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

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

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!

Deploy a Serverless API React Application with TypeScript

Gesture driven lists are a great way to take a simple UI element and make it fun. We'll look at how we can make swipe-able list items to reveal additional functionality, as well as being able to drag and reorder list items.

Use Sliding Gestures to Reorder an Ionic 2 List

In this lesson we will walk through how to break out code into it's own provider using the CLI. Ionic’s CLI provides a generate command that will quickly help create common components, pipes, providers, and much more. To see what kind of generators are available, run `ionic g --list` in your terminal. 

Use the Ionic CLI to Generate Angular 2 Mobile Components

The simplest way to display data in an app is with a simple listview. This list will go over how items work and how to place certain elements in ion-items position slots.

Build your first page component with Ionic 2

Ionic offers a few different layouts, including a side menu-based one. We’ll setup a simple side menu layout from scratch and see how it behaves on different devices. For instance, if you're users are on an Android device, the side menu (and really, the whole app) will look and behave like a native Android app. As the user swipes from the side, the menu will overlay the main content. For iOS, the menu will not move, but the app's main content will instead. 

Create a Native Mobile Side Menu Layout in Ionic 2

Ionic’s NavController offers an extensive API that allows you to manipulate your apps history, create history from nothing, and programmatically navigate back. NavController has an extensive API with many methods and lifecycle hooks that developers can use. Be sure to check out the [documentation](http://ionicframework.com/docs/api/navigation/NavController/)

Use Ionic 2 NavController to Manipulate App History

A common UI pattern in mobile apps is to be able to “pull” down on a list and fetch more data, or scroll and load more. This kind of pattern is built into Ionic with the ionRefresher component and ionInfiniteScroll component.


[Infinite Scroll](http://ionicframework.com/docs/2.3.0/api/components/infinite-scroll/InfiniteScroll/) and [Refresher](http://ionicframework.com/docs/2.3.0/api/components/refresher/Refresher/) can be heavily customized as well. Both components allow you to change what is shown as the user begins to perform their action. This allows for a much more customized experience!

Lazy Load Data with Ionic 2

Ionic 2 has it’s own navigation system that that makes it straightforward to link components. We’ll look at how to take data from one template and pass it to another using Ionic NavController. 

Instead of thinking in terms of URLs and hrefs, NavController allows devs to think in terms of a component stack. To navigate forward to a new view, a developer pushes a new component on to the navigation stack. To go back, the component is popped from the stack. This push/pop metaphor is borrowed from traditional native development and allows for a more flexible navigation paradigm.  

Navigate Between Mobile Screens  with the Ionic 2 NavController

Ionic’s CSS and JS can detect what platform a user is on, and adjust to make sure you’re getting the correct interface. To preview this locally, you can use the CLI’s `--lab` flag to see what your app will look like before it’s even deployed to a device.


Preview an Angular 2 Mobile  App with Ionic Lab

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

immutable

There are lots of techniques for accessing data kept in your Lists. In this lesson, we will compare how data stored in collections can be accessed directly in both standard Arrays and ImmutableJS Lists. We will also look at how to find data inside an Immutable List using the `findEntry` and `findIndex` methods.

Get items in an ImmutableJS List

The reduce function in ImmutableJS allows you to transform and create new data from an existing data structure. In this example, we will do some math and calculate a sum based on data in an ImmutableJS Map.

Calculate a sum using reduce in ImmutableJS

Ionic provides a common API for displaying many overlay components, like Alerts, ActionSheet, Modals, and Popovers. We'll look at a few of the APIs and see how to interact with them. To learn more about these different APIs, be sure the view the documentation on them:

- [ModalController](http://ionicframework.com/docs/2.3.0/api/components/modal/ModalController/)
- [ViewController](http://ionicframework.com/docs/2.3.0/api/navigation/ViewController/)
- [AlertController](http://ionicframework.com/docs/2.3.0/api/components/alert/AlertController/)

Create an Overlay Component with the Ionic 2 Overlay API

Cards have become a common way to handle layout and display information in a easy-to-understand format. Ionic offers utility components that make creating cards straightforward. These components, like `ion-card`, `ion-card-content`, and `ion-card-header` are included in the framework to speed up the development process. There's no JavaScript behind these components, they're really just css driven. 

Create Angular 2 Mobile Card based layouts with Ionic 2

We’ll go over requirements needed to create a project and how to install the ionic CLI for project creation. Once it’s installed, we’ll start a project, specify an app name, and reuse a starter template for our project.


Start an Ionic 2 App with the CLI

A typical app will interact with some sort of remote API at some point. We’ll creating a simple provider class to fetch data from the Random User API and populate our apps UI with this data.

The `IonicModule` in this lesson provides some default Angular modules for convenience. As of Ionic 2.x.x, those modules include Angular's `BrowserModule`, `HttpModule`, `FormsModule`, and `ReactiveFormsModule`


Fetch data from an API using Angular 2 HTTP module 

The key to being productive with Immutable JS is understanding how to update values that are nested. Using `setIn` you can place a new value directly into an existing or new path. If you need access to the previous value before setting the new one, you can use `updateIn` instead. `updateIn`  accepts the same path lookups as `setIn`, but gives you a callback function instead so that you can use the previous value however you wish and return an updated version.

Updating nested values with ImmutableJS

ImmutableJS reduce functions can be nested to get data out of complex data structures. In this example, we will create an Immutable List from an Immutable Map that is nested inside of an Immutable List that is itself nested inside of an Immutable Map.

Create a list with nested reduce functions in ImmutableJS

By utilizing immutable data structures, we can write code that is easier to reason about, avoid mutation-related bugs, reduce complexity, and even gain some performance benefits along the way.

Before diving too far into Facebook's [Immutable.js](https://facebook.github.io/immutable-js/) library, let's take a moment to examine some of the pains and obstacles that mutable data structures present. 

We'll take a brief glimpse at putting the Immutable "List" data structure to work by example. We will convert our usage of Javascript's native `Array` to use [Immutable.List](https://facebook.github.io/immutable-js/docs/#/List) in order to address a mutation-related "bug" caused by multiple objects "sharing" a mutable structure (array) by reference.

Immutable.js: Introduction - Easing the Pains of Mutability

In this lesson we'll look at some of the differences between standard JavaScript Arrays and Immutable Lists. We'll create Immutable.JS Lists from scratch, as well as by converting regular Arrays. We will also compare and contrast the `push` and `concat` methods between both types of collection.

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