analytics-script

Lightweight analytics script tags for React/Next.js applications (Plausible, Umami, Google Analytics, DataFast, etc.)

Github Repo

https://github.com/iamcorey/analytics-script.git

NPM Package

https://www.npmjs.com/package/analytics-script

Supported Providers

• Plausible Analytics
• Umami
• DataFast
• Google Analytics
• Mixpanel
• Crisp Chat

Installation

npm i analytics-script

Or using pnpm:

pnpm add analytics-script

Usage

Plausible

Standard (legacy format)

import { Plausible } from 'analytics-script';

<Plausible 
  domain="yourdomain.com" 
  scriptUrl="https://plausible.io/js/script.js"
/>

Props

• domain - Your website domain (or use env: NEXT_PUBLIC_PLAUSIBLE_DOMAIN)
• scriptUrl - Plausible script URL (or use env: NEXT_PUBLIC_PLAUSIBLE_SCRIPT_URL)
• defer - Defer script loading (default: true)
• allowLocalhost - Enable in development (default: false)

With initialization (newer format)

import { PlausibleInit } from 'analytics-script';

<PlausibleInit 
  scriptUrl="https://plausible.io/js/pa-XXXXX.js"
/>

Props

• scriptUrl - Plausible script URL (domain is encoded in the URL) (or use env: NEXT_PUBLIC_PLAUSIBLE_SCRIPT_URL)
• defer - Use async loading (default: true)
• allowLocalhost - Enable in development (default: false)

Umami

import { Umami } from 'analytics-script';

<Umami 
  websiteId="your-website-id" 
  scriptUrl="https://cloud.umami.is/script.js"
/>

Props

• websiteId - Your Umami website ID (or use env: NEXT_PUBLIC_UMAMI_WEBSITE_ID)
• scriptUrl - Umami script URL (or use env: NEXT_PUBLIC_UMAMI_SCRIPT_URL)
• defer - Defer script loading (default: true)
• allowLocalhost - Enable in development (default: false)

DataFast

import { DataFast } from 'analytics-script';

<DataFast 
  websiteId="your-website-id" 
  domain="yourdomain.com"
  scriptUrl="https://datafa.st/js/script.js"
/>

Props

• websiteId - Your DataFast website ID (or use env: NEXT_PUBLIC_DATAFAST_WEBSITE_ID)
• domain - Your website domain (or use env: NEXT_PUBLIC_DATAFAST_DOMAIN)
• scriptUrl - DataFast script URL (or use env: NEXT_PUBLIC_DATAFAST_SCRIPT_URL)
• apiUrl - Custom API endpoint for sending events. Provide a full URL or a relative path (optional, or use env: NEXT_PUBLIC_DATAFAST_API_URL)
  • Example: https://api.example.com/events or /custom-events
  • Use case: Custom API endpoints, third-party analytics proxies, or advanced proxy configurations
• allowedHostnames - Comma-separated list of additional domains for cross-domain tracking (optional, or use env: NEXT_PUBLIC_DATAFAST_ALLOWED_HOSTNAMES)
  • Example: app.io,shop.example.com
  • Use case: Track users across different root domains
• defer - Defer script loading (default: true)
• allowLocalhost - Enable in development (default: false)
• allowFileProtocol - Enable tracking when opening HTML files directly in browser (file:// protocol) (default: false)
  • Use case: Testing with local HTML files
• debug - Enable debug mode to allow tracking inside iframes (default: false)
  • Use case: Testing tracking in embedded contexts
• disableConsole - Disable all console logging from DataFast tracker (default: false)
  • Use case: Clean console logs in production

Tracking Custom Goals/Events

Client-side Tracking:

import { trackDataFastGoal } from 'analytics-script';

// Simple goal tracking
<button onClick={() => trackDataFastGoal('signup')}>
  Sign Up
</button>

<button onClick={() => trackDataFastGoal('purchase')}>
  Buy Now
</button>

// Advanced usage with custom parameters
<button onClick={() => trackDataFastGoal('checkout_initiated', {
  name: 'Elon Musk',
  email: 'elon@x.com',
  product_id: 'prod_123',
})}>
  Checkout
</button>

Server-side Tracking:

