CSS - Complete working code of using CSS into HTML

Complete Working Code of using CSS into HTML

HTML File (index.html)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Styling Methods in CSS</title>
    <!-- Internal CSS -->
    <style>
        body {
            font-family: Arial, sans-serif;
        }
        .internal-style {
            color: green;
            background-color: lightgray;
            padding: 10px;
            border-radius: 5px;
        }
    </style>
    <!-- External CSS -->
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <h1>Styling Methods in CSS</h1>
    <!-- Inline CSS -->
    <p style="color: red; font-size: 20px;">This paragraph is styled with inline CSS.</p>
    <!-- Internal CSS -->
    <p class="internal-style">This paragraph is styled with internal CSS.</p>
    <!-- External CSS -->
    <p id="external-style">This paragraph is styled with external CSS.</p>
</body>
</html>

CSS File (styles.css)

#external-style {
    color: blue;
    font-weight: bold;
    text-decoration: underline;
}

Explanation of the Code

HTML File (index.html)
Header section

  • The webpage title is set using the <title> tag.
  • Between <style> tags is where internal CSS is contained. It applies class styling to any paragraph and the <body> tag.internal fashion.
  • The <link> tag is used to connect external CSS, pointing to styles.css, which contains the styles declared for the #external-style ID.

Body section

  • Contains a <h1> header to introduce the topic.
  • Inline CSS: The style property is used to style a paragraph inside of a tag. Here's an example of an inline style.
  • Internal CSS: Styles specified in the head section are applied by another paragraph with the class internal-style.
  • External CSS: Styles set in the external CSS file are applied using the ID external-style in the third paragraph.

CSS File (styles.css)

includes CSS rules that style a particular paragraph with color, text decoration, and font weight for the #external-style ID. Especially in bigger projects where several web pages share the same styles, this external stylesheet shows how styles can be controlled independently from HTML, improving reusability and maintainability.

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CSS

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Complete Working Code of using CSS into HTML

HTML File (index.html)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Styling Methods in CSS</title>
    <!-- Internal CSS -->
    <style>
        body {
            font-family: Arial, sans-serif;
        }
        .internal-style {
            color: green;
            background-color: lightgray;
            padding: 10px;
            border-radius: 5px;
        }
    </style>
    <!-- External CSS -->
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <h1>Styling Methods in CSS</h1>
    <!-- Inline CSS -->
    <p style="color: red; font-size: 20px;">This paragraph is styled with inline CSS.</p>
    <!-- Internal CSS -->
    <p class="internal-style">This paragraph is styled with internal CSS.</p>
    <!-- External CSS -->
    <p id="external-style">This paragraph is styled with external CSS.</p>
</body>
</html>

CSS File (styles.css)

#external-style {
    color: blue;
    font-weight: bold;
    text-decoration: underline;
}

Explanation of the Code

HTML File (index.html)
Header section

  • The webpage title is set using the <title> tag.
  • Between <style> tags is where internal CSS is contained. It applies class styling to any paragraph and the <body> tag.internal fashion.
  • The <link> tag is used to connect external CSS, pointing to styles.css, which contains the styles declared for the #external-style ID.

Body section

  • Contains a <h1> header to introduce the topic.
  • Inline CSS: The style property is used to style a paragraph inside of a tag. Here's an example of an inline style.
  • Internal CSS: Styles specified in the head section are applied by another paragraph with the class internal-style.
  • External CSS: Styles set in the external CSS file are applied using the ID external-style in the third paragraph.

CSS File (styles.css)

includes CSS rules that style a particular paragraph with color, text decoration, and font weight for the #external-style ID. Especially in bigger projects where several web pages share the same styles, this external stylesheet shows how styles can be controlled independently from HTML, improving reusability and maintainability.

Related Tutorials

Frequently Asked Questions for CSS

Content, padding, border, and margin make up the box model.

Relative moves from original position; absolute positions relative to nearest positioned ancestor.

id is unique; class can be reused.

visibility hides but keeps space; display removes element from layout.

Minify files, reduce specificity, and remove unused styles.

Overrides all other declarations, regardless of specificity.

Use margin: auto or flexbox/grid techniques.

Allow responsive design by applying styles based on screen size or device.

Define relationships between selectors: descendant ( ), child (>), adjacent (+), sibling (~).

Tools like SASS or LESS add features like variables and nesting to CSS.

Targets part of an element, like ::before or ::after.

Use @import "filename.css"; at the top of the file.

Controls stacking order of overlapping elements.

Forces a property to inherit value from parent.

Static — not affected by top, bottom, left, or right.

Use universal selector * or define styles in body/root.

em is relative to parent; rem is relative to root element.

Inline, internal (embedded), and external CSS.

A layout model for arranging elements in rows or columns with flexible sizing.

Targets elements in a specific state, like :hover or :nth-child().

Use fluid layouts, media queries, and relative units.

CSS styles HTML elements to control layout, color, fonts, and responsiveness.

Reusable custom property values, declared with --var-name.

Determines which rule applies when multiple rules target the same element.

Performs calculations to dynamically set CSS property values.

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