Package Exports

@segment/analytics-node
@segment/analytics-node/dist/cjs/index.js
@segment/analytics-node/dist/esm/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@segment/analytics-node) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

@segment/analytics-node

https://www.npmjs.com/package/@segment/analytics-node

OFFICIAL DOCUMENTATION (FULL)

https://segment.com/docs/connections/sources/catalog/libraries/server/node

LEGACY NODE SDK MIGRATION GUIDE:

https://segment.com/docs/connections/sources/catalog/libraries/server/node/migration

Runtime Support

Node.js >= 14
AWS Lambda
Cloudflare Workers
Vercel Edge Functions
Web Workers (experimental)

Quick Start

Install library

# npm
npm install @segment/analytics-node
# yarn
yarn add @segment/analytics-node
# pnpm
pnpm install @segment/analytics-node

Usage

Assuming some express-like web framework.

import { Analytics } from '@segment/analytics-node'
// or, if you use require:
const { Analytics } = require('@segment/analytics-node')

// instantiation
const analytics = new Analytics({ writeKey: '<MY_WRITE_KEY>' })

app.post('/login', (req, res) => {
   analytics.identify({
      userId: req.body.userId,
      previousId: req.body.previousId
  })
  res.sendStatus(200)
})

app.post('/cart', (req, res) => {
  analytics.track({
    userId: req.body.userId,
    event: 'Add to cart',
    properties: { productId: '123456' }
  })
   res.sendStatus(201)
});

Settings & Configuration

See the documentation: https://segment.com/docs/connections/sources/catalog/libraries/server/node/#configuration

You can also see the complete list of settings in the AnalyticsSettings interface.

Plugin Architecture

See segment's documentation for plugin architecture.

Usage in non-node runtimes

Usage in AWS Lambda

AWS lambda execution environment is challenging for typically non-response-blocking async activites like tracking or logging, since the runtime terminates / freezes after a response is emitted.

Here is an example of using analytics.js within a handler:

const { Analytics } = require('@segment/analytics-node');

// since analytics has the potential to be stateful if there are any plugins added,
// to be on the safe side, we should instantiate a new instance of analytics on every request (the cost of instantiation is low).
const analytics = () => new Analytics({
      flushAt: 1,
      writeKey: '<MY_WRITE_KEY>',
    })
    .on('error', console.error);

module.exports.handler = async (event) => {
  ...
  // we need to await before returning, otherwise the lambda will exit before sending the request.
  await new Promise((resolve) =>
    analytics().track({ ... }, resolve)
   )

  ...
  return {
    statusCode: 200,
  };
  ....
};

Usage in Vercel Edge Functions

import { Analytics } from '@segment/analytics-node';
import { NextRequest, NextResponse } from 'next/server';

export const analytics = new Analytics({
  writeKey: '<MY_WRITE_KEY>',
  flushAt: 1,
})
  .on('error', console.error)

export const config = {
  runtime: 'edge',
};

export default async (req: NextRequest) => {
  await new Promise((resolve) =>
    analytics.track({ ... }, resolve)
  );
  return NextResponse.json({ ... })
};

Usage in Cloudflare Workers

import { Analytics, Context } from '@segment/analytics-node';

export default {
  async fetch(
    request: Request,
    env: Env,
    ctx: ExecutionContext
  ): Promise<Response> {
    const analytics = new Analytics({
      flushAt: 1,
      writeKey: '<MY_WRITE_KEY>',
    }).on('error', console.error);

    await new Promise((resolve, reject) =>
      analytics.track({ ... }, resolve)
    );

    ...
    return new Response(...)
  },
};