MinLengthValidator
A directive that adds minimum length validation to controls marked with the
minlength attribute. The directive is provided with the NG_VALIDATORS mult-provider list.
See also
NgModules
Selectors
[minlength][formControlName][minlength][formControl][minlength][ngModel]
Properties
| Property | Description |
|---|---|
@Input()
|
Tracks changes to the the minimum length bound to this directive. |
Description
Adding a minimum length validator
The following example shows how to add a minimum length validator to an input attached to an ngModel binding.
<input name="firstName" ngModel minlength="4">
Methods
|
A lifecycle method called when the directive's inputs change. For internal use only. |
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Parameters
Returns
|
|
Method that validates whether the value meets a minimum length requirement. Returns the validation result if enabled, otherwise null. |
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Parameters
Returns
|
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Registers a callback function to call when the validator inputs change. |