Owner

Every reactive node in Aitne belongs to an owner. The owner tree manages lifecycle — when an owner is cleaned up, all its children, effects, and resources are disposed automatically.

Why Ownership Matters

When components are created and destroyed (e.g., navigating between pages), their resources must be cleaned up: event listeners removed, timers cleared, network requests aborted. The owner system handles this automatically.

How It Works

The owner tree mirrors the component tree:

• When a component is created, it gets an owner
• Effects, signals, and memos created inside a component are scoped to that owner
• When a component is removed, its owner is disposed, which cleans up everything under it

Manual Cleanup

Effects can register cleanup callbacks that run when their owner is disposed:

@reactive.create_effect(fn(_) {
  let timer = @ffi.set_timeout(fn() { /* ... */ }, 1000)
  @reactive.on_cleanup(fn() {
    @ffi.clear_timeout(timer)
  })
})

This pattern is essential for timers, subscriptions, and any resource that needs explicit teardown.

Automatic Cleanup in Views

When a view is mounted with mount_to_body and later destroyed, the owner system automatically disposes everything created during that view’s lifetime. You only need to write on_cleanup for manual resources.