🔰 CSS Select and element's parent

For a long time, in CSS land, developers were longing for a feature that allowed to select the parent of a particular element.

In this example, we have two .parent elements but with different children. With the :has() pseudo selector, we can select the parent of a particular child. With this we can apply some styling only to that particular parent.

This opens up a lot of possibilities such as

✨ Style a list when a particular element is hovered
✨ Style a card depending on whether or not it has an image
✨ Style a header depending on whether or not it has an hyperlink

The possibilities are endless 🔥
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Today, let's start with the first topic in the Web Development Roadmap:

✅ How the Web Works 🌐📥

📌 1. What happens when you type a URL in your browser?
▶️ Example: You type www.google.com and hit Enter.

Here’s what happens:

1️⃣ Browser Sends a Request
Your browser sends a request to the server where the website is stored. This is called an HTTP request.

2️⃣ DNS Resolves the Address
DNS (Domain Name System) turns www.google.com into an IP address like 142.250.64.78, so it knows where to send the request.

3️⃣ Server Receives the Request
The server is a computer that stores the website’s files. It processes the request and sends back the HTML, CSS, and JS files.

4️⃣ Browser Displays the Page
Your browser reads those files and renders the website for you to see.

📌 2. Key Concepts You Should Know

🧠 Client
Your browser (like Chrome) is the client – it requests the website.

🧠 Server
The machine that holds the website and responds to your request.

🧠 HTTP
A protocol – like a language – that browsers and servers use to talk.
➡️ Example:
⦁ GET – asking for a webpage
⦁ POST – sending form data

🧠 HTML, CSS, JavaScript
⦁ HTML: Gives structure (e.g., headings, paragraphs)
⦁ CSS: Adds style (e.g., colors, layout)
⦁ JS: Adds interaction (e.g., clicks, animations)

📌 Example Flow:

You type: www.example.com
↓
DNS converts it to IP: 93.184.216.34
↓
Your browser sends an HTTP GET request
↓
Server responds with HTML, CSS, JS
↓
Browser renders the page for you!

💡 Every time you visit a website or build one, this process is happening behind the scenes. As a web developer, understanding it helps you debug issues and write better code!

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✅ Set Up Your Code Editor & Browser Dev Tools 🛠️🌐

Before building websites, you need a solid environment. Here's how to set up everything as a beginner:

🔹 1. Code Editor: VS Code (Visual Studio Code)
VS Code is the most beginner-friendly and powerful editor used by most web developers.

➤ Steps to Set Up:
1️⃣ Download & install from code.visualstudio.com
2️⃣ Open VS Code → Go to Extensions tab (left sidebar)
3️⃣ Install these must-have extensions:
⦁ Live Server – Auto-refresh browser when you save
⦁ Prettier – Format your code neatly
⦁ HTML CSS Support – Boosts suggestions & auto-complete
⦁ Auto Rename Tag – Edits both opening and closing tags
⦁ Path Intellisense – Autocomplete file paths

➤ Settings to Tweak (optional):
⦁ Font size, tab spacing
⦁ Theme: Dark+ (default) or install others like Dracula

🔹 2. Browser: Chrome or Firefox
Use a modern browser with strong developer tools — Google Chrome is highly recommended.

➤ How to Open DevTools:
Right-click on any webpage → Inspect
or press Ctrl+Shift+I (Windows) / Cmd+Opt+I (Mac)

➤ Key DevTools Tabs:
⦁ Elements – Inspect & edit HTML/CSS live
⦁ Console – View JavaScript logs & errors
⦁ Network – Monitor page load and API calls
⦁ Responsive View – Test your site on mobile/tablets
(Click the phone+tablet icon on the top-left)

💡 Pro Tip:
Use Live Server in VS Code + DevTools in Chrome side-by-side for real-time preview & debugging. This workflow saves hours!

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✅ Frontend Development Skills (HTML, CSS, JavaScript) 🌐💻

1️⃣ HTML (HyperText Markup Language)
Purpose: It gives structure to a webpage.
Think of it like the skeleton of your site.

Example:

<!DOCTYPE html>
<html>
  <head>
    <title>My First Page</title>
  </head>
  <body>
    <h1>Hello, World!</h1>
    <p>This is my first webpage.</p>
  </body>
</html>

💡 Tags like <h1> are for headings, <p> for paragraphs. Pro tip: Use semantic tags like <article> for better SEO and screen readers.

2️⃣ CSS (Cascading Style Sheets)
Purpose: Adds style to your HTML – colors, fonts, layout.
Think of it like makeup or clothes for your HTML skeleton.

Example:

<style>
  h1 {
    color: blue;
    text-align: center;
  }
  p {
    font-size: 18px;
    color: gray;
  }
</style>

💡 You can add CSS inside <style> tags, or link an external CSS file. In 2025, master Flexbox for layouts: display: flex; aligns items like magic!

3️⃣ JavaScript
Purpose: Makes your site interactive – clicks, animations, data changes.
Think of it like the brain of the site.

Example:

<script>
  function greet() {
    alert("Welcome to my site!");
  }
</script>

<button onclick="greet()">Click Me</button>

💡 When you click the button, it shows a popup. Level up with event listeners: button.addEventListener('click', greet); for cleaner code.

👶 Mini Project Example

<!DOCTYPE html>
<html>
  <head>
    <title>Simple Site</title>
    <style>
      body { font-family: Arial; text-align: center; }
      h1 { color: green; }
      button { padding: 10px 20px; }
    </style>
  </head>
  <body>
    <h1>My Simple Webpage</h1>
    <p>Click the button below:</p>
    <button onclick="alert('Hello Developer!')">Say Hi</button>
  </body>
</html>

✅ Summary:
⦁ HTML = structure
⦁ CSS = style
⦁ JavaScript = interactivity

Mastering these 3 is your first step to becoming a web developer!

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