-css-classes
Adding cross-validation to template-driven formshttps://angular.dev/guide/forms/form-validation#adding-cross-validation-to-template-driven-forms
https://angular.dev/api/forms/NG_VALIDATORS
NG_VALIDATORShttps://angular.dev/api/forms/NG_VALIDATORS
Directivehttps://angular.dev/api/core/Directive
NG_VALIDATORShttps://angular.dev/api/forms/NG_VALIDATORS
forwardRefhttps://angular.dev/api/core/forwardRef
validatehttps://angular.dev/api/forms/signals/validate
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
formhttps://angular.dev/api/forms/signals/form
formhttps://angular.dev/api/forms/signals/form
ngFormhttps://angular.dev/api/forms/NgForm
Creating asynchronous validatorshttps://angular.dev/guide/forms/form-validation#creating-asynchronous-validators
AsyncValidatorFnhttps://angular.dev/api/forms/AsyncValidatorFn
AsyncValidatorhttps://angular.dev/api/forms/AsyncValidator
validate()https://angular.dev/api/forms/signals/validate
inputhttps://angular.dev/api/core/input
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
modelhttps://angular.dev/api/core/model
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
modelhttps://angular.dev/api/core/model
Implementing a custom async validatorhttps://angular.dev/guide/forms/form-validation#implementing-a-custom-async-validator
AsyncValidatorhttps://angular.dev/api/forms/AsyncValidator
Injectablehttps://angular.dev/api/core/Injectable
AsyncValidatorhttps://angular.dev/api/forms/AsyncValidator
validatehttps://angular.dev/api/forms/signals/validate
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
validate()https://angular.dev/api/forms/signals/validate
validate()https://angular.dev/api/forms/signals/validate
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
ValidationErrorhttps://angular.dev/api/forms/signals/ValidationError
Adding async validators to reactive formshttps://angular.dev/guide/forms/form-validation#adding-async-validators-to-reactive-forms
FormControlhttps://angular.dev/api/forms/FormControl
validatehttps://angular.dev/api/forms/signals/validate
FormControlhttps://angular.dev/api/forms/FormControl
AbstractControlOptionshttps://angular.dev/guide/forms/api/forms/AbstractControlOptions
FormControlhttps://angular.dev/api/forms/FormControl
Adding async validators to template-driven formshttps://angular.dev/guide/forms/form-validation#adding-async-validators-to-template-driven-forms
NG_ASYNC_VALIDATORShttps://angular.dev/api/forms/NG_ASYNC_VALIDATORS
validatehttps://angular.dev/api/forms/signals/validate
Directivehttps://angular.dev/api/core/Directive
NG_ASYNC_VALIDATORShttps://angular.dev/api/forms/NG_ASYNC_VALIDATORS
forwardRefhttps://angular.dev/api/core/forwardRef
AsyncValidatorhttps://angular.dev/api/forms/AsyncValidator
validatehttps://angular.dev/api/forms/signals/validate
AbstractControlhttps://angular.dev/api/forms/AbstractControl
ValidationErrorshttps://angular.dev/api/forms/ValidationErrors
validatehttps://angular.dev/api/forms/signals/validate
inputhttps://angular.dev/api/core/input
typehttps://angular.dev/api/forms/RequiredValidator
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
Optimizing performance of async validatorshttps://angular.dev/guide/forms/form-validation#optimizing-performance-of-async-validators
submithttps://angular.dev/api/forms/signals/submit
inputhttps://angular.dev/api/core/input
ngModelhttps://angular.dev/api/forms/SelectMultipleControlValueAccessor
FormControlhttps://angular.dev/api/forms/FormControl
FormControlhttps://angular.dev/api/forms/FormControl
Interaction with native HTML form validationhttps://angular.dev/guide/forms/form-validation#interaction-with-native-html-form-validation
native HTML form validationhttps://developer.mozilla.org/docs/Web/Guide/HTML/Constraint_validation
API docshttps://angular.dev/guide/forms/api/forms/NgForm#native-dom-validation-ui
Bloghttps://blog.angular.dev
X (formerly Twitter)https://x.com/angular
Blueskyhttps://bsky.app/profile/angular.dev
YouTubehttps://www.youtube.com/angular
Discord https://discord.gg/angular
GitHubhttps://github.com/angular/angular
Stack Overflow https://stackoverflow.com/questions/tagged/angular
Contribute https://github.com/angular/angular/blob/main/CONTRIBUTING.md
Code of Conduct https://github.com/angular/code-of-conduct/blob/main/CODE_OF_CONDUCT.md
Report Issues https://github.com/angular/angular/issues
Google's DevLibrary https://devlibrary.withgoogle.com/products/angular?sort=updated
Angular Google Developer Experts https://developers.google.com/community/experts/directory?specialization=angular
Press Kithttps://angular.dev/press-kit
Roadmaphttps://angular.dev/roadmap
简体中文版https://angular.cn/
正體中文版https://dev.angular.tw/
日本語版https://angular.jp/
한국어https://angular.kr/
MIT-style Licensehttps://angular.dev/license
CC BY 4.0https://creativecommons.org/licenses/by/4.0/

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