IT, Programming, & Web Development › Forums › Web Development › HarvardX: CS50W – CS50’s Web Programming with Python and JavaScript › CS50W – Lecture 0 – HTML and CSS › How to link an HTML file with CSS
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June 26, 2024 at 9:16 am #2773
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Connecting an HTML file with CSS involves linking your HTML document to a separate CSS file so that styles defined in the CSS file can be applied to the HTML elements. Here’s how you can do it:
Method 1: External CSS File
- Create a CSS File:
Create a new file with a.css
extension (e.g.,styles.css
). This file will contain all your CSS rules. -
Write CSS Styles:
Inside your CSS file (styles.css
), write your CSS rules. For example:/* styles.css */ body { font-family: Arial, sans-serif; background-color: #f0f0f0; } h1 { color: #333; } /* Add more styles as needed */
- Link CSS to HTML:
In your HTML file, within the<head>
section, add a<link>
tag to link to your CSS file. The<link>
tag should be placed between the opening and closing<head>
tags. For example:<!-- index.html --> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <link rel="stylesheet" href="styles.css"> </head> <body> <!-- Your HTML content here --> <h1>Hello, world!</h1> <p>This is a paragraph.</p> </body> </html>
Here,
href="styles.css"
specifies the path to your CSS file relative to your HTML file. Adjust the path if your CSS file is in a different directory.
Method 2: Internal CSS
Alternatively, you can include CSS directly within the
<style>
tags in the<head>
section of your HTML file. This is useful for smaller styles that are specific to that HTML file and don’t need to be reused elsewhere.- Write CSS Styles Inline:
Inside the<style>
tags in your HTML file, write your CSS rules directly. For example:
html
<!-- index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body {
font-family: Arial, sans-serif;
background-color: #f0f0f0;
}
h1 {
color: #333;
}
/* Add more styles as needed */
</style>
</head>
<body>
<!-- Your HTML content here -->
<h1>Hello, world!</h1>
<p>This is a paragraph.</p>
</body>
</html>
Summary
- External CSS: Use a separate
.css
file and link it to your HTML using<link rel="stylesheet" href="styles.css">
. - Internal CSS: Use the
<style>
tag within the<head>
section of your HTML file to define CSS rules directly.
Using external CSS files is generally preferred for larger projects or when you want to separate your HTML structure from its presentation (CSS). Internal CSS is useful for smaller styles or when you want styles to be specific to a single HTML file.
- Create a CSS File:
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