How to *ngIf on router link?

If your routes are well defined you can try this:

isTournamentRoute() {
    return this.router.url.includes("/tournament");
}

Which is piggybacking off the non accepted answer to add a bit more flexibility.

I'm using the other approach.

template:

<div class="col-12 col-sm-12 col-md-12 col-lg-12">
   <app-header></app-header>
   <app-banner *ngIf="isHomeRoute()"></app-banner>
</div>

.ts file:

import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.less']
})

export class AppComponent implements OnInit {

  constructor(private router: Router) {}

  ngOnInit() {}

  isHomeRoute() {
    return this.router.url === '/';
  }
}

You can inject Router from '@angular/router' and get the current route you're on.

For example:

// mycomponent.component.ts
class MyComponent {
    constructor(public router: Router) {

    }
}

// mycomponent.component.html
<div *ngIf="router.url === '/some/route'">

</div>