Reactive Change Detection
How can runtime know about changes? 🔎 Polling: Periodic reconciliation 🎇 Events: Occurrence of an event 🤝 Links: List of subscribers 🔎 Polling States store only values and that’s it. Runtime periodically checks the current value with the previous one. And if they differ, it triggers reactions. // sometimes if( state !== state_prev ) reactions() This is how Angular, Svelte, and React work, for example. The problem with this approach is that for every sneeze, a lot of work is done, only to find out that almost nothing has changed. It may seem to you that ordinary comparison is a