how to add validator to formgroup

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showing results for - "how to add validator to formgroup"
Alonso
18 Mar 2019
1//Validate all the form group
2this.form.updateValueAndValidity();
3
4//Validate only one form control
5this.form.controls['formControlName'].updateValueAndValidity();
William
12 Nov 2018
1 this.myForm = this.formBuilder.group({
2        myControl1: this.defaultValue,
3        myControl2: this.defaultValue
4      });
5      debugger
6      this.myForm.setValidators(this.comparisonValidator())
7}
8
9 public comparisonValidator() : ValidatorFn{
10       return (group: FormGroup): ValidationErrors => {
11          const control1 = group.controls['myControl1'];
12          const control2 = group.controls['myControl2'];
13          if (control1.value !== control2.value) {
14             control2.setErrors({notEquivalent: true});
15          } else {
16             control2.setErrors(null);
17          }
18          return;
19    };
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formgroup check if validangular formgroup mark as touchedformgroup reset valuescan 27t bind to 27formgroup 27 since it isn 27t a known property of 27formunique validator angular reactive formformgroup expects a formgroup instance please pass one in example 3a 3cdiv 5bformgroup 5d 3d 22mygroup 22 3e 3cinput formcontrolname 3d 22firstname 22 3e 3c 2fdiv 3e in your class 3a this mygroup 3d new formgroup 28 7b firstname 3a new formcontrol 28 29 7d 29 3b formgroup addcontrol
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