Learn Immutable, Ionic and Serverless

Starting from a prebuilt frontend, Jason Lengstorf guides you through the creation of a "Corgi Up-boop App" that uses Netlify Functions and Hasura. You can view [the deployed final product on Netlify](https://egghead-serverless-functions.netlify.app/).

You'll set up the Netlify CLI, and configure a local development environment before writing and deploying functions with a few different use cases.

The first example function bypasses CORS restrictions to retrieve corgi data from an example third-party API.

Next, you'll configure environmental variables to securely communicate with the Unsplash API without exposing private keys to the client.

Serverless functions don't persist data by themselves, so we will use  Hasura to create a GraphQL API for tracking the number of "boops" each corgi receives.

This course is an excellent illustration of the speed of Serverless functions, and how fast you can implement functionality in your web applications.

An all-in-one workflow that combines global deployment, continuous integration, and automatic HTTPS.

netlify

Build a Corgi Up-boop Web App with Netlify Serverless Functions and Hasura

Theming Ionic applications is a topic that is often left undiscussed. Ionic has a robust API to theme your application so you don't have to settle with the default styles.

This course will show you how Ionic’s theming system works so that your application can have its unique look. It will explore the built-in utilities, which you can leverage directly.

You'll be introduced to the built-in CSS utilities that Ionic provides, Ionics grid system, and Ionic configuration settings to create a custom look and feel to your App.

Ionic is the beautiful, free and open source mobile SDK for developing native and progressive web apps with ease.

ionic

Style and Theme Ionic v3 Applications

Building native mobile applications has traditionally been a completely foreign work flow than web development. Recently frameworks, such as Ionic and React Native, have been come out to create a similar web development workflow in a native environment. 

Ionic 2 builds on top of Angular to offer a complete framework for building mobile apps using HTML, CSS, and Javascript that target native mobile and the browser. We’ll work with the RandomUser API to create an employee directory that will let us view user details, update that information, and pass the data back and forth with Ionic 2 routing.

Angular is a development platform for creating applications using modern web standards. Angular includes a wealth of essential features such as mobile gestures, animations, filtering, routing, data binding, security, internationalization, and beautiful UI components. It's extremely modular, lightweight, and easy to learn.

angular

Building apps with Ionic 2

Ionic allows you to build cross platform native applications using Angular. In this course we will convert the Eggly AngularJS application into an Ionic mobile application.

AngularJS is an open-source JavaScript framework, maintained by Google, that assists with running single-page applications. Its goal is to augment web-based applications with model–view–controller (MVC) capability, in an effort to make both development and testing easier.

angularjs

Building an Angular 1.x Ionic Application

Welcome to the *Ionic Quickstart* series where you will learn how to get started with Ionic from the ground up. We will begin with how to install the required dependencies such as Node.js, Android SDKs and even GenyMotion to installing and running Ionic. By the time you finish, you will know how to create, edit and run an Ionic application. If you are on Windows or Mac and not sure where to start with hybrid mobile development, this is a great place to start!

Ionic Quickstart for Windows and Mac

im·mu·ta·ble i(m)ˈmyo͞odəb(ə)l/ adjective - **unchanging over time or unable to be changed**.

Mutating data is the source of never ending headaches in software systems, and JavaScript code is no exception. Immutable data structures, pure functions, uni-directional data flow... you've probably been hearing these terms.

Immutable.js provides us the data structures and utilities that we need to start introducing this powerful concept of immutability into our applications.

Immutable.js provides many Persistent Immutable data structures including: List, Stack, Map, OrderedMap, Set, OrderedSet and Record.

immutable

Learn how to use Immutable.js

Create a serverless application and deploy it in under thirty minutes!

We'll be using Netlify, Vite, TypeScript, and React in our project. This stack synergizes extremely well for rapidly developing professional-quality applications. 

If you haven't heard of Vite, it's the French word for quick! It's also a build tool that consists of a dev-server and an extremely fast bundler. It makes for a rapid development loop.

As for the rest. Netlify makes hosting fast and easy with serverless functions and continuous deployment. React enables you to quickly create reusable components. And TypeScript helps you write cleaner code that is easier to refactor. 

So get started and learn how to use this stack in your own applications!

Create a TypeScript powered serverless React application

In this lesson, we install the Android Software Development Kit (SDK) and the necessary Android API (Application Interface). This is the code base that allows us to run the Android platform on our PC. We also add a couple environment variables and update our PATH environment variable.

Install Android SDK for Ionic

In this lesson, we learn how to install Ionic and Cordova. We then build an app from scratch using the Ionic CLI and a blank starter template.

