FastLED JavaScript Linting Tools

This directory contains JavaScript linting tools for the FastLED project, using Node.js + ESLint for fast JavaScript validation.

Via Main Lint Script (Recommended)

# JavaScript linting is included by default (fast only!)
bash lint

Setup

The fast JavaScript linter is automatically installed during project setup:

# Installs everything including fast JS linting
./install

Or manually install just the JavaScript linter:

uv run ci/setup-js-linting-fast.py

This will:

• Download Node.js binary to .js-tools/node/
• Install ESLint to .js-tools/node_modules/
• Create ESLint configuration in .js-tools/.eslintrc.js
• Create fast linting script .cache/js-tools/lint-js-fast

Philosophy: Fast Only

JavaScript linting follows a "fast only" policy:

• ✅ Fast linting available: Uses Node.js + ESLint (~0.9 seconds)
• ⚠️ Fast linting unavailable: Skips JavaScript linting entirely
• ❌ No slow fallback: Fast linting or no linting at all

Configuration

The fast linter only checks for critical runtime issues:

• no-debugger - Prevents debugger statements in production
• no-eval - Prevents eval() security vulnerabilities

No style enforcement - focuses on critical issues only for maximum speed.

Integration

JavaScript linting is included by default in bash lint when fast linting is available.

Performance

• Fast linting: ~0.9 seconds (53x faster than previous solution)
• Total lint time: ~1.6 seconds (Python + C++ + JavaScript)