@studnicky/v8/define-property

Disallows Object.defineProperty(...). Changing property descriptor flags after object creation forces V8 to transition to a new hidden class or fall back to dictionary mode, invalidating all previously compiled inline caches for that shape.

Fixable: No · Options: No · Suggested severity: error

✗ Incorrect

Object.defineProperty(obj, 'id', { value: 1, writable: false });

Object.defineProperty(proto, 'name', {
  get() { return this._name; },
  enumerable: true
});

✓ Correct

// Declare non-writable shapes at construction time via class fields
class Entity {
  readonly id: number;
  constructor(id: number) { this.id = id; }
}

// Use getter methods instead of property descriptors
class Named {
  private _name: string;
  constructor(name: string) { this._name = name; }
  get name(): string { return this._name; }
}