Is there a way to display the validation message as I type, rather than only when the input loses focus? I've tried the following:
form: FormGroup = new FormFroup({
direction: new FormControl("", {
validators:[Validation.required,Validation.pattern("^[0-9]*$")],
updateOn: 'change'
}
In the HTML, I haven't subscribed to the (change) event - could this be the issue? If so, what do I need to do in order to get the validation to happen on typing changes?
Typically, the validator will execute when there is a change in the control value.
form: FormGroup = new FormGroup({
direction: new FormControl(null, {
validators: [Validators.required, Validators.pattern("^[0-9]*$")]
})
});
If you need to display an error message based on validation errors, you can check if there are errors and use the hasError method to target specific errors.
template
<div [formGroup]="form">
<input formControlName="direction">
<div *ngIf="form.get('direction').errors">
<div *ngIf="form.get('direction').hasError('required')">This field is required</div>
<div *ngIf="form.get('direction').hasError('pattern')">Invalid pattern 🚫🚫 </div>
</div>
</div>
Feel free to check out this demo 👉👉 demo 🚀
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