app.component.html
<h2 style="padding-top:25px; padding-bottom:25px;">
    Angular Material - How to get Tabs selected index
</h2>
<h3>
    Tabs selected index : {{tabs.selectedIndex}}
</h3>
<mat-tab-group #tabs>
    <mat-tab label="Android">
        Lorem ipsum dolor sit amet, consectetur adipiscing elit.
        Nam tincidunt elit non molestie rutrum.
        Donec blandit risus et sem iaculis aliquam.
    </mat-tab>
    <mat-tab label="Kotlin">
        Cras feugiat pharetra dolor, ac euismod tellus maximus eu.
        Etiam dignissim enim vel lacus molestie, in iaculis tellus
        ultrices.
    </mat-tab>
    <mat-tab label="Java">
        Integer rhoncus tristique felis ut dignissim.
    </mat-tab>
</mat-tab-group>
app.module.ts [import]
import { MatTabsModule } from '@angular/material/tabs'
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