npm install @ng-maps/direction
# or
yarn add @ng-maps/direction

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { NgMapsCoreModule } from '@ng-maps/core';
import { NgMapsGoogleModule } from '@ng-maps/google';
import { NgMapsDirectionModule } from '@ng-maps/direction';

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    NgMapsCoreModule, //@ng-maps/core
    NgMapsGoogleModule, //@ng-maps/google
    NgMapsDirectionModule, //@ng-maps/direction
  ],
  providers: [
    {
      provide: GOOGLE_MAPS_API_CONFIG,
      useValue: {
        apiKey: 'YOUR_API_KEY',
      },
    },
  ],
  bootstrap: [AppComponent],
})
export class AppModule {}

<map-view [latitude]="lat" [longitude]="lng">
  <map-direction [origin]="origin" [destination]="destination"> </map-direction>
</map-view>

map-view {
  height: 400px;
}

public lat = 24.799448;
public lng = 120.979021;

public origin: any;
public destination: any;

ngOnInit() {
  this.getDirection();
}

getDirection() {
  this.origin = { lat: 24.799448, lng: 120.979021 };
  this.destination = { lat: 24.799524, lng: 120.975017 };

  // Location within a string
  // this.origin = 'Taipei Main Station';
  // this.destination = 'Taiwan Presidential Office';
}