lit-scan

Monitor and log Lit component rerenders in real-time.

Updated May 1, 2026
One-click install
npx skills add https://github.com/alvarosh15/lit-scan --skill lit-scan
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: lit-scan
Source: https://github.com/alvarosh15/lit-scan/tree/main
Command: npx skills add https://github.com/alvarosh15/lit-scan --skill lit-scan

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

LitScan solves the problem of inefficiently analyzing Lit web component rerenders, offering a streamlined approach to monitor and understand component behavior in real-time.

Core Features & Use Cases

  • Real-Time Rerender Visualization: Tracks and visually highlights component rerenders as they happen.
  • Render Count and FPS: Provides a live counter for each component's render count and a frames-per-second meter for performance analysis.
  • Anomaly Detection: Identifies components with unusually high render counts, indicating potential performance issues.
  • Zero-Config Integration: No changes to the app code are required for integration; simply import LitScan at the start of the application.
  • Use Case: Suppose you're working on a web application using Lit and notice that the user interface is lagging. With LitScan, you can quickly identify which components are causing the performance bottleneck.

Quick Start

Install and initialize LitScan at the start of your application's entry point. Then, interact with your app's UI to observe rerender behavior.

Frequently Asked Questions about lit-scan

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I monitor Lit web components for unnecessary rerenders?

To monitor Lit web components for unnecessary rerenders, you can use a real-time tracking tool that logs element updates and visually highlights rendering behavior as it happens. This helps identify performance bottlenecks without altering application code.

What is the best way to identify Lit components causing UI lag?

Identifying Lit components causing UI lag involves tracking render counts and frames-per-second (FPS) in real time. Anomaly detection highlights components with unusually high render counts, directly indicating potential performance issues.

How do I integrate a rerender visualization tool into my Lit application?

Integrating a rerender visualization tool into your Lit application requires zero configuration changes. You simply import the tracking module at the start of your application's entry point to initialize real-time component monitoring.

Does real-time Lit component tracking require modifying existing web development code?

Real-time Lit component tracking does not require modifying existing web development code. The zero-config integration approach lets you import the monitoring tool at the application entry point to immediately observe rerender behavior.

Why does my Lit web component rerender so frequently?

Lit web components rerender frequently due to reactive property updates triggering new render cycles. Using a tracking tool with a live render counter helps pinpoint which element updates are causing the excessive rendering behavior.