Differentiate between inline, internal, and external CSS.

Megon · Apr 29, 2024, 02:43 PM

Lerok · May 09, 2024, 12:55 PM

Inline CSS, internal CSS, and external CSS are three different methods used to apply Cascading Style Sheets (CSS) to HTML documents. Here's how they differ:

1. **Inline CSS**:
- Inline CSS involves styling HTML elements directly within the HTML document using the `style` attribute.
- CSS rules are applied directly to individual HTML elements, affecting only those specific elements.
- Inline CSS is typically used for styling individual elements with unique styles or for overriding styles applied by external or internal CSS.
- Example:
```html
<p style="color: blue; font-size: 16px;">This is a paragraph with inline CSS.</p>
```

2. **Internal CSS**:
- Internal CSS involves defining CSS rules within the `<style>` element in the `<head>` section of an HTML document.
- CSS rules specified within the `<style>` element apply to the entire HTML document or to specific sections defined by HTML elements.
- Internal CSS is useful for applying styles consistently across multiple elements within a single HTML document.
- Example:
```html
<!DOCTYPE html>
<html>
<head>
<style>
p {
color: red;
font-size: 18px;
}
</style>
</head>
<body>
<p>This is a paragraph with internal CSS.</p>
</body>
</html>
```

3. **External CSS**:
- External CSS involves defining CSS rules in a separate CSS file and linking it to an HTML document using the `<link>` element.
- CSS rules specified in the external CSS file apply to the HTML document or multiple HTML documents linked to it.
- External CSS promotes separation of concerns, allowing for easier management and maintenance of styles across multiple HTML documents.
- Example (external.css):
```css
/* external.css */
p {
color: green;
font-size: 20px;
}
```
- Example (HTML document):
```html
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="external.css">
</head>
<body>
<p>This is a paragraph with external CSS.</p>
</body>
</html>
```

In summary, inline CSS applies styles directly to individual HTML elements using the `style` attribute, internal CSS defines styles within the `<style>` element in the `<head>` section of an HTML document, and external CSS defines styles in a separate CSS file linked to an HTML document using the `<link>` element. Each method offers different advantages and is suited to different scenarios based on the requirements of the project.

Differentiate between inline, internal, and external CSS.

Megon

Lerok

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