GoogleChrome/lighthouse

DevTools - Fireworks Bug

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#12,000 opened on Jan 26, 2021

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P3help wanted

Description

When scoring 100 points on Performance, Accessibility, Best Practices and SEO, fireworks start appearing. However after 10 seconds or so they start stuttering and glitching out before the full animation is played?

Contributor guide

Tech stack
javascripthtmlcss
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic understanding of CSS animationsfamiliarity with Chrome DevTools
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Investigate the fireworks animation implementation in the Lighthouse report UI. Likely located in the `report/` directory, specifically the JavaScript files that handle the confetti or fireworks effect. Check for any animation loop or timer that could cause stuttering after 10 seconds. Reproduce the bug by scoring 100 in all categories and observe the behavior. Look for any performance related issues or DOM manipulation that might degrade over time.