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How to connect css

王林

Release： 2023-05-21 10:47:36

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In web design, CSS (Cascading Style Sheets) is widely used. CSS can add features such as style, formatting, and layout to web pages, making them more beautiful and easier to read. Therefore, knowing how to connect CSS files is an important step in learning web design. Next, this article will detail how to connect CSS.

1. Inline CSS

Inline CSS is a method of embedding CSS code directly into HTML files. To use inline CSS, you need to add a style tag to the HTML head tag and write CSS code in it. Here is an example:

<!DOCTYPE html>
<html>
<head>
<style>
h1 {
  color: blue;
}
p {
  color: red;
  font-size: 20px;
}
</style>
</head>
<body>

<h1>This is a heading</h1>
<p>This is a paragraph.</p>

</body>
</html>

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In this example, we used the <style> tag to embed CSS code into the HTML file. The CSS code defines the styles of the h1 and p tags, making the text of the h1 tag blue and the text of the p tag red, and increasing the font size.

Although inline CSS is very convenient, it is rarely used in practice. This is because inline CSS can make HTML files cluttered and difficult to maintain. As your website grows in size, using external CSS files is a better approach.

2. External CSS files

External CSS files are a method of storing CSS code in a separate file and then referencing the file in the HTML file.

First, you need to create a CSS file and store all your CSS code in that file. When naming your file, use .css as the file extension. When creating CSS files, you should make sure that the code you write is well structured. Here is an example:

/* styles.css */
h1 {
  color: blue;
}
p {
  color: red;
  font-size: 20px;
}

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Next, link the CSS file to the HTML file within the HTML file. Add a link tag inside the head tag, the rel attribute of the tag should be stylesheet, and the href attribute should point to your CSS file. Here is an example:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" href="styles.css">
</head>
<body>

<h1>This is a heading</h1>
<p>This is a paragraph.</p>

</body>
</html>

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In this example, we use the link tag to associate the HTML file with the CSS file. In the head tag, we added a link tag and set the rel attribute to "stylesheet" and the href attribute to the file path of our CSS file. This will apply the CSS style to all relevant elements in the HTML file.

3. Inline CSS

Inline CSS is a method of applying CSS code directly to HTML elements. To use inline CSS, you need to write the CSS code into the style attribute of the HTML element. Here is an example:

<!DOCTYPE html>
<html>
<head>
</head>
<body>

<h1 style="color:blue;">This is a heading</h1>
<p style="color:red;font-size:20px;">This is a paragraph.</p>

</body>
</html>

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In this example, we use the style attribute to apply inline CSS directly to the h1 and p elements. Like inline CSS, inline CSS is less commonly used, but it can be used to quickly add styles.

4. Use @import

@import is another way to connect CSS files. It works by importing one CSS file into another CSS file. Here is an example:

/* styles.css */
@import url("small-styles.css") screen and (max-width: 600px);

h1 {
  color: blue;
}
p {
  color: red;
}

/* small-styles.css */
p {
  font-size: 20px;
}

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In this example, we create a main CSS file and a smaller CSS file and import them using @import.

When browsers load CSS files, they load the main file first and then the smaller files. Small files only apply styles to browsers with screens less than 600 pixels wide.

The advantage of using @import is that it can help organize code and reduce file size. However, in practice, modern browsers can handle CSS files containing many files, so @import is not necessary.

Conclusion

Connecting CSS is a critical step in creating a beautiful website. In inline CSS, embedding CSS code directly into the HTML file can make the style simpler and clearer. Using external CSS files can make HTML files easier to maintain and separate portions of style code from the HTML document. While inline CSS and @import methods are rarely used, but can still be useful in some situations.

Either way, learning how to connect CSS is the foundation of web design. Hopefully this article helped you better understand the various ways to connect CSS.

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