<h2>Introduction to the course</h2><p>React offers a wide range of solutions to every front-end engineer&#x27;s needs. It has a constantly developing and growing community that aims at striving in web development. All that, combined with an efficient and scalable JavaScript library, any complex User Interface is generated in the most straightforward and easy steps. This course will expand on all the ins and outs of React&#x27;s concepts and techniques.</p><h2>Who is this course for?</h2><p>If you’ve interacted with Facebook then you’ve already interacted with its baby –React. Think of everything Facebook offers, feed updates, alerts and notification, and real-time messages from your friends, all thank to React. If you want the huge range of opportunities React brings to the table as a cutting-edge, open-source, and easy-to-learn front-end library, then this course is meant for you.</p>

React

<h2>What does this section cover?</h2><p>React highly supports the logic behind JSX. This in essence entails an unbreakable bond between rendering and User Interface. </p><p>The lesson brings forward the importance and significance of that bond, how it&#x27;s incorporated into React logic and works for the benefit of the developer.</p><p></p>

JSX / DOM

<h2>What does this lesson cover?</h2><p>React components, types of components and their end-to-end coverage induces a fulfilling and efficient application. </p><p>These JavaScript-powered functions return chunks of UI on webpages. Here’s everything you need to know to use them for what they’re meant for as an exceptional user interface provider.</p>

Introduction / First React Component

<h2>What does this lesson cover?</h2><p>React components, each and every single one of them, have a lifecycle. Developers, on the other hand, are given the opportunity to monitor components during their lifecycle.</p><p>This section will uncover those phases and give developers a better perspective on how to work with (change, monitor) components.</p>

Lifecycle Methods

<h2>What does this lesson cover?</h2><p>We&#x27;ll be expanding on the most used approaches of Styling React applications. They are CSS Style Sheets, Inline CSS, SASS/SCSS,  CSS Modules, and CSS in JS. These approaches paired with the right projects help developers achieve the most out of the style of their website.</p>

Styling Components

<h2>What does this lesson cover?</h2><p>Here’s the right way to set up your development environment. In this lesson, you’ll find yourself learning all the intricacies that a once simple one-click installation entails.</p><p>Though, not necessarily complex, evaluating your options and reading the fine lining when installing could save you a lot of time in the future. </p><p>Note, that if developers choose to limit themselves to the one-click installation, they can still work with React. However, a dynamic coding experience requires a little extra.</p>

Installing React

<h2>What does this lesson cover?</h2><p>Every DOM object you encounter in React has its corresponding virtual DOM object. </p><p>This lesson will cover the concept of Virtual DOM and why exactly its use is crucial when working in React, alongside its prominent feature of &quot;virtually&quot; representing User Interface (UI) and how it&#x27;s kept in sync with the DOM. </p>

Virtual DOM

<h2>What does this lesson cover?</h2><p>The way components actually work is an important nuance that developers should not leave uncharted. We&#x27;ll refer to handling and communicating methods with props, in short –passing data with props.</p><p>This specific aspect deems important as it touches on the one-way data flow structure of the component hierarchy. This entails differentiating between child components and parent components.</p>

Components Advanced

<h2>What does this lesson cover?</h2><p>Hooks are one of the most innovative features that React has to offer. React Hooks are a newer concept in React that entails the simplification of using states and more features without using classes.</p><p>In the lesson, we expand on the three W&#x27;s: When Why and Where use Hooks.</p>

Hooks

<h2>What does this lesson cover?</h2><p>Working with new build tools that incorporate tons of dependencies could seem overwhelming to the naked, inexperienced eye. This lesson aims at breaking down the complicated exterior that newbies face when associating with their first-ever React application. After all, React thrives in securing a simple, efficient experience and developers have no choice but to work it to their advantage.</p>

Creating a React Application

Lesson Challenge

<h2>What does this lesson cover?</h2><p>React has the special ability that “forces” you to think about your application as you develop its every feature. </p><p>This lesson tries to explain that power a little bit better by taking you on a step-by-step journey that discovers the logic behind your standard building process.</p>

Thinking in React

<h2>What does this lesson cover?</h2><p>The beauty of React is that a single application can contain hundreds of components and their combination forms.</p><p>This lesson introduces the different ways components interact. Even though components make up a React application, what makes React so exceptional is the way components interact with each other.</p>

