Add CLItrail to Angular

Where the CLItrail tag goes in Angular, in its own idiom, with the consent, CSP and client-side routing details and how to check it works.

Written for Angular 22 (the same code works from 19)

#Where the tag goes

Edit src/index.html. Put the tag on every page that shows your install command; site-wide is best, after your existing analytics tags.

<head>
  <meta charset="utf-8" />
  <!-- …your analytics tags first -->
  <script defer src="https://YOUR_SERVICE/browser.js" data-website="YOUR_WEBSITE_ID"></script>
</head>

Use the loader in place of the tag: nothing from CLItrail loads until startClitrail() runs. Load the loader before your consent manager's script and call startClitrail() from the manager's accept callback (most managers also run it on later visits once a choice is stored; check yours). Use the marketing category when installs go to Google Ads, Meta, TikTok or X Ads, and the analytics category when they only reach GA4 or your webhooks.

Consent loader

// Loads CLItrail only after the visitor agrees. Call startClitrail() from your
// consent manager's "accepted" callback; nothing is fetched or stored before that.
window.startClitrail = () => {
  if (document.getElementById('clitrail')) return;
  const tag = document.createElement('script');
  tag.id = 'clitrail';
  tag.src = 'https://YOUR_SERVICE/browser.js';
  tag.dataset.website = 'YOUR_WEBSITE_ID';
  document.head.append(tag);
};

<head>
  <meta charset="utf-8" />
  <!-- …your analytics tags first -->
  <script defer src="clitrail-consent.js"></script>
</head>

#Client-side routing

The Angular router changes pages without a reload. Subscribe to NavigationEnd from an app initializer (the first one is the page the tag already recorded).

Route helper

// Records a visit when client-side navigation opens a new page path. The tag records
// the page the browser loaded, so that page is never recorded twice; before the SDK has
// started (for example, before consent) it records nothing.
declare global {
  interface Window {
    InstallAttribution?: { init(options: { service: string; project: string }): Promise<unknown>; ready?: Promise<unknown> };
  }
}

let recorded: string | undefined;

export function recordVisit(): void {
  if (typeof window === 'undefined') return;
  recorded ??= new URL(performance.getEntriesByType('navigation')[0]?.name ?? location.href).pathname;
  const sdk = window.InstallAttribution;
  if (!sdk?.ready || location.pathname === recorded) return;
  recorded = location.pathname;
  sdk.ready = sdk.init({ service: 'https://YOUR_SERVICE', project: 'YOUR_WEBSITE_ID' });
}

import { ApplicationConfig, inject, provideAppInitializer } from '@angular/core';
import { NavigationEnd, Router, provideRouter } from '@angular/router';
import { filter } from 'rxjs';
import { routes } from './app.routes';
import { recordVisit } from './clitrail';

export const appConfig: ApplicationConfig = {
  providers: [
    // …your existing providers
    provideRouter(routes),
    provideAppInitializer(() => {
      inject(Router).events.pipe(filter(event => event instanceof NavigationEnd)).subscribe(() => recordVisit());
    }),
  ],
};

#Content Security Policy

Your server or host headers (with Angular SSR, the Express server in src/server.ts): add https://YOUR_SERVICE to script-src and connect-src, and blob: to worker-src (only Safari before 26 needs that one).

script-src 'self' https://YOUR_SERVICE;
connect-src 'self' https://YOUR_SERVICE;
worker-src 'self' blob:;

#Verify it works

Run ng serve (http://localhost:4200) or deploy.
Open a page with the tag in Chrome or Firefox (accept analytics first if you gate CLItrail on consent), open the developer console and run await InstallAttribution.ready. It resolves to { ok: true, urlId, hasAnalyticsContext, expiresAt }.
In the CLItrail dashboard, open Visits & identities: the visit is listed.
Anything else names the cause: disabled (no consent yet, or data-enabled="false"), opfs_unavailable (the page is not served over https or from localhost), Error (the service refused the visit: add the page's origin, including a development origin such as http://localhost:3000, under Settings → Additional domains). If InstallAttribution is undefined, the tag did not load: check the Network tab and your Content-Security-Policy.

Then run your installer on the same computer and check Install events, or run the hook with --doctor.

#Notes

The helper does nothing during server rendering, so the initializer is safe with Angular SSR.

Angular documentation: angular.dev/api/router/NavigationEnd

Using other install paths or destinations? The setup generator puts this snippet together with your hooks and destination checklist.