Learn Chrome, Ionic and Particle

Optional chaining ?. in javascript is a new feature introduced in ES2020. Optional chaining changes the way properties are accessed from deeply nested objects. It fixes the problem of having to do multiple null checks when accessing long chain of object properties in javascript.

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

Optional Chaining

Chrome DevTools are incredibly useful for a frontend developer, sometimes we spend more time using them than our text editor of choice.

That's why it's so important to understand this tool better - those quick lessons will teach you things that will help you to become a more effective developer.

You will learn how to:

- **Use (experimental) CSS Overview to learn all about CSS used on a page in a minute**
- **Style console.log messages with CSS** - a _crucial_ skill for any senior developer (j/k)
- **Debug your code (on production and local environment) with logpoints**
- **Run a Lighthouse audit of your site**
- **Choose accessible colors for your website that have an AAA contrast ratio rating**
- **Force a DOM element state in Chrome DevTools**
- **Use Console utilities to make debugging easier**
- **Copy a network request as fetch or cURL with Chrome DevTools**

Have fun!

The Chrome Developer Tools (DevTools for short), are a set of web authoring and debugging tools built into Google Chrome.

chrome-devtools

Chrome DevTools tips & tricks

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

In this course we’ll take a deep look at the Elements panel in the chrome devtools. We’ll step through each button and tab on this panel and discuss how to use them to interact with your web application as it runs.

Debug the DOM in Chrome with the Devtools Elements Panel

This course examines the Sources panel in the Chrome DevTools, which allows you to see what files are responsible for the various things on the screen. Bundled into this panel, though, is the single most useful tool for any JavaScript developer - the JavaScript Debugger. We’ll use the Debugger to inspect JavaScript as it runs, allowing you to watch (and even interact with) the state of your application as it runs in ways that’ll blow your mind if you’ve mostly used console.log to debug your applications to this point. 

Debug JavaScript in Chrome with DevTool Sources

This course will examine the Network panel in Chrome DevTools. We’ll step through the request log, examining the various properties exposed. We’ll talk about timing, filtering, throttling and generally using the network panel to better understand the ways in which our applications exist within a connected context.

Debug HTTP with Chrome DevTools Network Panel

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

This is a small collection of videos to help you get familiar with Chrome browser's performance oriented developer tools.
In this collection, learn how to record a performance profile, tweak the settings to get the most relevant profile and finally a look into the different sections of the performance data visualisation.

Basics of Chrome's Performance Devtools

Anything related to JavaScript performance

Javascript Performance

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

 AJAX allows us to send requests to the server from our javascript applications, rather than allowing the browser to directly request declaratively specified resources. Under the hood, though, AJAX requests are still just HTTP requests - and that means we can use the Network Panel in Chrome’s DevTools to inspect our AJAX operations!


Examine AJAX Requests with Chrome Devtools

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. 

Install the Genymotion Android Emulator for Ionic

In this lesson, we install Ionic. With just a couple command prompt commands, we gain access to the powerful Ionic command-line utility, which in turn installs Apache Cordova to aid in connecting our web apps to our mobile device’s native functionality. After this lesson, we will be able to create and run and app.

Ionic Quickstart for Windows: Installing Ionic

To understand the Network DevTool, you have to understand what HTTP is and how it works. Let’s use the Network DevTool to inspect an HTTP request and its corresponding response so that we can understand what the browser is doing.

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