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

import { SimpleSmoothScrollModule } from 'ng2-simple-smooth-scroll'; // <-- add

@NgModule({
  imports: [
    BrowserModule, 
    SimpleSmoothScrollModule  // <-- add
  ],
  declarations: [ 
    AppComponent,
  ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }

import { Component, OnInit } from '@angular/core';
import { SimpleSmoothScrollService } from 'ng2-simple-smooth-scroll';
import { SimpleSmoothScrollOption } from 'ng2-simple-smooth-scroll';

@Component({
  ...
})
export class AppComponent implements OnInit{

  constructor(private smooth: SimpleSmoothScrollService) { }

  ngOnInit() {
    this.smooth.smoothScrollToAnchor();
  }
  
  goTop(){
    this.smooth.smoothScrollToTop({ duration: 1000, easing: 'linear' });
  }
}

let option1 = { duration: 500 };
let option2 = { duration: 1000, easing: 'easeOutQuart'};
let option3 = { easing: 'linear'};

// this.smooth.smoothScrollToTop(option1);
// this.smooth.smoothScrollToAnchor(option2);

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

@Component({  
  ...
  template: `
    <div id="div1">
      <a href="#div2" SimpleSmoothScroll [showHash]="true">Click!!</a>
    </div>
    <div id="div2" SimpleSmoothScroll [scrollTo]="'div1'" [duration]="500">
      <h1>Click me</h1>
    </div>
  `,
  ...
})
export class AppComponent{
	...
}