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NodeJS

Avoid common Node.js mistakes — event loop blocking, async error handling, ESM gotchas, and memory leaks.

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版本1.0.1

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技能说明

name: NodeJS slug: nodejs version: 1.0.1 description: Write reliable Node.js avoiding event loop blocking, async pitfalls, ESM gotchas, and memory leaks. metadata: {"clawdbot":{"emoji":"💚","requires":{"bins":["node"]},"os":["linux","darwin","win32"]}}

Quick Reference

Topic	File
Callbacks, Promises, async/await, event loop	`async.md`
CommonJS vs ESM, require vs import	`modules.md`
Error handling, uncaught exceptions	`errors.md`
Readable, Writable, Transform, backpressure	`streams.md`
Memory leaks, event loop blocking, profiling	`performance.md`
Input validation, dependencies, env vars	`security.md`
Jest, Mocha, mocking, integration tests	`testing.md`
npm, package.json, lockfiles, publishing	`packages.md`

Critical Traps

fs.readFileSync blocks entire server — use fs.promises.readFile
Unhandled rejection crashes Node 15+ — always .catch() or try/catch
process.env values are strings — "3000" not 3000, parseInt needed
JSON.parse throws on invalid — wrap in try/catch
require() cached — same object, mutations visible everywhere
Circular deps return incomplete export — restructure to avoid
Event listeners accumulate — removeListener or once()
async always returns Promise — even for plain return
pipeline() over .pipe() — handles errors and cleanup
No __dirname in ESM — use fileURLToPath(import.meta.url)
Buffer.from(string) — encoding matters, default UTF-8

如何使用「NodeJS」？

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