To integrate Mixpanel with NestJS

To integrate Mixpanel with NestJS, you can use the official Mixpanel JavaScript library and install it via npm:

Install the Mixpanel library:

npm install mixpanel-browser --save

Create a module for Mixpanel by running the following command:

nest generate module mixpanel

In this Mixpanel module, import the Mixpanel library and add it to the imports array:

import { Mixpanel } from 'mixpanel-browser';

@Module({
  imports: [
    Mixpanel
  ]
})
export class MixpanelModule {}

In the component where you want to use Mixpanel, import the Mixpanel service and initialize it with your Mixpanel token:

import * as mixpanel from 'mixpanel-browser';
import { Injectable } from '@nestjs/common';
import AppConfigService from '../../config/app/configuration.service';

@Injectable()
export class MixpanelService {
  constructor(private readonly configService: AppConfigService) {}

  init(userToken: string): void {
    mixpanel.init(this.configService.mixPanelToken);
    mixpanel.identify(userToken);
  }

  track(id: string, action: any = {}): void {
    mixpanel.track(id, action);
  }
  people(id: string, action: any = {}): void {
    mixpanel.people(id, action);
  }
}

To track an event, use the track method:

  constructor(
    private readonly mixpanelService: MixpanelService,
  ) {}

example track:

      this.mixpanelService.init('UZI');
      this.mixpanelService.track('Signup', {
        $first_name: 'Uz',
        $last_name: 'Oz',
        $created: new Date().toISOString(),
        plan: 'premium',
      });

To set user properties, use the people.set method:

this.mixpanelService.people.set({
  "$email": "joe@example.com",
  "$first_name": "Joe",
  "$last_name": "Smith",
});

You can also use identify method to identify user with unique ID

this.mixpanelService.identify("13793");

That's it! You have now integrated Mixpanel with your NestJS app using a dedicated Mixpanel module. You can find more information on Mixpanel's official documentation.

Top comments (3)

Mesonrale Ope • Feb 2

Hi! Nice write-up.
I tried to use your implementation and ran into some issues. I made a few changes before it worked.

The correct lib to use with NestJs is npm install mixpanel. The lib you used in your tutorial npm install mixpanel-browser was meant for the web. Your implementation was also for the web instead of Node(NestJs). You might need to make some adjustment to the article.