if angular formgroup errors code example

Example 1: angular formgroup validate manually

//Validate all the form group
this.form.updateValueAndValidity();

//Validate only one form control
this.form.controls['formControlName'].updateValueAndValidity();

Example 2: formgroup check if valid

form: FormGroup;

onSubmit(){
    //checks if form is valid
       if( this.form.valid){
          //more code here
        }
}