Polyfills the ResizeObserver API and supports box size options from the latest spec
Monitor if a component is inside the viewport, using IntersectionObserver API
Resize observer for React
React MutateObserver Component
A React hook that allows you to use a ResizeObserver to measure an element's size.
Reactive primitives for observing resizing of HTML elements.
OpenTelemetry metrics SDK
OpenTelemetry Collector Metrics Exporter allows user to send collected metrics to the OpenTelemetry Collector
A polyfill for the Resize Observer API
OpenTelemetry Collector Metrics Exporter allows user to send collected metrics to the OpenTelemetry Collector using protobuf over HTTP
<h1 align="center" style="border-bottom: none;">🔎 PerformanceObserver Polyfill</h1> <p align="center"> <a href="https://travis-ci.org/fastly/performance-observer-polyfill"> <img alt="Travis" src="https://img.shields.io/travis/fastly/performance-obs
Native metrics collector for libuv and v8
Resize observer for React
OpenTelemetry Collector Metrics Exporter allows user to send collected metrics to the OpenTelemetry Collector
A React hook for the IntersectionObserver API that uses a polyfill when the native API is not available
Client for prometheus
A React hook that fires a callback whenever ResizeObserver detects a change to its size
Buffered metrics reporting via the Datadog HTTP API
Detect if web fonts are available
🏯 PositionObserver is a JavaScript tool that provides a way to asynchronously observe changes in the position of a target element within its viewport.
An implementation and polyfill of the Resize Observer draft.
Tracks the intersection of a DOM element and its containing element or the viewport.
Real-time observability dashboard for babysitter orchestration runs
PM2.io NodeJS APM
Text-based UI for metrics-exporter-tcp.
A metrics-core compatible observer that outputs JSON.
A metrics-core compatible observer that outputs the Prometheus exposition output.
A metrics-core compatible observer that outputs YAML.
An RSpec formatter that collects test execution data and pushes it to the GitLab Observer service
One-line integration to send your Rails app's logs and metrics to the NurseAndrea observability platform.
Fluentd Plugin for converting JFrog Artifactory, Xray, RTFS generated metrics (Prometheus Exposition Format) to target observability platform format (Splunk HEC, New Relic, DataDog)
Fluentd Plugin for converting JFrog Artifactory, Xray generated metrics (Prometheus Exposition Format) to target observability platform format (Splunk HEC, New Relic, DataDog)
Ruby SDK for Obtrace observability platform. Captures logs, traces, and metrics via OTLP.
Ruby SDK for Obtrace observability platform. Captures logs, traces, and metrics via OTLP.
Deep Rails instrumentation that routes events to Pulse (APM), Recall (Logs), Reflex (Errors), Flux (Metrics), and Nerve (Jobs). One gem, full Rails observability.
Tasker is a comprehensive workflow orchestration engine that provides multi-step task processing, dependency management, state machine transitions, and enterprise observability features including OpenTelemetry tracing and Prometheus metrics for Rails applications.
Production-grade observability for Rails 8's Solid Stack. Monitor ActiveJob performance, track queue metrics, and debug issues with zero external dependencies. Built-in CLI, retention policies, and APM integrations.
E11y (Easy Telemetry) - Observability for Rails developers who hate noise. UNIQUE FEATURES: • Request-scoped debug buffering - buffers debug logs in memory, flushes ONLY on errors • Zero-config SLO tracking - automatic Service Level Objectives for HTTP endpoints and jobs • Schema-validated events - catch bugs before production with dry-schema DEVELOPER EXPERIENCE: • Minimal setup — one config block, works with stdout out of the box • Auto-metrics from events (no manual Yabeda.increment) • Rails-first design (follows Rails conventions) • Pluggable adapters (Loki, Sentry, OpenTelemetry, custom backends) COST SAVINGS: • Reduce log storage costs by 90% (request-scoped buffering) • Replace expensive APM SaaS ($500-5k/month → infra costs only) • Own your observability data (no vendor lock-in) PRODUCTION-READY: • Thread-safe for multi-threaded Rails + Sidekiq • Adaptive sampling (error-based, load-based, value-based) • PII filtering (GDPR-compliant masking/hashing) • Performance optimized (hash-based events, minimal allocations) Perfect for Rails 7.0+ teams who need observability without complexity or high costs.
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