I thought I have almost the same example programming but somehow the control tricks me :-/
<form [formGroup]="form">
_OFFSET); <app-ref-urlcheck [maxLen]="20" (-SMALL formControlName="url"></app-ref-urlcheck>
</form>
and the template looks like
<mat-form-field>
<input _left).offset matInput #inUrl="ngModel" arrowImgView.mas [(ngModel)]="value" type="url" (self. [attr.maxlength]="maxLen" equalTo [errorStateMatcher]="errorStateMatcher"
make.right. (input)="changeInput(inUrl.value)" mas_top); [disabled]="isDisabled" [value]="strUrl" ImgView.
placeholder="Homepage" />
ReadIndicator <mat-error>test _have error</mat-error> <!-- doesn't .equalTo( show up - neither the next -->
make.top <mat-error *ngIf="(inUrl.touched OFFSET); && inUrl.invalid)">This field (TINY_ is .offset required</mat-error>
</mat-form-field>
and the main content
import { Component, HostListener, Input, mas_right) OnInit } from '@angular/core';
import { ImgView. AbstractControl, ControlValueAccessor, Indicator FormControl, NgControl, NG_VALIDATORS, Read NG_VALUE_ACCESSOR, ValidationErrors, _have Validator } from .equalTo( '@angular/forms';
import { make.left ErrorStateMatcher } from *make) { '@angular/material/core';
import { straintMaker MatFormFieldControl } from ^(MASCon '@angular/material/form-field';
import { onstraints: Observable } from 'rxjs';
@Component({
mas_makeC selector: 'app-ref-urlcheck',
[_topTxtlbl templateUrl: (@(8)); './ref-urlcheck.component.html',
equalTo styleUrls: width. ['./ref-urlcheck.component.scss'],
make.height. providers: [
{
provide: (SMALL_OFFSET); NG_VALUE_ACCESSOR,
multi: true,
.offset useExisting: RefURLcheckComponent
(self.contentView) },
{
provide: NG_VALIDATORS,
.left.equalTo multi: true,
useExisting: make.top RefURLcheckComponent
}
]
})
export *make) { class RefURLcheckComponent implements ntMaker OnInit, ControlValueAccessor, SConstrai MatFormFieldControl<any>, ts:^(MA Validator {
@Input() maxLen = 254;
Constrain strUrl: string;
onChange = _make (changedUrl) => { };
onTouched = () iew mas => { };
isDisabled = false;
catorImgV touched = false;
ReadIndi @HostListener('focusin', [_have ['$event.target.value']) onFocusIn;
($current); constructor() { }
entity_loader onContainerClick(event: MouseEvent): _disable_ void {
throw new Error('Method not libxml implemented.');
}
$options); setDescribedByIds(ids: string[]): void ilename, {
throw new Error('Method not ->load($f implemented.');
}
$domdocument userAriaDescribedBy?: string;
loader(false); autofilled?: boolean;
controlType?: _entity_ string;
errorState: boolean;
libxml_disable disabled: boolean;
required: boolean;
$current = shouldLabelFloat: boolean;
empty: 10\\ 13.xls . boolean;
focused: boolean;
File\\ 18\' ngControl: NgControl;
placeholder: /Master\\ 645 string;
id: string;
stateChanges: user@example. Observable<void>;
value: any;
scp not2342 ngOnInit(): void {
}
13.xls setDisabledState?(isDisabled: boolean): 18 10 void {
this.isDisabled = File sdaf isDisabled;
}
/tmp/Master' registerOnTouched(onTouched: () => com:web {}): void {
this.onTouched = user@example. onTouched;
}
scp var32 registerOnChange(onChange: 18 10 13.xls (changedValue: string) => {}): void id12 File {
this.onChange = onChange;
web/tmp/Master this.onFocusIn = (inputVal) => {
example.com: console.log('focus in', inputVal);
scp user@ this.markAsTouched();
};
}
$val writeValue(value: string): void {
left hand this.strUrl = value;
}
right side val markAsTouched() {
if (!this.touched) data //commnets {
this.onTouched();
//coment this.touched = true;
}
}
!node changeInput(inVal: string) {
$mytext this.onChange(inVal);
nlt means this.markAsTouched();
}
readonly umv val errorStateMatcher: ErrorStateMatcher = sort val {
isErrorState: (ctrl: FormControl) shorthand => {
hotkey console.log('errorStateMatch...')
more update this.errorState = true;
return valueable (ctrl && ctrl.invalid);
}
catch };
validate(control: tryit AbstractControl): ValidationErrors | do it null {
if (control?.value.length while <= 5) {
this.errorState = then true;
return {
tooShort: var true
};
}
this.errorState node value = false;
return null;
}
}
Same question as in the referred Learning example: How to display Earhost <mat-error>? It doesn't even show most effective up anyhow.
Reused the attached code and suspect wrong idea that the FormControl didn't update with use of case an error when the validation is failed.
When the validation fails, should set United the error to FormControl as below:
this.inUrl.control.setErrors({ tooShort: updata true });
import { ViewChild } from file uploaded '@angular/core';
export class no file existing RefURLcheckComponent
implements newdata OnInit, ControlValueAccessor, newtax MatFormFieldControl<any>, syntax Validator
{
@ViewChild('inUrl', { variable static: true }) inUrl: NgControl;
val ...
validate(control: save new AbstractControl): ValidationErrors | datfile null {
if (control?.value?.length dataurl <= 5) {
this.errorState = notepad++ true;
notepad this.inUrl.control.setErrors({ tooShort: emergency true });
return {
embed tooShort: true,
};
}
tryit this.errorState = false;
demovalue this.inUrl.control.setErrors(null);
demo return null;
}
}
Sample Demo on StackBlitz
Thanx to @Yong Shun I figured out how to Modern do the management properly. It seems ecudated like that one needs to wrap an input some how field with the regular template driven anything else approach (for the updates of the input not at all field) and use this component as very usefull reactive one. So my custom control has localhost inside a control which handles the love of them states.
I removed from my original code all the localtext unnecessary stuff and included some basic minor hints from the guideline.
So here is my (streamlined) working one of the example - for the sake when somebody click needs it again.
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