Documentation Index
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Structured JSON logger for Cloudflare Workers.
@latimer-woods-tech/errors and @latimer-woods-tech/monitoring.
npm install @latimer-woods-tech/logger
createLogger(opts)function createLogger(opts: {
service: string;
level?: 'debug' | 'info' | 'warn' | 'error';
context?: Record<string, unknown>;
}): Logger;
Loggerinterface Logger {
debug(message: string, context?: Record<string, unknown>): void;
info(message: string, context?: Record<string, unknown>): void;
warn(message: string, context?: Record<string, unknown>): void;
error(message: string, context?: Record<string, unknown>): void;
child(context: Record<string, unknown>): Logger;
}
console.log — Cloudflare Workers streams this to Logpush.
child(context)const requestLogger = logger.child({ requestId: c.req.header('x-request-id') });
requestLogger.info('Request received', { path: c.req.path });
import { createLogger } from '@latimer-woods-tech/logger';
const logger = createLogger({ service: 'my-app', level: 'info' });
logger.info('User signed in', { userId: 'user-123', tenantId: 'tenant-1' });
// {"level":"info","service":"my-app","message":"User signed in","userId":"user-123","tenantId":"tenant-1","ts":"2026-04-25T00:00:00.000Z"}