@eristack/logger

JSON-lines structured logging for Node services — request context, levels, Express middleware, Nest interceptor.

Install

pnpm add @eristack/logger

Quick example

import { createLogger } from "@eristack/logger";

const log = createLogger({ name: "orders" });
log.info("order.created", { orderId: "ord_1" });

Express:

import { createLoggerMiddleware, getRequestLogger } from "@eristack/logger/express";

app.use(createLoggerMiddleware({
  resolveContext: (req) => ({ userId: req.user?.id }),
}));

Docs

• Overview
• Getting started

Intent: @eristack/logger#logger-core