Use server-side tracking in API routes, server actions, or backend code:

import { trackDataFastGoalServer } from 'analytics-script';

// Basic server-side tracking
const result = await trackDataFastGoalServer({
  apiKey: 'your_api_key',
  visitorId: 'visitor_123',
  goalName: 'newsletter_signup',
});

if (result.success) {
  console.log('Goal tracked successfully');
} else {
  console.error('Error tracking goal:', result.error);
}

// With metadata
const result = await trackDataFastGoalServer({
  apiKey: 'your_api_key',
  visitorId: 'visitor_123',
  goalName: 'newsletter_signup',
  metadata: {
    name: 'Elon Musk',
    email: 'musk@x.com',
  },
});

// With custom API URL (for self-hosted or proxy)
const result = await trackDataFastGoalServer({
  apiKey: 'your_api_key',
  visitorId: 'visitor_123',
  goalName: 'purchase',
  metadata: { amount: 99.99 },
  apiUrl: 'https://custom.datafa.st/api/v1/goals',
});

Example in Next.js API Route:

// app/api/track/route.ts
import { trackDataFastGoalServer } from 'analytics-script';
import { NextResponse } from 'next/server';

export async function POST(request: Request) {
  const { visitorId, goalName, metadata } = await request.json();

  const result = await trackDataFastGoalServer({
    apiKey: process.env.DATAFAST_API_KEY!,
    visitorId,
    goalName,
    metadata,
  });

  if (result.success) {
    return NextResponse.json({ success: true });
  } else {
    return NextResponse.json(
      { success: false, error: result.error },
      { status: 500 }
    );
  }
}

HTML data attributes - Reliable Tracking:

Add DataFastQueue before the main DataFast script to ensure events are captured even when triggered before the main script loads:

import { DataFastQueue, DataFast } from 'analytics-script';

// In your layout or _app.tsx
<head>
  <DataFastQueue />
  <DataFast 
    websiteId="your-website-id" 
    domain="yourdomain.com"
    scriptUrl="https://datafa.st/js/script.js"
  />
</head>

Props

• allowLocalhost - Enable in development (default: false)

Mixpanel

import { Mixpanel } from 'analytics-script';

<Mixpanel 
  token="your-mixpanel-token"
  autocapture={true}
  record_sessions_percent={true}
/>

Props

• token - Your Mixpanel project token (or use env: NEXT_PUBLIC_MIXPANEL_TOKEN)
• autocapture - Enable automatic event tracking (optional)
• record_sessions_percent - Enable session recording (true = 100%, false = 0%) (optional)
• allowLocalhost - Enable in development (default: false)

Crisp Chat

import { Crisp } from 'analytics-script';

<Crisp websiteId="your-crisp-website-id" />

Props

• websiteId - Your Crisp website ID (or use env: NEXT_PUBLIC_CRISP_WEBSITE_ID)
• allowLocalhost - Enable in development (default: false)

Google Analytics

import { GoogleAnalytics } from 'analytics-script';

<GoogleAnalytics gtagId="G-XXXXXXXXXX" />

Props

• gtagId - Your Google Analytics measurement ID (or use env: NEXT_PUBLIC_GOOGLE_TAG_ID)
• allowLocalhost - Enable in development (default: false)
• defaultConsent - Default consent settings for GDPR compliance (optional). Note: This only sets the default consent state, you need to implement your own cookie banner UI and update consent when users accept.

Sending Custom Events:

import { sendGAEvent } from 'analytics-script';

// Send a custom event
<button onClick={() => sendGAEvent('button_click', { category: 'engagement' })}>
  Click me
</button>

With Consent Mode (GDPR Compliance):

<GoogleAnalytics 
  gtagId="G-XXXXXXXXXX"
  defaultConsent={{
    ad_storage: 'denied',
    ad_user_data: 'denied',
    ad_personalization: 'denied',
    analytics_storage: 'denied'
  }}
/>

Note: For GDPR compliance, consider using a cookie consent library like:

