React JS - React Basics - 1 - What you need to Know before you learn React?

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HTML Overview:

HTML serves as the foundation for constructing web pages, defining their structure through a collection of elements. These elements, complete with their opening and closing tags, are employed by developers to "annotate" an HTML document. These elements collectively compose a web page's framework and dictate the content displayed within a web browser.

Mastery of HTML entails understanding:

  1. The role of HTML in the web browsing experience,
  2. Proficient utilization of HTML tags and proper syntax,
  3. Application of HTML elements within a web document.

An additional critical concept within the realm of HTML is the Document Object Model, or DOM.

Interaction with elements on a web page is essential. Consequently, an HTML document must be represented in a manner that enables JavaScript code to query and modify it. The DOM fulfills this purpose by providing a model of the entities present within your HTML file.

Web developers employ JavaScript to interact with the DOM, thereby updating content, establishing events, and animating HTML elements.

Before embarking on learning React, it is advisable to achieve comfort with the subsequent HTML tags and principles:

Layout & Style

• <html>

• <head>

• <body>

• <div>

Text Formatting & Lists

• <h1>…<h6>

• <p>

• <ul><li>

• <b><i>

Images and Links

• <img src="">

• <a href="">

Linking and Meta

• <link>

• <title>

• <meta>

Semantic

• <header>

CSS Insight:

CSS (Cascading Style Sheets) is the code employed to stylize HTML. An understanding of fundamental CSS concepts is vital prior to delving into React. This foundation proves beneficial when styling React components, enhancing the learning expedition.

Prior to initiating React education, ensure proficiency in these CSS styling aspects:

• Font styling (including font size and color),

• Flex Box Layout (arranging items via CSS Flex Box Layout),

• CSS Selectors,

• Positioning, Padding, Margins, and Display,

• Colors, Backgrounds, and Icons.

JavaScript Fundamentals and ES6:

React is fundamentally constructed using JavaScript, particularly the modern iteration known as ES6. Familiarity with JavaScript basics is imperative during React acquisition.

JavaScript operates as the scripting language, with React functioning as a JavaScript UI library. Consequently, the preliminary step involves mastering JavaScript.

Below are key JavaScript topics necessitating comfort prior to embarking on the React learning journey:

Data Types: Knowing how different data types work allows you to manipulate and utilize data effectively in both plain JavaScript and React.

Variables (var, let, const): Understanding variable scope and behavior helps prevent common issues when working with React's component-based structure.

Conditional Statements and Loops: These are fundamental for controlling program flow, which is essential when building dynamic user interfaces with React.

Objects, Arrays, and Functions: React heavily utilizes objects and arrays to manage state and components, and functions are essential for creating reusable code.

ES6 Arrow Functions: These concise functions are commonly used in React components for event handlers and other functions.

Built-in Functions (map(), forEach(), promises, etc.): These functions are frequently employed in React for rendering lists, managing asynchronous operations, and more.

Destructuring: React often involves destructuring objects and arrays for efficient data extraction.

Error Handling: Detecting and handling errors is crucial to maintaining a stable React application.

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