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Angular form validation directives

Angular provides built-in directives to handle user input validation within forms^[angular-01.md]. These directives can be applied to form controls to enforce rules, such as requiring a field or checking validity^[angular-01.md].

Validation Directives

  • required: A validation directive that ensures the form control has a value^[angular-01.md].
  • ng-disabled: An attribute directive that can be used to disable elements, such as a submit button, based on the validity of the form^[angular-01.md].

Form State and Handling

Angular forms expose properties that reflect the current state of the form or input controls^[angular-01.md]. A common pattern is to disable a button to prevent submission if the form data is invalid^[angular-01.md].

  • form.$invalid: A property on the form object that returns true if the form or its controls are currently failing validation^[angular-01.md].

To handle form submission, the ng-submit directive is typically used on the <form> element^[angular-01.md]. This directive specifies a function in the scope to execute when the form is submitted^[angular-01.md].

  • ng-submit: Binds a function (e.g., registor(user)) to the form submission event^[angular-01.md].

Sources

^[angular-01.md]

[[Angular]]