 Resources from John Lindquist in 2021

JavaScript is full of inconsistent APIs. Wrapping those APIs in functions allows you to have full control over how to configure them and make them more reusable.

This becomes even more beneficial when dealing with the async nature of JavaScript. You'll learn how a broadcaster is a function that wraps another function (which we call listeners) and modifies the behavior. We will build up this pattern in a way that allows you to compose broadcasters together making your code more reusable.

**You're in Section 02 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

JavaScript® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles.

javascript

Establish Callback and Closure patterns Around Async Browser Behaviors

In the previous section, [07 Building Light Search Box](https://egghead.io/playlists/building-light-search-box-bb64), we implemented a search box with the pattern that we've built in this course. This works great but doesn't have as much business logic applied as other async scenarios.

In this section, we will implement a word game where the values coming in from the user will be piped to different listeners to be consumed. Along the way, complex business logic will be applied to determine if the user won the game or not.

**You're in Section 08, the last of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Implementing a Word Game with Patterns and React

In this section, we will introduce another concept to the pattern that we've created: 

**Operators**.

Operators are the final big piece that allows us to bend all asynchronous behaviors to our will. They give us a chance to redefine broadcasters and listeners in any way we want. 

We'll several operators throughout this section to implement mapping, filtering, and piping behaviors (and more!).

By the end, you'll get a real sense of how you can continue building on top of the functionality you've already built.

**You're in Section 03 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Use the Callback and Closure Pattern to Build Advanced Async Behaviors

Like in section [04 Implement the Pattern in Common Async Scenarios](https://egghead.io/playlists/implement-the-pattern-in-common-async-scenarios-c059), it's time to implement the pattern in common scenarios!

Now that you're familiar with the pattern we'll build a search box that handles a few different async scenarios.

You'll filter values based on user input, debounce text while a user is typing, and send a request once they are finished. Finally, we'll see how to implement a cache to save on network requests

**You're in Section 07 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

React is one of the web’s most popular frameworks for building JavaScript applications. 

If you know what you’re doing, React can drastically simplify how you build, use, and maintain code.

Whether you’re a React newbie or you’re ready for advanced techniques, you can level-up with egghead. Explore our in-depth courses, lessons, and community resources to build more powerful applications and crack open your career.

react

Building Live Search Box

It's time to introduce a "View" to our codebase so that we can present the values in the DOM. Since React is the most popular View library, we'll convert our basic JavaScript project to a React project to demonstrate how this pattern fits.

We'll create several hooks (`useCallback`, `useListener`, `useBroadcaster`) in this section to see how you could implement the pattern in react terms.

By the end of the section, you'll know how user input is handled and how to fetch resources in React with this pattern

**You're in Section 06 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Bringing the Pattern into React

The concept of 'done-ness' is not something that is often considered when writing functions in JavaScript — you end up just running out of data or a function stops getting called.

There are many async scenarios that make sense to signal that work is completed. 

By following a completion pattern, we can easily trigger repetition and sequencing (async or not) into our code.

**You're in Section 05 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Use a Completion Pattern to enable Repetition and Sequencing

Now that you've been introduced to the pattern in-depth, let's implement it in a few common Async Scenarios.

You'll notice the benefits of re-using broadcasters through different scenarios as well as tweaking behavior through operators like when to start and stop code.

**You're in Section 04 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223)**

Implement the Pattern in Common Async Scenarios

Before we dive deep into the pattern of composing callbacks and closures, we need to take start with the definitions and basic building blocks that we will be using for the rest of the course. 

You'll be able to answer questions like:

- What is a Closure?
- What is a Callback?
- Why does Callback Hell happen and how can we handle it?

We will see that by establishing a contract between functions and holding to the pattern that is established, you will have gained a lot of power and flexibility in writing reusable, robust functions.

**You're in Section 01 of [Composing Closures and Callbacks in JavaScript](https://egghead.io/playlists/composing-closures-and-callbacks-in-javascript-1223).**

Introduction to Callbacks, Broadcasters, and Listeners

Animations attract the eye and add a higher level of engagement for your users. But they’re not easy to set up, and they don’t always look the way they should on every browser. 

Greensock is the best platform available for creating performant, highly-customizable animations. This course will walk you through the features of Greensock, including how to:

- animate an element
- manually control an animation
- animate between CSS classes

…and more, with cross-browser support to ensure your animations look sharp everywhere.

Ultra high-performance, professional-grade HTML5 animation for the modern web

greensock

Create Amazing Animations with GreenSock

The only better feeling than deleting code is automating away mundane tasks. This playlist shows off many variations of tasks that can be automated away with tools like zsh functions, alfred, and karabiner. These techniques apply broadly to the small development tasks you tackle every day.

Bite-size video tutorials for badass web developers.

egghead

Automate Everything: An egghead Guide to Productivity

_Feels like magic._

It’s a beautiful feeling when technology works in mysterious, miraculous ways. So smooth! So effortless! So…

_Wait, that’s not right. What’s it doing? I don’t get it. Help!_

…until you encounter unexpected behavior. Good luck debugging magic.

To use technology to its fullest, you need to understand how it’s accomplishing the tasks set before it. 

This course de-mystifies RxJS. It feels like magic, but it’s also one of the most laborious technologies to learn in front-end web development. We’ll open up the internals to take an up-close look at how RxJS handles Async programming so smoothly.

Over 12 lessons and 31 minutes, you'll get a handle on:

- how RxJS pushes values from observables to subscribers, which take care of the output. 
- how operators handle all of the "in-between" operations where you can manipulate the values while they're still in-flight.
- the internals of operators and subscribers and how to customize operators to your specific needs.