Components Render Other Components

<h2>What does this lesson cover?</h2><p>Side effects are a constant bump in the road for developers who work with class-based components in React. Most of the time these side effects can hinder the entire application execution process. </p><p>This lesson uncovers how to act to avoid side effects and where to be cautious about them.</p>

Handling Side Effects

<h2>What does this lesson cover?</h2><p>In React, developers can create isolated components that contain the behavior you need. </p><p>React&#x27;s Conditional Rendering is utilized to create elements that represent the current state, and to insure efficiency, React immediately updates them to match the UI. Conditional Rendering is widely used among developers and we expand on it quite thoroughly in this lesson. </p>

Conditional Rendering

<h2>What does this lesson cover?</h2><p>Most websites nowadays come equipt with some sort of list, whether it be a navigation menu or a timeline list, they&#x27;ve become an inseparable part of the UI (User Interface), hence the importance of Rendering Lists.</p><p>Rendering Lists in React incorporates knowledge of the map method and keys, therefore, we&#x27;ll be summarizing those concepts as well to aid developers with a step-by-step guide on everything you need to know about Rendering Lists.</p>

Rendering Lists

<h2>What does the lesson cover?</h2><p>We’ll talk about the backbone of React flexibility and brilliance in executing UIs. The approach tackles all complexities that could’ve gotten in the way of developer experience but instead work towards its max simplification. The bits of code that bring components to life, React attributes, and the list goes on.</p>

Introduction

<h2>What does this lesson cover?</h2><p>We’ll expand on everything you’d find if you were to analyze React to its core. Components- its lifeline, the DOM, The Virtual DOM, Diffing, and Keys. What you pick up here are the fundamentals of your web development journey with React. Complicated terminology aside, what you see is what you get with React concepts and approaches.</p>

Core Concepts

DOM Overview

<p><strong>Defining DOM. </strong>The Document Object Module (DOM) is an API (application programming interface) for XML and HTML. The main purpose of DOM is to define the structures, accessibilities, and manipulations of documents.</p>

<p>The downside of DOM is that it&#x27;s slow. Thus, to make the process faster, a <strong>virtual DOM </strong>is implemented, which is the DOM tree representation in JavaScript. The purpose of the virtual DOM is to effectively and efficiently update DOM in the browser.</p>

Select Correct Answer

JSX Overview

<p><strong>Defining JSX. JSX (JavaScripy XML) </strong>is a JavaScript extension that permits developers to define elements of React through a syntax that is not too unlike HTML/XML structures. The usage of JSX comes from the artificial feel of using <strong><samp>createElement()</samp></strong> methods when placing elements in the <strong>DOM</strong>.</p>

<p>JSX permits developers to write DOM-like structures while working in a file that contains JS code. The processor will thus turn the expressions into JS code.</p>

<p>In JSX, just like in HTML/XML an element’s type is identified with a tag and the attributes of the tag represent the properties.</p>

<p>JSX is not a requirement though it is highly preferable because of its readability and UI benefits.</p>

<p>Which method does the usage of JSX replace?</p>

Select Correct answer

ReactDOM Package 

<p>Working with React in the browser requires the inclusion of two libraries, one of which is <strong>ReactDOM. </strong>React creates views, ReactDOM renders the browser UI.</p>

<p>ReactDOM and React were split up for version 0.14 into separate packages.</p>

<p>The ReactDOM packages offer DOM-oriented methods used for better management of DOM elements on a web page.</p>

<p>The methods include but are not limited to:</p>

<p><strong>‣render()</strong></p><p><strong>‣hydrate()</strong></p><p><strong>‣findDOMNode()</strong></p><p><strong>‣createPortal()</strong></p>

<p>Before getting into the methods, it’s important to note that using ReactDOM entails importing it from the react-dom package. To do so, follow the syntax below:</p>

<p>ReactDOM renders the UI of the browser.</p>

render() Function

<p>The <strong>render()</strong> method represents the defined HTML code inside a specified HTML element. The syntax of the function is as follows:</p>

