Angular Surveys installation

Install the package

Required

Install the PostHog JavaScript library using your package manager:

npm install posthog-js
yarn add posthog-js
pnpm add posthog-js

Initialize PostHog

Required

In your src/main.ts, initialize PostHog using your project token and instance address:

For Angular v17 and above, you can set up PostHog as a singleton service. To do this, start by creating and injecting a PosthogService instance.

Create a service by running ng g service services/posthog. The service should look like this:

src/main.ts
// src/app/services/posthog.service.ts
import { DestroyRef, Injectable, NgZone } from "@angular/core";
import posthog from "posthog-js";
import { environment } from "../../environments/environment";
import { Router } from "@angular/router";
@Injectable({ providedIn: "root" })
export class PosthogService {
  constructor(
    private ngZone: NgZone,
    private router: Router,
    private destroyRef: DestroyRef,
  ) {
    this.initPostHog();
  }
  private initPostHog() {
    this.ngZone.runOutsideAngular(() => {
      posthog.init(environment.posthogKey, {
        api_host: environment.posthogHost,
        defaults: '2026-01-30',
      });
    });
  }
}

The service is initialized outside of the Angular zone to reduce change detection cycles. This is important to avoid performance issues with session recording. Then, inject the service in your app's root component app.component.ts. This will make sure PostHog is initialized before any other component is rendered.

src/app/app.component.ts
// src/app/app.component.ts
import { Component } from "@angular/core";
import { RouterOutlet } from "@angular/router";
import { PosthogService } from "./services/posthog.service";
@Component({
  selector: "app-root",
  styleUrls: ["./app.component.scss"],
  template: `
    <router-outlet />`,
  imports: [RouterOutlet],
})
export class AppComponent {
  title = "angular-app";
  constructor(posthogService: PosthogService) {}
}

In your src/main.ts, initialize PostHog using your project API key and instance address. You can find both in your project settings.

src/main.ts
// src/main.ts
import { bootstrapApplication } from '@angular/platform-browser';
import { appConfig } from './app/app.config';
import { AppComponent } from './app/app.component';
import { environment } from "./environments/environment";
import posthog from 'posthog-js'
posthog.init(environment.posthogKey, {
  api_host: environment.posthogHost,
  defaults: '2025-11-30'
})
bootstrapApplication(AppComponent, appConfig)
  .catch((err) => console.error(err));

Send events

Click around and view a couple pages to generate some events. PostHog automatically captures pageviews, clicks, and other interactions for you.

If you'd like, you can also manually capture custom events:

JavaScript
posthog.capture('my_custom_event', { property: 'value' })

Next steps

Recommended

After installing the PostHog SDK, you can create your first survey.

Resource	Description
Creating surveys	Learn how to build and customize your surveys
Targeting surveys	Show surveys to specific users based on properties, events, or feature flags
How to create custom surveys	Build advanced survey experiences with custom code
Framework guides	Setup guides for React, Next.js, Vue, and other frameworks
More tutorials	Other real-world examples and use cases

You should also identify users and capture events with PostHog to control who and when to show surveys to your users.

Not all survey features are available on every SDK. See the SDK feature support matrix for a full comparison.