ember-state-services
An Ember addon providing a state management pattern for medium-term state between singleton controllers and ephemeral components.
What is ember-state-services?
Ember State Services is an Ember.js addon that provides a state management pattern for handling medium-term state in ambitious applications. It addresses the gap between long-term singleton controller state and short-term ephemeral component state, preventing state loss and leakage in complex UI interactions. The addon offers reference-keyed state that persists beyond component destruction but remains isolated to specific model instances.
Ember.js developers building complex applications that require state persistence beyond component lifecycles, such as those implementing master/detail interfaces or forms with unsaved edits. It is particularly useful for developers who need to manage state that should not leak between different model instances.
Developers choose this addon because it provides a safe, middle-ground solution for state management, isolating state per reference key to prevent leaks while allowing persistence beyond component destruction. Its integration with computed properties via the `stateFor` helper and flexibility with custom state objects offer a structured approach to managing medium-term state in Ember applications.
Overview
Ember State Services is an addon that introduces a state management pattern for ambitious Ember.js applications. It addresses the gap between long-term singleton controller state and short-term ephemeral component state, preventing state loss and leakage in complex UI interactions.
Key Features
- Reference-Keyed State — Provides a unique state object per reference key (like a model), isolating state between instances.
- Medium-Term State Management — Offers state that persists beyond component destruction but doesn't leak between different model instances, ideal for scenarios like unsaved form edits.
- Flexible State Objects — Allows definition of custom state objects with initial state and integration with tools like
ember-buffered-proxy. - Computed Property Integration — The
stateForhelper returns a computed property that automatically provides the correct state object based on a changing reference.
Philosophy
The addon is designed to provide a safe and easy middle-ground solution for state that needs to outlive a component's lifecycle but should remain private and isolated to specific model references.
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