Rx.JS

Love this framework for asynchronous programming!

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What Is RxJS?

Using Observable.create for fine-grained control

P

Reacting to multiple inputs using RxJS's combineLatest

P

Overview of Cycle.js

Exporting values from components through sinks

Isolating component instances

Multiple independent instances of a component

Using the component in the main() function

Our first component: a labeled slider

Model-View-Intent pattern for separation of concerns

Body-Mass Index calculator built in Cycle.js

Using the HTTP Driver

An interactive counter in Cycle.js

Hello World in Cycle.js

From toy DOM Driver to real DOM Driver

Hyperscript as our alternative to template languages

Fine-grained control over the DOM Source

Making our toy DOM Driver more flexible

Generalizing run() function for more types of sources

Read effects from the DOM: click events

Introducing run() and driver functions

Customizing effects from the main function

Main function and effects functions

The Cycle.js principle: separating logic from effects

Event Delegation with RxJS

P

Yolk (An RxJS UI Library) in 7 Minutes

Reactive Programming - An overview of reactive concepts

P

Reactive Programming - Using cached network data with RxJS

P

Reactive Programming - Sharing network requests with RxJS merge

P

Reactive Programming - Clear data while loading with RxJS startWith

P

Reactive Programming - New requests from refresh clicks

P

Reactive Programming - Rendering on the DOM with RxJS

P

Reactive Programming - Async requests and responses in RxJS

P

Reactive Programming - Why choose RxJS?

P

Reactive Programming - Using an event stream of double clicks

P

Understand Reactive Programming using RxJS

Error Handling in RxJS

P

Introduction to the ConnectableObservable and using publish().refCount() in RxJS

P

Aggregating Streams With Reduce And Scan using RxJS

P

Demystifying Cold and Hot Observables in RxJS

RxJS - map vs flatMap

Toggle A Stream On And Off With RxJS

P

Stream Processing With RxJS vs Array Higher-Order Functions

P

Throttled Buffering in RxJS

P

RxJS Observables vs Promises

Creating An Observable with RxJS

rx tutorial about What Is RxJS?

What Is RxJS?

2:31 rx

RxJS Observables represent a collection of values over time, and can be accessed in familiar ways similar to arrays. RxJS can be thought of as underscore or lodash for asynchronous operations!

rx tutorial about Using Observable.create for fine-grained control

Using Observable.create for fine-grained control

3:55 rx PRO

Sometimes, the helper methods that RxJS ships with such as fromEvent, fromPromise etc don't always provide the exact values you want & you end up having to do extra work to force them into the shape you require. For more fine-grained control you can use Observable.create which allows you to project only the values which matter to you.

rx tutorial about Reacting to multiple inputs using RxJS's combineLatest

Reacting to multiple inputs using RxJS's combineLatest

7:36 rx PRO

There are certain situations in which you’ll want access to the latest values from multiple Observables whenever any one of them produces a value. This is exactly what combineLatest was designed for, and in this lesson we’ll use it to build up an image url that requires values from 3 different inputs - triggered every time any one of them change.

rx tutorial about Overview of Cycle.js

Overview of Cycle.js

2:28 rx

This lesson shows what can be learned next as a continuation of this course, and gives a recap on the core concepts: main for pure logic, drivers for side effects, run() to connect main and drivers, sources for read effects, sinks for write effects, and nesting Cycle.js apps to work as components.

rx tutorial about Exporting values from components through sinks

Exporting values from components through sinks

3:30 rx

Our app is not yet a BMI calculator, because it only has two sliders, but doesn't show the calculated BMI number. In this lesson we will learn how to export any stream from a child component and use it in the parent component, in order to display the BMI calculation on the DOM.

rx tutorial about Isolating component instances

Isolating component instances

3:39 rx

We added classNames to pre-processing and post-processing steps when calling the LabeledSlider, in order to instances independent of each other. It would be better if we could hide these steps away. This lesson introduces the isolate() helper function to achieve that.

