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Learn to learn CSS from scratch and master the skills of making basic web page frameworks

王林

Release： 2024-01-16 10:26:09

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Learn to learn CSS from scratch and master the skills of making basic web page frameworks

Learn CSS from scratch and master the basic framework production skills of web pages

Foreword:

In today’s Internet era, web design and development is a very Important skills. Learning CSS (Cascading Style Sheets) is one of the keys to mastering web design. CSS can not only add style and layout to web pages, but also present unique and attractive page effects to users. In this article, I will introduce you to some basic CSS knowledge and some commonly used code examples to help you learn CSS from scratch and master the basic framework production skills of web pages.

1. Understand the basic knowledge of CSS

Before learning CSS, we first need to understand some basic knowledge. CSS is a markup language used to describe the style and layout of web pages, and it is closely related to HTML (Hypertext Markup Language). HTML is used to describe the structure and content of web pages, while CSS is used to control the display style of web pages. Through CSS, we can select elements on the web page and set their style properties, such as font, color, size, position, etc. The following are some commonly used CSS style properties:

Font properties:

font-family: Set the font of the text, you can choose the default font or a custom font;

font-size: Set the size of the text;

font-weight: Set the thickness of the text;

font-style: Set the style of the text, such as italics, etc.
Background attributes:

background-color: Set the background color of the element;

background-image: Set the background image of the element;

background-repeat: Set the repetition method of the background image;

background-size: Set the size of the background image.
Border attributes:

border: Set the style, width and color of the element border;

border-radius: Set the rounded degree of the element border .
Size and position attributes:

width: Set the width of the element;

height: Set the height of the element;

margin : Set the size of the outer margin of the element;

padding: Set the size of the inner margin of the element;

position: Set the positioning method of the element.

2. Create the basic framework of the web page

After learning the basic knowledge of CSS, we can start to create the basic framework of the web page. Here is a simple web page frame example:

<!DOCTYPE html>
<html>
<head>
    <title>我的第一个网页</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
            background-color: #f0f0f0;
        }

        #header {
            background-color: #333;
            color: #fff;
            padding: 20px;
        }

        #navbar {
            background-color: #666;
            color: #fff;
            padding: 10px;
        }

        #content {
            background-color: #fff;
            padding: 20px;
        }

        #footer {
            background-color: #333;
            color: #fff;
            padding: 20px;
        }
    </style>
</head>
<body>
    <div id="header">
        <h1>我的第一个网页</h1>
    </div>

    <div id="navbar">
        <ul>
            <li><a href="#">首页</a></li>
            <li><a href="#">关于我们</a></li>
            <li><a href="#">联系我们</a></li>
        </ul>
    </div>

    <div id="content">
        <h2>欢迎来到我的网页</h2>
        <p>这是一个示例网页，用于演示CSS的基本用法。</p>
    </div>

    <div id="footer">
        <p>版权所有 &copy; 2022 我的网页</p>
    </div>
</body>
</html>

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In this code example, we use the id selector (starting with #) to select various parts of the web page and set their style attributes. By setting different element IDs, we can style various parts of the web page differently. This example web page includes a header, navigation bar (navbar), content area (content) and footer (footer), and sets their background color, text color, inner and outer margins and other attributes. You can adjust the style according to your needs.

3. Advanced techniques

In addition to basic style settings, CSS also has many advanced techniques that can make your web pages richer and more diverse. The following are some commonly used advanced techniques:

Use box model and floating layout: This can be achieved by setting the box model properties of the element, such as width, height, inner and outer margins, etc., and using floating layout. More complex page layouts.
Use CSS animation: By using the @keyframes property of CSS, you can create various animation effects, such as gradient, rotation, scaling, etc.
Responsive design: By using the media query (@media) attribute of CSS, you can set different styles and layouts for web pages according to different devices and screen sizes, thereby achieving responsive design.
Use CSS preprocessors: CSS preprocessors (such as Sass, Less, etc.) can help you write CSS code more efficiently and provide some additional features, such as variables, nested rules, mixins, etc. .

Summary:

Through the introduction of this article, you can have a preliminary understanding of basic CSS knowledge and skills, and learn how to create a simple web page framework. Learning CSS requires constant practice and experimentation. Only through practice can you better master the various techniques and usage of CSS. I hope this article will be helpful to your learning, and I wish you make further progress on the road to learning CSS!

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