RxJS is a library for composing asynchronous and event-based programs by using observable sequences. 


rxjs

Build Your Own RxJS Pipeable Operators

The first question you ask after installing TypeScript is "What do I do now?" In this course you'll learn about using the TypeScript compiler, configuring your project, definition files, and all the ins-and-outs of understanding how to use TypeScript in your project.

TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

typescript

Up and Running with TypeScript

A collection of lessons about generators in JavaScript to help developers understand how useful they can be in many common scenarios.

Generators in JavaScript

***Note: RxJS imports have changed since the publication of this course, these changes to RxJS have been reflected in the code examples underneath each lesson. The concepts being taught on RxJS are still applicable.***

Vue.js is an amazing framework that can easily update and reflect user input using templates and data-binding. But there are many scenarios where complex asynchronous behaviors (like loading data, handling "pending" states, timeouts, etc) are solved much easier by leveraging the streaming capabilities of RxJS. This course covers how to setup and use the features of "vue-rx" to enable streams within your templates and easily solve complex scenarios.

Vue (pronounced /vjuː/, like view) is a progressive framework for building user interfaces. Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable. The core library is focused on the view layer only, and is very easy to pick up and integrate with other libraries or existing projects. On the other hand, Vue is also perfectly capable of powering sophisticated Single-Page Applications when used in combination with modern tooling and supporting libraries.

Build Async Vue.js Apps with RxJS

***Note: Active maintenance for Recompose has been discontinued since the announcement for React hooks. Your existing code using Recompose will still work. Recompose is not compatible with RxJS version 6 and beyond. You can read more about the decision [here.](https://github.com/acdlite/recompose/issues/756#issuecomment-438674573)*** 


Loading data and handling events almost always introduces layers of complexity into React apps. Recompose and RxJS solve your async problems by using Streams to output components. This course walks you through combining the powers of React and RxJS to stream data into JSX with streaming patterns and pure React components.

Build React Components from Streams with RxJS and Recompose

Vue is known for being super easy to pick up and quickly build great applications using the built-in template bindings and directives. As your application grows in complexity, you'll need finer control of your components.

In this course, we’ll define where content of a component should land when you define the content inside of a parent component with Vue slots and manage that relationship with slot-scope. We’ll continue with dynamic and async Vue components as well as use JSX inside Vue for complete JavaScript control of your components. 

This course provides an overview of Advanced Vue.js Components with quick demonstrations on how to leverage Vue Component patterns.

Advanced Fine-Grained Control of Vue.js Components

When setting up a modern JavaScript app, we find ourselves trudging through the land of infinite configuration. Poi offers us an option of zero-configuration by providing sane defaults and hiding them away until you need to tweak a change to suit your needs.

webpack is a tool to build JavaScript modules in your application. To start using webpack from its cli or api, follow the Installation instructions. webpack simplifies your workflow by quickly constructing a dependency graph of your application and bundling them in the right order. webpack can be configured to customise optimisations to your code, to split vendor/css/js code for production, run a development server that hot-reloads your code without page refresh and many such cool features.

webpack

Make Webpack Easy with Poi

This course walks you through the steps of creating a News web app using Vue.js and the Nuxt framework. You will learn how to create dynamic pages for each section of your application and load, store, display, filter, and style the data. Then end result will be a News app with multiple category pages, comments for each section, and user pages.

Create a News App with Vue.js and Nuxt

As a developer, you'll often make use of APIs that have you pass in a callback function. For example, adding event listeners or using various other DOM or Node APIs.

What's less common is writing your own code that makes use of callbacks. Many developers know *what* a callback is, but not the why or how of implementing them in their projects.

A callback is a function that you pass to another function, so that the function that you pass it to controls the invocation of that function.

To help keep things straight, John Lindquist calls the innermost callback the Listener, and the function it gets passed into the Broadcaster.

Think of it as one function *broadcasting* values to another function that is *listening* for them. 

These Broadcaster-Listener callback relationships can be composed to solve problems in the realm of timing, buffering, and caching.

This pattern of composing callbacks is the foundation of RxJS and other libraries that handle complex async scenarios.

In this course, John Lindquist guides you from a blank JavaScript file all the way through creating a library of reusable functions not unlike those found in RxJS. The difference is you'll be writing from scratch.

You'll learn techniques for solving Callback Hell with composition, implementing debouncing, and building a word game among several other examples.

Using callbacks in code is a major pattern in JavaScript, and learning to work with them effectively will take your problem-solving skills to the next level.

Composing Closures and Callbacks in JavaScript

Vue.js has a first-class ecosystem to help construct Vue.js apps. This includes Nuxt.js which enables server-rendered applications and a page-based approach. 

This course will start with an empty app and walk through how to use Vue.js for building the app, Nuxt.js for organizing the app, and Vuex for managing state.

Build a Server Rendered Vue.js App with Nuxt and Vuex

This is the video companion to the [egghead.io Instructor Guide](https://howtoegghead.com/instructor/).

Screencasting is hard! There are virtually infinite ways to produce one. For an egghead.io lesson we expect several key aspects to be met. We want to make sure that our lessons have depth and clarity. Clarity is important and starts with the technical aspects of recording your screen and voice. Once we have achieved this objective level of clarity, we dip into the stylistic aspects of recording a lesson. The style is subjective, and the goal of an egghead.io lesson is not to have an army of uniform drone producing flavorless video content for the masses.

Our mission is to make you a badass screencaster. We want to push you to another level. We've found that a small set of standard practices will create an awesome experience for the student, and eliminate frustration as we teach by providing a repeatable pattern for success. It’s not complicated. In fact, it is simple, but it isn’t easy.


This course will show you how to produce an egghead.io lesson. We strive for consistency in style, and these lessons will demonstrate the core elements that create our brand screencasts. Let’s learn how together.

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John Lindquist

Script Kit