Helpers for Serverless Node.js Functions

What this post added

This post introduces default helpers for serverless Node.js functions on Vercel, including `request.query`, `request.cookies`, `request.body`, `response.status()`, `response.json()`, and `response.send()`. These helpers simplify common tasks like parsing GET parameters, accessing cookies, and handling request bodies, and provide standardized methods for constructing responses. Benchmarks indicate performance gains compared to basic Express.js applications.