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Creating a live HTML, CSS and JS displayer

Susan Sarandon

Jan 16, 2025 pm 12:51 PM

Learn web development by building projects! Even without HTML, CSS, or JavaScript knowledge, this tutorial will guide you through creating a live code displayer, similar to CodePen but with a unique twist. Let's embark on this exciting journey!

HTML: The Website's Foundation

HTML (HyperText Markup Language) forms the structural backbone of a website. It defines the page's content (text, images, buttons) using tags—instructions for the browser.

HTML Structure: A Detailed Breakdown

(Skip this section if you're already familiar with HTML.)

: This declaration signals an HTML5 document to the browser.
: The root container for all page elements. lang="en" specifies the language as English.
: Contains metadata (information about the page, not visible content). Often used for SEO.
<meta charset="UTF-8">: Specifies the character set (UTF-8 supports most characters).
<meta name="viewport" content="width=device-width, initial-scale=1.0">: Ensures proper scaling on different devices.
<title>Sleek HTML/CSS/JS Displayer</title>: The title displayed in the browser tab.
<link href="style.css" rel="stylesheet">: Links an external CSS file for styling.
<link href="https://cdnjs.cloudflare.com/.../all.min.css" rel="stylesheet">: Links a Font Awesome CSS file for icons.
: Closes the head section.
: Contains the visible page content.
<div class="app-container">: A main container for the application's layout. <li>...(Further HTML elements defining the code editor, preview pane, etc. See the complete code below.)</li> <li> <code>: Closes the body section.
: Closes the HTML document.

CSS: Styling Your Creation

CSS (Cascading Style Sheets) styles and lays out web pages, controlling colors, fonts, spacing, and visual appearance. Think of it as the website's aesthetic layer.

CSS Code Explanation (Summary):

The CSS code (shown below) uses selectors (e.g., body, .app-header) to target specific HTML elements and applies properties (e.g., color, background-color) and values to style them. It includes styles for dark mode, responsive design, and various UI elements.

JavaScript: Adding Interactivity

JavaScript adds interactivity, making your website dynamic. It allows for user interaction, content updates without page reloads, and more.

JavaScript Code Explanation (Summary):

The JavaScript code (shown below) manipulates the DOM (Document Object Model), adds event listeners to handle user input (typing, clicks), updates the preview pane, manages line numbers, implements a debounce function for efficiency, and controls dark mode and fullscreen functionality.

Complete Code:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Sleek HTML/CSS/JS Displayer</title>
  <link href="style.css" rel="stylesheet">
  <link crossorigin="anonymous" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" integrity="sha512-9usAa10IRO0HhonpyAIVpjrylPvoDwiPUiKdWk5t3PyolY1cOd4DSE0Ga+ri4AuTroPR5aQvXU9xC6qOPnzFeg==" referrerpolicy="no-referrer" rel="stylesheet">
</head>
<body>
  <div class="app-container">
    <!-- ... (rest of the HTML structure, as described above) ... -->
  </div>
  <script src="script.js"></script> </body>
</html>

/* ... (CSS code as described above) ... */

/* ... (JavaScript code as described above) ... */

(Note: The complete HTML, CSS, and JavaScript code would be too extensive to include here. The provided snippets give a structural overview and key explanations. The full code would be available in the original source.)

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