Question 1

How do I use Timing.js to measure first paint time in different browsers?

Accepted Answer

Include the script in your page or run it as a bookmarklet; it automatically normalizes firstPaint across Chrome, Opera, and IE11, and you can call timing.getTimes().firstPaint or use printSimpleTable() for a quick summary. For Firefox, support is experimental and may require adjustments.

Question 2

Timing.js vs web-vitals: which is better for performance monitoring?

Accepted Answer

Timing.js is ideal for cross-browser page load timing with a focus on first paint and basic metrics, while web-vitals provides more modern, user-centric metrics like LCP and CLS but with less emphasis on browser normalization. Choose Timing.js for quick diagnostics and web-vitals for comprehensive, user-focused analysis.

Question 3

Does Timing.js work with Safari or modern Edge browsers?

Accepted Answer

The README only specifies support for Chrome, Opera, IE11, and experimental Firefox; it may not fully normalize metrics for Safari or Edge without manual tweaks, as the library's cross-browser handling is limited to those listed browsers.

Question 4

How can I integrate Timing.js into a React application for debugging?

Accepted Answer

Install via npm and import it in your app, but since it's designed for page load timing, use it at the document level (e.g., in useEffect or componentDidMount) rather than per-component. Be aware that it may not align with React's lifecycle without additional setup.

Question 5

What extra metrics does Timing.js add over standard window.performance.timing?

Accepted Answer

It calculates metrics like firstPaintTime (firstPaint minus navigation start), domReadyTime, loadTime, redirectTime, requestTime, and connectTime, which are not directly available in the native API, helping identify specific performance stages.

Question 6

Is Timing.js still maintained and updated for modern web development?

Accepted Answer

Based on the README and project age, it appears stable but older, with no recent updates mentioned; it lacks modern tooling like ES6 modules or TypeScript, so it might not be the best choice for cutting-edge projects requiring active support.

Timing.js

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