Tutoriel HTML, CSS and JavaScript for beginners

programming 9 months ago

HTML: The Foundation of Web Pages

What it is: HTML (HyperText Markup Language) is the backbone of every web page. It defines the structure and content of a page, such as headings, paragraphs, images, and links.
Key concepts:
- Elements: Building blocks of HTML, like <h1> for headings, <p> for paragraphs, <img> for images, and more.
- Tags: Used to define the start and end of elements (e.g., <h1>This is a heading</h1>).
- Attributes: Provide additional information about elements (e.g., src attribute for image source).
Basic structure of an HTML page:

HTML

<!DOCTYPE html>
<html>
<head>
  <title>Page Title</title>
</head>
<body>
  </body>
</html>

What it is: CSS (Cascading Style Sheets) controls the visual presentation of web pages, including colors, fonts, layouts, and more.
How it works: CSS rules are applied to HTML elements to style them.
Key concepts:
- Selectors: Target specific HTML elements to apply styles.
- Properties: Define the style characteristics you want to change (e.g., color, font-size, margin).
- Values: Set the desired values for properties (e.g., color: blue;).
Example CSS rule:

CSS

h1 {
  color: red;
  font-size: 40px;
}

What it is: JavaScript is a scripting language that brings interactivity and dynamic behavior to web pages.
What it does:
- Interacts with HTML elements to modify their content and appearance.
- Responds to user actions (like clicks, form submissions).
- Creates animations and visual effects.
Key concepts:
- Variables: Store data for later use.
- Functions: Reusable blocks of code that perform specific tasks.
- Events: Actions that trigger JavaScript code execution (e.g., clicks, page loads).
Example JavaScript code:

JavaScript

function greet() {
  alert("Hello, world!");
}

Working Together: The Dynamic Trio

Practice and Exploration:

Use online resources and tutorials to delve deeper into each language.
Experiment with code examples and create your own web pages.
Build interactive and visually appealing websites by mastering these core technologies!