Angular2 - Show/Hide section on selection of radio button

Question

I have to show or hide sections based on selection of radio button

Answer 1

In Angular it can be achieved with *ngIf:

 <input name="options"  [(ngModel)]="options" type="radio" [value]="true" [checked]="options"/> Yes

 <input name="options"[(ngModel)]="options" type="radio" [value]="false" [checked]="!options"/> No

 <h2 *ngIf="options">Supply</h2>
 <h2 *ngIf="!options">Demand</h2>

And no need to check if option==true or false, [checked]="options" and [checked]="!options" do the same.

Answer 2

<div>
            <div class="radio">
                <label><input type="radio" [(ngModel)]="model.prop" name="prop" value="A">A</label>
            </div>
            <div class="radio">
                <label><input type="radio" [(ngModel)]="model.prop" name="prop" value="B">B</label>
            </div>
            <div class="radio">
                <label><input type="radio" [(ngModel)]="model.prop" name="prop" value="C">C</label>
            </div>
    </div>

<div *ngIf="model.prop === 'A'">A</div>
<div *ngIf="model.prop === 'B'">B</div>
<div *ngIf="model.prop === 'C'">C</div>

if you want to preselect the value type then type

 model.prop = 'A';

in your .ts file