Validators class
Provides a set of validators used by form controls.
A validator is a function that processes a Control or collection of controls and returns a map of errors. A null map means that validation has passed.
Example
Control loginControl = new Control("", Validators.required)
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
compose(
List< ValidatorFn?> ? validators) → ValidatorFn? - Compose multiple validators into a single function that returns the union of the individual error maps.
-
maxLength(
num maxLength) → ValidatorFn - Validator that requires controls to have a value of a maximum length.
-
minLength(
num minLength) → ValidatorFn - Validator that requires controls to have a value of a minimum length.
-
nullValidator(
AbstractControl c) → Map< String, bool> ? - No-op validator.
-
pattern(
String pattern) → ValidatorFn - Validator that requires a control to match a regex to its value.
-
required(
AbstractControl control) → Map< String, bool> ? - Validator that requires controls to have a non-empty value.