JavaScript 2024 Roadmap

JavaScript is getting Record types to help with functional programming patterns. This enables creating immutable data structures for better performance and predictability.

const point = Record({ 
  x: 10, 
  y: 20 
});

// Immutable updates
const updated = point.with('x', 15);

Expected in a future spec. Stay tuned via the TC39 GitHub.

Write cleaner class declarations with static initializer blocks. No more workarounds for setting up complex static state or methods.

class MathUtil {
  static value = 42;

  static {
    console.log('Initializing static block');
    this.value *= 2;
  }
}

// Logs: 'Initializing static block'

New WeakRef and FinalizationRegistry APIs make it easier to manage memory in garbage-collected environments without breaking references.

Especially useful for large data caches and DOM element tracking.