rx tutorial about Multiple independent instances of a component

Multiple independent instances of a component

4:31 rx

Once we have a labeled slider component inside the main function, we should be able to create another labeled slider. This lesson teaches how to accomplish that, and make sure those two instances work independently of each other.

rx tutorial about Using the component in the main() function

Using the component in the main() function

1:57 rx

We have made a Cycle.js app for generic labeled slider which can be configured through props, but how can we reuse it in other Cycle.js apps? This lesson shows how we can embed any Cycle program inside a larger Cycle program in a very simple manner.

rx tutorial about Our first component: a labeled slider

Our first component: a labeled slider

8:05 rx

We are starting to get a better architecture for these UI apps. But we still have a problem of repeating code for the sliders, since they share so much in common in looks and functionality. This lessons shows how we can create a generic labeled slider as a main() function receiving properties as sources.

rx tutorial about Model-View-Intent pattern for separation of concerns

Model-View-Intent pattern for separation of concerns

3:17 rx

We built the BMI calculator all inside one function: main(). As apps scale, we don't want main() to grow. We need an organized pattern where each function focuses on doing one thing. This lesson shows how we can easily refactor the main() function into three parts: Intent, Model, and View.

rx tutorial about Body-Mass Index calculator built in Cycle.js

Body-Mass Index calculator built in Cycle.js

6:40 rx

So far we have been writing very small apps in Cycle.js. Let's start growing the size of the apps we build. This time, we will see how to build a simple Body-Mass Index Calculator.

rx tutorial about Using the HTTP Driver

Using the HTTP Driver

12:19 rx

Let's see next how to use the HTTP driver to generate requests and capture responses. We will build a small app to fetch a single piece of data from a REST server and display that on the DOM.

rx tutorial about An interactive counter in Cycle.js

An interactive counter in Cycle.js

8:08 rx

This lesson shows how we can create a more interactive app: a counter display with buttons to increment and decrement it. This reveals how we can use the RxJS scan() operator to remember past values and keep state.

rx tutorial about Hello World in Cycle.js

Hello World in Cycle.js

4:44 rx

Now you should have a good idea what Cycle.run does, and what the DOM Driver is. In this lesson, we will not build a toy version of Cycle.js anymore. Instead, we will learn how to use Cycle.js to solve problems. We will start by making a simple Hello world application.

rx tutorial about From toy DOM Driver to real DOM Driver

From toy DOM Driver to real DOM Driver

4:52 rx

This lessons shows how we are able to easily swap our toy DOM Driver with the actual Cycle.js DOM Driver, a more solid, more flexible, more efficient implementation.

rx tutorial about Hyperscript as our alternative to template languages

Hyperscript as our alternative to template languages

2:53 rx

Usually we use template languages like Handlebars, JSX, and Jade to create. One simple way we can create our own template language is to write a function that returns these objects for us. This lessons shows how we can use these functions as a DSL to create our DOM description objects.

rx tutorial about Fine-grained control over the DOM Source

Fine-grained control over the DOM Source

2:58 rx

What if we wanted to change the behavior of our app reset the timer every time the mouse hovers over it? Currently we only support clicks, and they are hard coded in the DOM Driver. This lesson will introduce DOMSource.selectEvents(), a way of making the DOM Source rich and allowing the main() function to determine which read effects it needs.

rx tutorial about Making our toy DOM Driver more flexible

Making our toy DOM Driver more flexible

5:22 rx

Our previous toy DOM Driver is still primitive. We are only able to send strings as the textContent of the container element. We cannot yet create headers and inputs and all sorts of fancy DOM elements. In this lesson we will see how to send objects that describe what elements should exist, instead of strings as the DOM sink.

rx tutorial about Generalizing run() function for more types of sources

Generalizing run() function for more types of sources

4:23 rx

Our application was able to produce write effects, through sinks, and was able to receive read effects, through the DOM sources. However, the main function only gets the DOMSource as input. This lessons shows how we can generalize main to receive an object of sources, containing all kinds of read effects that we can use.

rx tutorial about Read effects from the DOM: click events

Read effects from the DOM: click events

6:00 rx

So far we only had effects that write something to the external world, we are not yet reading anything from the external world into our app. This lesson shows how we can change the DOM Driver to return a "DOM Source" representing read effects, such as click events. We will leverage that to create an interactive application.

rx tutorial about Introducing run() and driver functions

Introducing run() and driver functions

4:06 rx

The last part of the code we wrote is neither logic nor effects. It is code which ties together logic (main) with effects. We can encapsulate that in a run() function. This lesson shows how we can structure these pieces together, and generalize effect handling with "drivers".

rx tutorial about Customizing effects from the main function

Customizing effects from the main function

2:05 rx

How can we show one string on the DOM, and a completely different string on Console log? This lesson shows how we can make our main function return multiple Observables, each one targeted at a different type of effect.

rx tutorial about Main function and effects functions

Main function and effects functions

2:10 rx

We need to give structure to our application with logic and effects. This lessons shows how we can organize our code into two parts: main() function for logic, and effects functions for effects.

rx tutorial about The Cycle.js principle: separating logic from effects

The Cycle.js principle: separating logic from effects

3:30 rx

This lesson is the first in an introduction to Cycle.js. We will see how to build from scratch a toy version of Cycle.js. See how to use RxJS to create simple web apps, and how to separate logic from effects.

rx tutorial about Event Delegation with RxJS

Event Delegation with RxJS

6:17 rx PRO

Event delegation is an extremely powerful technique. It allows you to use a single event handler to listen to events on any number of child elements. It also has the added benefit of working with dynamically added elements without even a single line of additional code. Libraries such as jQuery offer this feature right out of the box, but with RxJS and the fromEvent helper, we’ll need to utilise the selector function to achieve the same result. NOTE: The element.closest method shown in this video required a polyfill for older version of IE which can be found here https://github.com/jonathantneal/closest

rx tutorial about Yolk (An RxJS UI Library) in 7 Minutes

Yolk (An RxJS UI Library) in 7 Minutes

6:48 rx

Yolk is a small library that works in tandem with RxJS to render handle events and render out HTML using JSX. If you already understand RxJS, Yolk is a very simple addition to your front-end toolbelt. If you're just learning RxJS, Yolk is also an excellent way to practice using Observable and figuring out how they work together by building familiar UI applications.

rx tutorial about Reactive Programming - An overview of reactive concepts

Reactive Programming - An overview of reactive concepts

2:14 rx PRO

This video gives an overview of the concepts of reactive programming we saw during this series, and explains how reactive programming can provide true separation of concerns.

rx tutorial about Reactive Programming - Using cached network data with RxJS

Reactive Programming - Using cached network data with RxJS

7:44 rx PRO

In this lesson, we learn how to build the final feature of our user interface: how to use the cached network response to replace a suggested user when the user clicks on the 'x' close button for that user.

rx tutorial about Reactive Programming - Sharing network requests with RxJS merge

Reactive Programming - Sharing network requests with RxJS merge

3:34 rx PRO

This lesson teaches how to control whether network requests are cached or are pessimistically re-executed, with the help of the RxJS merge operator.

rx tutorial about Reactive Programming - Clear data while loading with RxJS startWith

Reactive Programming - Clear data while loading with RxJS startWith

6:28 rx PRO

Let's fix a small UI glitch that was occurring on startup and whenever the refresh button was clicked. In this lesson we will see how to avoid common bad habits of imperative programming, and how to use reactive programming to keep the complete dynamic behavior of a value specified in one convenient place.

rx tutorial about Reactive Programming - New requests from refresh clicks

Reactive Programming - New requests from refresh clicks

5:07 rx PRO

In this lesson we learn how to fetch new data whenever the refresh button is clicked. This lessons starts to give us a feeling of how is it to develop reactive applications in RxJS.

rx tutorial about Reactive Programming - Rendering on the DOM with RxJS

Reactive Programming - Rendering on the DOM with RxJS

5:22 rx PRO

Learn how to take data from a network response and display it on the DOM using RxJS reactive event streams.

rx tutorial about Reactive Programming - Async requests and responses in RxJS

Reactive Programming - Async requests and responses in RxJS

7:14 rx PRO

In this lesson we start building a small UI widget: suggestions box displaying users to follow in Github. We will learn how to perform network requests to a backend using RxJS Observables.

rx tutorial about Reactive Programming - Why choose RxJS?

Reactive Programming - Why choose RxJS?

4:05 rx PRO

This lesson helps you think in Reactive programming by explaining why it is a beneficial paradigm for programming. See how reactive programming helps you understand the dynamic behavior of a value evolving over time.

rx tutorial about Reactive Programming - Using an event stream of double clicks

Reactive Programming - Using an event stream of double clicks

4:36 rx PRO

See a practical example of reactive programming in JavaScript and the DOM. Learn how to detect double clicks with a few operators in RxJS.

rx tutorial about Understand Reactive Programming using RxJS

Understand Reactive Programming using RxJS

4:31 rx

This lesson introduces Reactive Programming using RxJS in simple terms, with a concrete example and no scary terminology.

rx tutorial about Error Handling in RxJS

Error Handling in RxJS

5:12 rx PRO

Get your code back on the happy path! This lesson covers a variety of ways to handle exceptions thrown by Observables in RxJS. Operators covered are: catch, onErrorResumeNext, retry and retryWhen

rx tutorial about Introduction to the ConnectableObservable and using publish().refCount() in RxJS

Introduction to the ConnectableObservable and using publish().refCount() in RxJS

3:56 rx PRO

An RxJS cold Observable can be made hot by declaring it with .publish().refCount(). What does publish() do? What does refCount() do? This lesson introduces the ConnectableObservable, and how to use it with publish and refCount.

rx tutorial about Aggregating Streams With Reduce And Scan using RxJS

Aggregating Streams With Reduce And Scan using RxJS

3:47 rx PRO

What is the RxJS equivalent of Array reduce? What if I want to emit my reduced or aggregated value at each event? This brief tutorial covers Observable operators reduce() and scan(), their differences and gotchas.

rx tutorial about Demystifying Cold and Hot Observables in RxJS

Demystifying Cold and Hot Observables in RxJS

3:50 rx

Have you ever been caught by complications surrounding Cold and Hot Observables with RxJS (Reactive Extensions for JavaScript)? Worry no more, there is only one "catch" to understand, and then the whole issue will make sense to you when developing reactive applications.

rx tutorial about RxJS - map vs flatMap

RxJS - map vs flatMap

2:35 rx

What is the difference between map and flatMap? How do you take an Observable of Observables and output a single stream? This lesson is a quick look at map and flatMap and how they relate.

rx tutorial about Toggle A Stream On And Off With RxJS

Toggle A Stream On And Off With RxJS

3:52 rx PRO

This lesson covers how to toggle an observable on and off from another observable by showing how to use a checkbox as a toggle for a stream of data.

rx tutorial about Stream Processing With RxJS vs Array Higher-Order Functions

Stream Processing With RxJS vs Array Higher-Order Functions

3:49 rx PRO

Higher order Array functions such as filter, map and reduce are great for functional programming, but they can incur performance problems. This lesson illustrates how stream processing with RxJS can save you from these pitfalls.

rx tutorial about Throttled Buffering in RxJS

Throttled Buffering in RxJS

3:41 rx PRO

Capturing every event can get chatty. Batching events with a throttled buffer in RxJS lets you capture all of those events and use them responsibly without overloading a subscriber downstream.

rx tutorial about RxJS Observables vs Promises

RxJS Observables vs Promises

6:53 rx

Let's look at some of the basic features of RxJS Observables as asynchronous primitives, by comparing them to their cousins, Promises.

rx tutorial about Creating An Observable with RxJS

Creating An Observable with RxJS

6:53 rx

Let's learn the basic anatomy of an RxJS Observable by creating one from scratch. In this lesson, we create a simple Observable. It covers handling asynchronicity, emitting values, observable completion and error handling.

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