HTML `<div>` Element:

What is the `<div>` Element?

✔ The <div> (short for division) is a block-level container used to group elements together for styling and layout purposes.
✔ It does not add any visual changes by itself but helps in organizing content and applying CSS styles.
✔ It is often used in web layouts, UI designs, and JavaScript-based dynamic content manipulation.

1️⃣ Basic Syntax of `<div>`

<div>
    This is a container.
</div>

✔ The <div> acts as a wrapper around content.
✔ By default, it takes up the full width of the page.

2️⃣ Why Use `<div>`?

Purpose	Example
Grouping Content	Wraps related content together
Styling Sections	Applies CSS styles to grouped elements
Creating Layouts	Helps structure a webpage using CSS
JavaScript Manipulation	Used for dynamic updates and interactivity

3️⃣ Example: Grouping Content with `<div>`

<div>
    <h2>About Us</h2>
    <p>We provide high-quality web development services.</p>
</div>

✔ The heading (<h2>) and paragraph (<p>) are grouped inside a <div>.
✔ This allows styling them together as a single unit.

4️⃣ Styling a `<div>` with CSS

You can use CSS to customize the appearance of a <div>.

<div style="background-color: lightblue; padding: 15px; border-radius: 8px;">
    This is a styled div.
</div>

✔ Background color (lightblue)
✔ Padding (15px) to add spacing
✔ Rounded corners (border-radius: 8px)

5️⃣ Example: Creating Webpage Layouts with `<div>`

The <div> element is widely used to create webpage structures.

<div style="width: 100%; background-color: gray; padding: 10px; text-align: center;">
    <h2>Website Header</h2>
</div>

<div style="display: flex;">
    <div style="width: 30%; background-color: lightgray; padding: 10px;">
        Sidebar
    </div>
    
    <div style="width: 70%; background-color: white; padding: 10px;">
        Main Content Area
    </div>
</div>

<div style="width: 100%; background-color: gray; padding: 10px; text-align: center;">
    <p>Footer Section</p>
</div>

✔ Header (<div>) at the top.
✔ Sidebar (<div>) on the left, Main Content (<div>) on the right.
✔ Footer (<div>) at the bottom.

6️⃣ Nesting `<div>` Elements

You can place <div> inside another <div> for complex layouts.

<div style="border: 2px solid black; padding: 15px;">
    <h2>Outer Div</h2>
    
    <div style="background-color: yellow; padding: 10px;">
        Inner Div
    </div>
</div>

✔ The inner <div> is placed inside the outer <div> for structured design.

Changing `<div>` Behavior with CSS:

You can modify how <div> behaves using CSS properties.

✔ Convert <div> to Inline Block:

div {
    display: inline-block;
    width: auto;
}

✔ Make <div> Hidden Until Needed:

div {
    display: none;
}

✔ Center a <div> Horizontally:

div {
    width: 50%;
    margin: auto;
}

Best Practices for Using `<div>:`

✅ Use <div> only when necessary (avoid "div soup").
✅ Use semantic elements (<header>, <section>, <footer>) instead of <div>.
✅ Always add CSS for styling and layout adjustments.
✅ Use nested <div> properly for structured layouts.
✅ Optimize <div> usage for better performance and readability.

HTML

HTML <div> Element:

What is the <div> Element?

1️⃣ Basic Syntax of <div>

2️⃣ Why Use <div>?

3️⃣ Example: Grouping Content with <div>

4️⃣ Styling a <div> with CSS

5️⃣ Example: Creating Webpage Layouts with <div>

6️⃣ Nesting <div> Elements

Changing <div> Behavior with CSS:

Best Practices for Using <div>: