how to make exact routes in angular 9 code example

Example 1: pathmatch angular

content_copy
      
      [{
  path: '',
  pathMatch: 'full',
  redirectTo: 'main'
}, {
  path: 'main',
  component: Main
}]

Example 2: how to add changes every time you route navigate to page in angular

// Place import at the top
import { Router,NavigationStart} from '@angular/router';

//Place the code below inside your class
constructor(private router: Router){}

ngOnInit(){
   this.router.events.subscribe(event =>{
      if (event instanceof NavigationStart){
   		
      }
   })
}