<p>The method takes on two arguments, HTML code, and element.</p>

<p>The rendering will take place in a folder located inside the root directory, for preface we’ll name it “<strong><samp>public</samp></strong>”. In the said folder, you can find an <strong><samp>index.html</samp></strong> file.</p>

<p>The file body takes on a single <strong><samp>&lt;div&gt;</samp></strong>, and the rendering will take place there.</p><p>Find an example displaying the above-written text below:</p>

<p>The id of the element is “<strong><samp>root</samp></strong>”, as that is the standard protocol, but it doesn’t have to be.</p>

<p>As mentioned, the result can be found in <samp><strong>&lt;div id=&quot;root&quot;&gt;</strong></samp>.</p>

<p><strong><samp>root </samp></strong>is an HTML element where developers can find the result. For the informal definition- it acts as a <em>container</em><strong> </strong>for managing content.</p>

<p>It can be named anything, for example, ‘<samp><strong>wild</strong></samp>’.</p>

<p>Where will the rendering of the HTML code inside a defined HTML element take place?</p>

 findDOMNode() Function

<p>The said method is utilized for getting the DOM node wherever a particular React component was rendered in the past.</p>

<p>The syntax of the function reads as follows:</p>

<p>The method, as presumed, takes on a single parameter that presumes a React Component to be searched in the DOM browser.</p>

<p>The result can either be successful or null. Success indicates the location of the rendered component.</p>

<p>We’ll refer to components in future lessons.</p>

<p>For server-side rendering, we go with the <strong><samp>hydrate()</samp></strong> method instead of the<strong><samp> render() </samp></strong>method. In fact, that is essentially, the only difference between <strong><samp>hydrate()</samp> </strong>and <strong><samp>render()</samp></strong>.</p>

<p>The parameters of the function may include a JSX expression for future rendering and a container for rendering purposes as well. Callbacks are optional and rarely used, however, they entail the execution of a method once rendering is finalized.</p>

<p>How many parameters does the <strong><samp>hydrate() </samp></strong>method take on (essentials)?</p>

<h2>What does this section cover?</h2><p>This section scratches the surface of React. With a thorough introduction of its purpose and an overview of all the core concepts, you’ll be taking a peak at the famous User Interface builder and getting to know all its angles. First impressions matter and these lessons warm developers up to the world of React.</p>

Get Started

<h2>What does this section cover?</h2><p>It’s time to get your hands dirty with React, following the introduction, this section serves as a guideline for your first steps. </p><p>We’ll be kicking it off by installing React and finishing off with your first-ever application. A strong start brings forward a productive journey.</p><p> Even though installing an application seems like a no-brainer, this section will prove you wrong. React offers a world of perks, accessing them however takes a little work.</p>

Setup

<h2>What does this section cover?</h2><p>DOM and JSX are the focus of this section. After the overview of DOM and JSX, we&#x27;ll be exploring and defining terms such as Virtual DOM, 2its features, and its contrast to the DOM. </p><p>We&#x27;ll finish off the section with a tutorial on how to think in React, by covering all the steps developers will go over to implement structure in their React applications.</p>

ReactDom & JSX

<h2>What does this section cover?</h2><p>We’ll be expanding on React fundamentals, specifically, the concept of components.  </p><p>By introducing your first-ever components that are used in every standard component to important concepts like nesting, conditional rendering, lists, and so on.</p><p>The rather compact section gives developers not only hands-on skills they’ll encounter throughout their frontend journey but a look under the hood.</p>

Components

<h2>What does this section cover?</h2><p>React specializes in developing the User Interface of applications, meaning the development of UI should be efficient by default.</p><p>We&#x27;ll be expanding on all the different ways to style React, as there is no specific one-way approach when it comes to styling. React Styling includes multiple methods for every situation to provide the utmost efficient approach to both users and developers.</p>

Styling

<h2>What does this section cover?</h2><p>Component states go through many changes in every application. This section works towards better understanding those changes and defining them. </p><p>State changes can be found in their lifecycle, which developers are bound to monitor in order to make modifications themselves. </p><p>States are also widely used, hence the creation of Hooks, to make that process more accessible to developers. </p><p>Lastly, states can get tricky to work with and may introduce side effects, but React has a solution for that too!  </p>