• react-cookie-consent
• vanilla-cookieconsent

Example Code

using react-cookie-consent

1. Install a cookie consent library:

npm install react-cookie-consent

2. Complete Code

import { GoogleAnalytics, updateGoogleConsent } from 'analytics-script';
import CookieConsent from 'react-cookie-consent';

export default function App() {
  return (
    <>
      {/* Set default consent to denied */}
      <GoogleAnalytics 
        gtagId="G-XXXXXXXXXX"
        defaultConsent={{
          analytics_storage: 'denied'
        }}
      />

      {/* Cookie consent banner */}
      <CookieConsent
        location="bottom"
        buttonText="Accept"
        declineButtonText="Decline"
        enableDeclineButton
        onAccept={() => {
          // Update consent when user accepts
          updateGoogleConsent({
            analytics_storage: 'granted'
          });
        }}
        style={{ background: '#2B373B' }}
        buttonStyle={{ background: '#4CAF50', color: '#fff', fontSize: '14px' }}
        declineButtonStyle={{ background: '#f44336', color: '#fff', fontSize: '14px' }}
      >
        This website uses cookies to enhance the user experience.
      </CookieConsent>

      {/* Your app content */}
    </>
  );
}

using vanilla-cookieconsent

1. Install a cookie consent library:

npm install vanilla-cookieconsent

2. Complete Code

'use client';
import { GoogleAnalytics } from 'analytics-script';
import { useEffect } from 'react';
import 'vanilla-cookieconsent/dist/cookieconsent.css';
import * as CookieConsent from 'vanilla-cookieconsent';

export default function App() {
  useEffect(() => {
    CookieConsent.run({
      categories: {
        necessary: {
          enabled: true,
          readOnly: true
        },
        analytics: {
          enabled: false
        }
      },

      language: {
        default: 'en',
        translations: {
          en: {
            consentModal: {
              title: 'We use cookies',
              description: 'Cookie modal description',
              acceptAllBtn: 'Accept all',
              acceptNecessaryBtn: 'Reject all',
              showPreferencesBtn: 'Manage preferences'
            },
            preferencesModal: {
              title: 'Cookie preferences',
              acceptAllBtn: 'Accept all',
              acceptNecessaryBtn: 'Reject all',
              savePreferencesBtn: 'Save preferences',
              sections: [
                {
                  title: 'Analytics cookies',
                  description: 'These cookies help us improve our website.',
                  linkedCategory: 'analytics'
                }
              ]
            }
          }
        }
      },

      onConsent: () => {
        if (CookieConsent.acceptedCategory('analytics')) {
          window.gtag?.('consent', 'update', {
            analytics_storage: 'granted'
          });
        }
      },

      onChange: () => {
        if (CookieConsent.acceptedCategory('analytics')) {
          window.gtag?.('consent', 'update', {
            analytics_storage: 'granted'
          });
        } else {
          window.gtag?.('consent', 'update', {
            analytics_storage: 'denied'
          });
        }
      }
    });
  }, []);

  return (
    <>
      <GoogleAnalytics 
        gtagId="G-XXXXXXXXXX"
        defaultConsent={{
          analytics_storage: 'denied'
        }}
      />
      {/* Your app content */}
    </>
  );
}

---

Notes

• Production Only: By default, all components only render in production (NODE_ENV === "production")
• Environment Variables: Set props via environment variables (e.g., in .env.local)
• Development Testing: Use allowLocalhost={true} to test in development

Changelog

v0.7.0

• Add Crisp Chat support

v0.6.0

• Add Mixpanel support

v0.5.0

• Update DataFast script

v0.4.1

• Update new Plausible script

v0.4.0

• Add new Plausible script support
• Add Google Analytics Events support
• Add Google Analytics Consent Mode update function

v0.3.5

• Add Google Analytics Consent Mode Example Code

v0.3.3

• Add Google Analytics Consent Mode support (GDPR compliance)

v0.3.2

• Change React from dependencies to peerDependencies

v0.3.1

• Update GoogleAnalytics props

v0.3.0

• Add GoogleAnalytics support

v0.2.0

• Add DataFast support

v0.1.0

• Add Umami support
• Add allowLocalhost prop for development testing
• Fix TypeScript JSX type errors

v0.0.2

• Fix TypeScript type definitions

v0.0.1

• Initial release
• Add Plausible support

License

MIT