Utilize Angular 2 form group to manage control activation and deactivation on forms

Just starting out in Angular 2 and I have a question that needs answering: I've created a form using Angular 2 which consists of multiple controls. These controls are dependent on each other, for instance:

Check out this diagram for reference

If radioButton1 is selected, then display option1, option2, option3 in the next level. Or if radioButton2 is chosen, show option3, option4, option5 in the following level. And if radioButton1 and option2 are selected, then display option6 in the third level. And so on.

What would be the most effective way to achieve this in Angular2? Can FormGroup be used?

angularjstypescript

Answer №1

One way to handle conditional logic in Angular is by using NgSwitch.

Here is the link for more information on NgSwitch directive.

<div>//radio button group</div>
<div [ngSwitch]="radiomodelvalue">
  <div *ngSwitchCase="value1">//option group 1</div>
  <div *ngSwitchCase="value2">//option group 2</div>
  <div *ngSwitchCase="value3">//option group 3</div>
 <div *ngSwitchDefault></div>
</div>

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