Why might this pattern be useful in a component system?
const store = new WeakMap();
class Component {
constructor() {
store.set(this, {
state: {},
listeners: new Set()
});
}
setState(newState) {
const data = store.get(this);
data.state = { ...data.state, ...newState };
data.listeners.forEach(listener => listener(data.state));
}
}
This pattern is useful because: 1) It provides truly private state that can't be accessed from outside, 2) Component instances and their state are automatically cleaned up when no longer referenced, 3) No explicit cleanup code is needed when components are destroyed, 4) It prevents memory leaks in component-based architectures, 5) The pattern scales well with many component instances, 6) It maintains encapsulation while enabling garbage collection, 7) The approach is particularly valuable in dynamic UI systems, 8) It demonstrates how WeakMap can improve component lifecycle management.