back button ionic 5 code example

Example 1: back button ionic

<ion-header>
  <ion-toolbar>
    <ion-buttons slot="start">
      <ion-back-button></ion-back-button>
    </ion-buttons>
  </ion-toolbar>
</ion-header>

Example 2: ionic how to block back button

this.platform.backButton.subscribe(() => {
  // do something here
});