Lighthouse
Lighthouse is an open-source, automated auditing tool built by Google that analyzes a webpage and generates scored reports covering performance, accessibility, SEO, and best practices, along with specific recommendations for improvement.
11 resources across 2 libraries
Glossary Terms(6)
Progressive Web App (PWA)
A Progressive Web App (PWA) is a website built with modern web APIs to behave like a native app — installable, capable of offline use, and able to send push no…
Service Worker
A service worker is a JavaScript script that a browser runs in the background, separate from a web page, enabling features like offline caching, push notificat…
Web Accessibility (a11y)
Web accessibility (often abbreviated a11y) is the practice of designing and building websites so people with disabilities — including visual, auditory, motor,…
SEO
SEO (Search Engine Optimization) is the practice of improving a website's structure, content, and technical performance so it ranks higher in search engine res…
Core Web Vitals
Core Web Vitals are a set of standardized metrics defined by Google that measure real-world user experience on a webpage — specifically loading performance, in…
Lighthouse
Lighthouse is an open-source, automated auditing tool built by Google that analyzes a webpage and generates scored reports covering performance, accessibility,…
Interview Questions(5)
How Do Lighthouse Audits Work and What Do They Measure?
Lighthouse is an automated auditing tool that loads a page in a controlled, throttled environment and scores it across Performance, Accessibility, Best Practic…
What Is the Time to Interactive (TTI) Metric?
Time to Interactive (TTI) is the point at which a page has rendered its content and the main thread is quiet enough that the browser can reliably respond to us…
What Is First Contentful Paint (FCP)?
First Contentful Paint (FCP) is the time from navigation start until the browser renders the first piece of DOM content — text, an image, a non-white canvas, o…
What Is Total Blocking Time (TBT)?
Total Blocking Time (TBT) sums up the portion of every main-thread task, between First Contentful Paint and Time to Interactive, that exceeds 50 milliseconds —…
What Is the Speed Index Metric?
Speed Index measures how quickly the visible content of a page is painted during load by scoring the visual completeness of the viewport at every recorded fram…