Angular 2+ validation patterns, syntax and properties. Validation of forms, controls, models using various Angular 2+ validation directives.
Angular's built-in form properties are there to help us with client-side validation.
You can either:
Questions tagged [angular-validation]
425 questions
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votes
1 answer
ControlValueAccessor know when required is set on reactive form
I have a custom control that implements ControlValueAccessor and is only used with a reactive form. How do I tell, inside the custom control, when the required validator has been assigned or removed?
I don't want to just create an @Input for a…
Gargoyle
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votes
1 answer
Angular form required/pattern validation is not working
I have a simple form which contains one textbox. I added required and pattern validation on this textbox. It's added red borer on the textbox when textbox is empty or not matching pattern but not displaying error message.
I have created a sample…
alok_dida
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votes
2 answers
Checkbox group, submit button only if at least one checkbox is checked Angular 2
I have a checkbox group with 3 items. I created it with Angular 5.0.5 and Clarity vm. I want my function to check if at least one of the checkboxes is checked and THEN go at the next page, which is a wizard. Until now the wizard opens without…
Init
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2 answers
Triggering form validation programmatically in angular-js
I am using a custom directive to submit a form programmatically however no form validation is applied before submitting the form. I have called $setDirty() on the form field and $setSubmitted() on the form but the form is still submitted even if the…
Maverik Minett
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votes
1 answer
Angular 8 Reactive Form Validators
I have a FormControl in my Angular 8 app like this:
this.closingOrderFormGroup = this._fb.group({
final_price: new FormControl('', [ Validators.required ] ),
});
I tried to add/remove Validators.required dynamically based on some radio button…
ng-hobby
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