Angular 2+ learning

angular-2.md

Angular Form

Angular form array -> group -> control

• Watch value change in a form group array

availablePackages.forEach((item, index) => { // availablePackages is an array
      /* Watch value change package[index], specific group only */
      this.budgetForm.get('package').get(`${index}`).valueChanges.subscribe((value) => {
        console.log(value);
        console.log(index);
        console.log(`Change array second value....`);
      });
    });

Update array object in angular with rective form

this.budgetForm.setControl('package',
      this.formBuilder.array(
        availablePackages.map((item) => this.formBuilder.group(item))
      ));