ngx-matomo

Matomo (aka. Piwik) web analytics for applications based on Angular 5, 6, 7 & 8.

IMPORTANT NOTE: As I do not use most of Matomo features myself (and my time is limited), I haven't tested most of the code, especially async requests (Promise) made by matomo. If you experience any error, please fill an issue as it is probably easely fixable.

Install

npm i --save @ambroise-rabier/ngx-matomo

Adding Matomo

You can add Matomo either via script tag or using the MatomoInjector in your root component.

Initialize Matomo

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { MatomoModule } from '@ambroise-rabier/ngx-matomo';
import { AppComponent } from './app.component';

@NgModule({
  imports: [
    BrowserModule,
    MatomoModule,
  ],
  declarations: [AppComponent],
  bootstrap: [AppComponent],
})
export class AppModule { }

Inject Matomo into your root component and call init function.

import { Component, AfterViewInit } from '@angular/core';
import { MatomoInjector } from '@ambroise-rabier/ngx-matomo';

@Component({
  selector: 'app-root',
  template: `<router-outlet></router-outlet>`
})
export class AppComponent implements AfterViewInit {
  constructor(
    private matomoInjector: MatomoInjector,
  ) {}
  
  // By initializing Matomo after the view has been generated, you allow Matomo to track outlinks generated on the first view.
  ngAfterViewInit() {
    // For example if you installed Matomo in the subdomain analytics.my-website.com on https
    this.matomoInjector.init('https://analytics.my-website.com/');
  }
}

Once that's done you can import MatomoTracker into any component of your application.

import { Component } from '@angular/core';
import { MatomoTracker } from '@ambroise-rabier/ngx-matomo';

@Component({
  selector: 'app',
  template: `<router-outlet></router-outlet>`
})
export class AppComponent {
  constructor(
    private matomoTracker: MatomoTracker,
  ) { }

  ngOnInit() {
    // Track something on init...
  }
}

Manually trigger events

import { Component } from '@angular/core';
import { MatomoTracker } from '@ambroise-rabier/ngx-matomo';

@Component({
  selector: 'app-my',
  template: `<button (click)="onClick()">Click me !</button>`
})
export class MyComponent {
  count = 0;

  constructor(
    private matomoTracker: MatomoTracker,
  ) { }

  onClick(){
    this.matomoTracker.trackEvent('category', 'action', 'name', ++this.count);
  }
}

Track newly generated outlinks and downloads

If you use the link tracking feature to measure outlinks and downloads, Matomo needs to re-scan the entire DOM for newly added links whenever your DOM changes. Just call this.matomoTracker.enableLinkTracking(); after your DOM has been modified.

Track router events

import { AfterViewInit, Component } from '@angular/core';
import { MatomoInjector } from '@ambroise-rabier/ngx-matomo';
// replace by your env
import { environment } from '../environments/environment';
import { NavigationEnd, Router } from '@angular/router';
import { delay, filter, skip } from 'rxjs/operators';

@Component({
  selector: 'app-root',
  template: `<router-outlet></router-outlet>`
})
export class AppComponent implements AfterViewInit {
  constructor(
    private matomoInjector: MatomoInjector,
    private router: Router,
  ) {}
  
  // By initializing Matomo after the view has been generated, you allow Matomo to track outlinks generated on the first view.
  ngAfterViewInit() {
    // For example if you installed Matomo in the subdomain analytics.my-website.com on https
    this.matomoInjector.init({
      url: 'https://analytics.my-website.com/',
      // It is recommended to use another matomo website id for your preprod, test, dev env.
      id: environment.production ? 1 : 2,
    });
    
    // previous url
    let referrer: string = window.location.href;
    
    this.router.events.pipe(
      // filter out NavigationStart, Resolver, ...
      filter(e => e instanceof NavigationEnd),
      // skip first NavigationEnd fired when subscribing, already handled by init().
      skip(1),
      // idk why, used in angulartics2 lib.
      delay(0),
    ).subscribe(next => {
      // referrer is optional
      this.matomoInjector.onPageChange({ referrer });
      referrer = window.location.href;
    });
  }
}

Matomo documentation

Matomo's site has the detailed documentation on how to set up communication between Matomo and your application. See also:

• https://developer.matomo.org/guides/spa-tracking
• https://developer.matomo.org/api-reference/tracking-api
• https://developer.matomo.org/api-reference/tracking-javascript (this lib seems more low level).
• https://github.com/matomo-org/matomo-nodejs-tracker

Inspired from

ngx-matomo
Angular2Piwik
Angulartics 2

License

MIT