Highlights from CityJS Medellín 2024

Express.js

Requires Node.js ≥ 18

• Express.js v5 is here! After a decade without major upgrades, v5 brings updates, including changes in route path matching, removal of deprecated methods, and improved promise rejection handling. No more next(error)
  • For details, check out this article: What's New in Express 5.
  • Discussion on the new roadmap: GitHub Discussion.
• Goal: Allow the Node ecosystem to move towards faster, more efficient APIs.

Node Permission Model — Experimental

Note: Experimental features should not be used in production

• Permission Model: An experimental feature allowing developers to restrict access to specific resources during execution.
  • Restrict access to the file system, child processes, and worker threads.
  • Goal: Improve Node.js security, recognizing that developers can be targeted by attackers. This risk increases when installing libraries, as they may contain unintentional vulnerabilities.
  • Tip: Check for known vulnerabilities in your Node.js setup using is-my-node-vulnerable.

Prompt Techniques

• Slides and Exercises: Canva Presentation Prompt Exercises
• Key Techniques:
  • Provide context: Define the role (e.g., "You're an expert in Y with an interest in X, focusing on Z.")
  • Consistency: Keep messaging steady, as you're guiding the language model.
  • n-shot prompting: Task without examples, with one example, or with a few examples.
  • Define responsibilities: e.g., "You're responsible for identifying X in Y."
  • Manage variable inputs using tags.
  • Set tone: Specify tone—professional, expert, Gen Z, etc.
  • Affirmations and rewards: "I'll tip you 30% if..."
  • Check for hallucinations in responses.

GIS Maps

• GIS (Geographic Information Systems): Use GIS for logistics and spatial analysis. Here's a list of some GIS libraries:
  • Geospatial Talk Resources

AI on the Browser

New and Experimental

• AI on Browsers: Thanks to WebGPU API, which enables the use of GPU for complex computations, and WebAssembly, there are now tools to implement AI directly in browsers.
  • Chrome's AI tools: Chrome Developer AI Resources
  • Goal: Prioritize user data privacy while leveraging their computer's processing power.
  • Tip: Explore the AI assistant in Chrome DevTools.

MiduDev

Talk

• Highlights JS new features
  • Array.findLast()
  • New array methods immutable .toReversed(), .toSorted(), to.Spliced()
  • Array immutable method to change a value .with(index, newValue)
• Proposals JS
  • Signals, Records, Tuplas.
• Highlights HTML y CSS new features
  • Tag search
  • Attribute switch
  • Native tooltip with popovertarget
  • Added aling-content: center support to display block
  • To balance tittle break line text-wrap:balance
  • New on CSS Animations: view(), animation-timeline,@starting-style
  • View transitions API
• Proposals HTML
  • Attribute command and commandfor
• Tip: Baseline 2024 Web Platform Baseline brings clarity to information about browser support for web platform features.