Angular Material 5: how to call a function when a tab is selected (clicked)?

The selectedTabChanged event has to be attached to the <mat-tab-group> element

<mat-tab-group (selectedTabChange)="tabClick($event)">
  <mat-tab label="Tab 1">Content 1</mat-tab>
  <mat-tab label="Tab 2">Content 2</mat-tab>
</mat-tab-group>

---

tabClick(tab) {
  console.log(tab);
}

Demo

<mat-tab-group (selectedTabChange)="onChange($event)">
    <mat-tab label="Tab 1">Content 1</mat-tab>
    <mat-tab label="Tab 2">Content 2</mat-tab>
</mat-tab-group>

Selected tab will trigger out the tabChange Event and get the active tab.

And in the .ts file:

onChange(event: MatTabChangeEvent) {
    const tab = event.tab.textLabel;
    console.log(tab);
    if(tab===" Tab 1")
     {
       console.log("function want to implement");
      }
  }

An event should be selectedTabChange to the mat-tab-group

<mat-tab-group (selectedTabChange)="tabClick()">
    <mat-tab label="Regular">
       <h1>Some more tab content</h1>
    </mat-tab>
</mat-tab-group>