Build and Run an Ionic App from Scratch

In this lesson, we learn how to build a sidebar layout using only Ionic directives. Ionic provides some powerful functionality with very few semantics. Here are all the directives we will learn about:
- **ion-side-menus** - A container element for side menu(s) and the main visible content.
- **ion-side-menu-content** - A container for the main visible content, sibling to one or more `ionSideMenu` directives.
- **ion-side-menu** - A container for a side menu, sibling to an `ionSideMenuContent` directive.
- **ion-nav-view** - Used to render templates in your application. Each template 
is part of a state. States are usually mapped to a url, and are defined programatically 
using angular-ui-router (see their docs for reference).
- **ion-view** - A container for view content and any navigational and header bar information. Used as a child of `ionNavView`.
- **ion-nav-bar** - If we have an `ionNavView` directive, we can also create an 
`ionNavBar`, which will create a topbar that updates as the application state changes.
- **ion-nav-buttons** - Use nav buttons to set the buttons on your `ionNavBar` 
from within an `ionView`.
- **ion-content**- Provides an easy to use content area that can be configured 
to use Ionic’s custom Scroll View, or the built in overflow scrolling of the browser.
- **ion-list** - The List is a widely used interface element in almost any mobile app, and can include 
content ranging from basic text all the way to buttons, toggles, icons, and thumbnails.
- **ion-item** - Used to create items inside of an `ionList`.

Build a Sidebar Layout with Ionic

In this lesson, we are going to dig into Ionic lists and make use of some awesome list features that Ionic gives us for free. We are going to learn how to use the following Ionic directives:

- **ion-nav-buttons** - Use nav buttons to set the buttons on your `ionNavBar`.
- **ion-list** - The List is a widely used interface element in almost any mobile app, and can include 
content ranging from basic text all the way to buttons, toggles, icons, and thumbnails.
- **ion-item**- Used to create items inside of an `ionList`.
- **ion-delete-button** - A child of `ionItem`, this element allows a developer to show/hide a delete button within an `ionItem` with ease.
- **ion-reorder-button** - A child of `ionItem`, this element allows a developer to reorder an `ionItem` within a list easily.

Build a Powerful List with Ionic

Immutable.js offers methods to break  immutable structures into subsets much like Array--for instance it has the all powerful slice()--and unlike Array it offers functional methods like take() and skip(). You get the best of both the imperative and functional worlds.

Working with Subsets of an Immutable.js Map()

Equality checking deeply nested objects is painful. Fortunately Immutable.js makes this task easy with its .is() and .isSubset() methods. Let's see how we can take two different Immutable Maps() and check for equality.

Equality Checking with .is() and More

Immutable.js offers the fromJS() method to build immutable structures from objects and array. Objects are converted into maps. Arrays are converted into lists. The fromJS() method can also take a reviver function for custom conversions.

Using fromJS() to Convert Plain JavaScript Objects into Immutable Data

Understanding Immutable.js's Map() and List() structures will likely take you as far as you want to go with immutable programming. They have only small semantic differences between each other and the remaining structures in the Immutable.js family. Sequence, however, has one major difference: it's lazy--which opens a new realm of functional possibilities. Let's write a simple sequence to start.

Exploring Sequences and Range() in Immutable.js

Immutable.js iterables offer the reduce() method, a powerful and often misunderstood functional operator on which map(), filter(), groupBy(), etc. are built. The concept is simple: reduce transforms your iterable into something else, that's all. The name is misleading as you may or may not actually "reduce" anything. Let's replicate the groupBy() and filter() methods with reduce to illustrate how it works.

Transforming Immutable Data with Reduce

While Immutable.js offers .is() to confirm value equality between iterables it comes at the cost of referencing each key and value in both objects. For lightning fast equality checks, Immutable.js can produce a hash code based on an iterable's content. If two iterables have the same content, their hash codes will be the same. It's worth noting that this technique is unsuitable for mission critical application development since there is a chance, however slight, that checksums like these might collide. This is outlined here: https://en.wikipedia.org/wiki/Collision_(computer_science)

Lightning Fast Immutable.js Equality Checks with Hash Codes

The Immutable.js Record() allows you to model your immutable data much like you would model data with native Javascript classes or objects. It differs from native classes because it cannot be mutated after it's creation and it *always* has a default value. It's an excellent construct in which to piece together your stores, be them Flux or some other storage implementation. Let's quickly create an Immutable Record().

Immutable.Record() as data models

In this lesson, we are going to turn two forms into Angular directives in preparation for turning them into Ionic modals. This isn’t a complicated step, but it puts us in a better place for creating the modals.

Convert a UI Route into an Angular Directive

In this lesson, we quickly demonstrate how to edit our code and re-run our app. The pertinent piece of the puzzle is knowing where the code for the HTML/Javascript/CSS is. Once we know where that is, editing it and running the app is a cinch!

Edit Your Ionic Application Code

In this lesson, we install Genymotion, which allows us to create virtual Android devices on our PC.  We could use the Android emulators provided by the Android SDK, but on Windows this proves to be problematic. Most Android developers that operate on a PC opt for using Genymotion, not only because it’s faster, but because it provides easy access to testing different native functions of Android devices, such as the camera, microphone, accelerometer, etc. 