A small set of helpers for working with the Navigation Timing API to measure web application performance.
Timing.js is a JavaScript library that provides helper functions for working with the Navigation Timing API to measure web application performance. It normalizes timing data across different browsers and adds calculated metrics to help developers understand where their applications spend time during loading and rendering.
Frontend developers and web performance engineers who need to measure and analyze page load times and identify performance bottlenecks in web applications.
Developers choose Timing.js because it simplifies working with the Navigation Timing API, provides cross-browser consistency for critical metrics like first paint, and offers convenient visualization tools without requiring complex setup or dependencies.
Navigation Timing API measurement helpers
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Normalizes firstPaint timing across Chrome, Opera, and IE11 for consistent measurements, as explicitly listed in the README's features, addressing browser inconsistencies.
Adds useful calculated metrics like firstPaintTime, domReadyTime, and connectTime, which are derived from the Navigation Timing API to provide deeper insights into performance bottlenecks.
Includes printSimpleTable() and printTable() methods that output readable tables in the browser console, making it easy to visualize timing data without additional tools, as shown in the README screenshots.
Can be used as a standalone script, DevTools snippet, or bookmarklet, offering versatility for different development workflows, as highlighted in the installation and usage sections.
Only normalizes firstPaint for Chrome, Opera, and IE11; Firefox support is experimental via MozAfterPaint and not fully integrated, reducing its usefulness for modern browser environments.
Relies on deprecated tools like Bower and older npm scripts, with no mention of recent updates or ES6+ features, suggesting potential compatibility issues and lack of active development.
Focuses solely on the Navigation Timing API without extending to Resource Timing or User Timing APIs, limiting comprehensive performance analysis compared to more modern libraries.