Expected validator to return Promise or Observable

Expected validator to return Promise or Observable

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Angular form updateValueAndValidity of all children controls

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FormBuilder group is deprecated

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Inconsistent validation issue in Angular custom component

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Angular - assign custom validator to a FormGroup

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Angular 4: reactive form control is stuck in pending state with a custom async validator

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Angular5 Custom Validator for Date Min

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use formControlName for custom input component in reactive form

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Form Builder with hasError() for validation throws an error of ERROR TypeError: Cannot read property 'hasError' of undefined

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How to use Bootstrap 4 validation pseudo-classes (:valid, :invalid) with Angular 5 custom validations?

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Angular 4 validator to check 2 controls at the same time

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angular 2 : TypeError: this.form.updateValueAndValidity is not a function

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