reactive. To be reactive is to be ready to react or respond to something else — as opposed to ready to act on one's own. A person who's reactive does things only in response to others. To react is to do something in response to something else. When someone pinches you, for example, you react.
Proactive and reactive behavior. To refresh your memory, being reactive means that you don't take any initiative or make strategic decisions in life, you just go where life kicks you; and then you react to what happens to you, sometimes with positive, but more often with negative feelings.
Other examples of reactive language include: “There's nothing I can do.” ;“ That's just the way I am.”; “ S/he makes me so mad.”; “ They won't allow that.”; “ I have to do that.”; “
Reactive language. Embraces responsibility and takes charge of the situation. Nothing is left to chance. If something is being done, it's not because we are forced to it, but because we choose to do it. And proactive language exuberates this.
Reactive communications, as the name suggests, is when you're reacting to a situation. It's something you haven't planned for, something unexpected, something that has caused a response you didn't foresee. This type of communications normally takes place after the fact – when something has already happened.
A proactive approach focuses on eliminating problems before they have a chance to appear and a reactive approach is based on responding to events after they have happened. The difference between these two approaches is the perspective each one provides in assessing actions and events.
Proactive public relations refers to the ability of an organization to take control of the PR message that's being relayed to the general public and aim to get the word out before anything bad can occur.
State management makes the state of your app tangible in the form of a data structure that you can read from and write to. It makes your 'invisible' state clearly visible for you to work with.
State management refers to the management of the state of one or more user interface controls such as text fields, OK buttons, radio buttons, etc. in a graphical user interface. In this user interface programming technique, the state of one UI control depends on the state of other UI controls.
State Management can be defined as the technique or the way by which we can maintain / store the state of the page or application until the User's Session ends.
At its core, Redux is really a fairly simple design pattern: all your "write" logic goes into a single function, and the only way to run that logic is to give Redux a plain object that describes something that has happened. Redux puts some basic constraints on how that write logic function should work.
React is a state management library
When you build a React application, you're assembling a bunch of components to make a tree of components starting at your <App /> and ending at your <input /> s, <div /> s and <button /> s.RxJS (Reactive Extensions for JavaScript) is a library for reactive programming using observables that makes it easier to compose asynchronous or callback-based code. See (RxJS Docs). Converting existing code for async operations into observables. Iterating through the values in a stream.
Introduction. Redux is a reactive state management library developed by Facebook and used in the React library. This library is based on the Flux pattern. RxJS (Reactive Extensions for JavaScript) is a library based on the Observable pattern that is used in Angular to process asynchronous operations.
Architecture. Both Angular and React have component-based architecture, which means they have cohesive, reusable and modular components. But, the difference comes at the point of tech stack. React uses JavaScript while Angular goes with Typescript for web development which is more compact and error-free.
NgRx is basically kind of Redux Store for Angular Application. Using NgRx store you can create your store, effects , reducers & actions in any angular app. On the other hand RxJS is used for mainly for consuming api data and creating shared services using subject etc.
Redux provides a predictable state container. It is inspired by Flux and helps you implement a one-way data flow in your Angular applications. This allows you to understand what is going on in your system in a more predictable way.
The code for this app is available here.
- Create an Angular App With Angular CLI. ng new angular-state-management.
- Load the Project Into the IDE (I'm Using IntelliJ IDEA)
- Run the App.
- Install NgRx.
- Create a Customer model.
- Add Actions.
- Add a Customer Reducer.
- Add an NgRx Store to the App.
Redux is a reactive state management library developed by Facebook and used in the React library. To use Redux in the Angular framework, we can use the NgRx library. This is a reactive state management library. With NgRx, we can get all events (data) from the Angular app and put them all in the same place (Store).
The code for this app is available here.
- Create an Angular App With Angular CLI. ng new angular-state-management.
- Load the Project Into the IDE (I'm Using IntelliJ IDEA)
- Run the App.
- Install NgRx.
- Create a Customer model.
- Add Actions.
- Add a Customer Reducer.
- Add an NgRx Store to the App.
From the documentation for the AngularJS UI-Router, A state corresponds to a "place" in the application in terms of the overall UI and navigation. A state describes (via the controller / template / view properties) what the UI looks like and does at that place.
Store is RxJS powered state management for Angular applications, inspired by Redux. Store is a controlled state container designed to help write performant, consistent applications on top of Angular.
RxJS (Reactive Extensions for JavaScript) is a library for reactive programming using observables that makes it easier to compose asynchronous or callback-based code. The library also provides utility functions for creating and working with observables.
The reducer creates a new state as described by the specified action and returns it to the store. Once the store updates with the new state, it will notify the UI and all dependent components. Each UI reacts to the state change and its view gets updated to reflect the changes.
Store is RxJS powered state management for Angular applications, inspired by Redux. Store is a controlled state container designed to help write performant, consistent applications on top of Angular.
Redux is a predictable state container for JavaScript applications. It helps you write applications that behave consistently, run in different environments (client, server, and native), and are easy to test. Simply put, Redux is a state management tool.
Observable are just that — things you wish to observe and take action on. Angular uses the Observer pattern which simply means — Observable objects are registered, and other objects observe (in Angular using the subscribe method) them and take action when the observable object is acted on in some way.
All of the above Angular 2 components are stateless. They have no knowledge of their surroundings, but are passed data via property bindings and emit changes via event callbacks.
Angular State
Let's call such component arrangements router states. In other words, a router state is an arrangement of application components that defines what is visible on the screen. RouterState and RouterStateSnapshot. During a navigation, after redirects have been applied, the router creates a RouterStateSnapshotAn application state is simply the state at which an application resides with regards to where in a program is being executed and the memory that is stored for the application. The web is "stateless," meaning everytime you reload a page, no information remains from the previous version of the page.
A BehaviorSubject is a type of observable (i.e. a stream of data that we can subscribe to like the observable returned from HTTP requests in Angular). It will always return a value, even if no data has been emitted from its stream yet.
How to implement the Ngrx/store into your code
- Clone the todo-app-angular repo.
- Set up Ngrx/store. Add @ngrx/store to the app; $ npm install @ngrx/store --save.
- Finishing the ADD_TODO action. Open the todo-data.
- Creating the other actions.
- Some optional cleanup.
