How to layout css

With the popularity of the Internet, Web front-end development has attracted more and more attention. As the foundation of Web front-end development, CSS layout is an important element in building the visual presentation of web pages. This article will introduce the basic concepts of CSS layout and common layout methods to help web front-end engineers better use CSS for layout.

1. Basic concepts of CSS layout

1. Box model

The box model means that every element in the Web page is a box. This box has four attributes: content, padding, border, and margin. These four attributes correspond to the four areas of the box model.

2. Fluid layout

Fluid layout means that during the web page layout process, as the window size changes, the web page elements will automatically adjust their size and position to adapt. Device screens of different sizes.

3. Elastic Layout

Elastic layout means that during the web page layout process, the size of web page elements can be automatically adjusted according to the size of the device screen, thereby adapting to screens of different sizes. , and the position of the elements can be adjusted at will.

4. Grid layout

Grid layout refers to dividing a web page into multiple grids and then placing web page elements in these grids to achieve beauty and size suitable effect.

2. Common CSS layout methods

1. Flow layout

Flow layout is mainly achieved through percentage layout and adaptive layout. Percent layout means setting the width of the parent element to 100%, and then the child elements adapt to the size of the parent element by setting the percentage. Adaptive layout refers to setting the size of an element as a percentage. When the size of the parent element changes, the child elements will also adapt their size accordingly.

2. Flexible layout

Flexible layout uses the flexbox layout model. This layout model arranges elements according to rows or columns and supports adding alignment and white space. Using the flexbox layout model can easily adapt to the screen width.

3. Grid layout

Grid layout can well solve the integration problem of visual hierarchy, structure and content of web pages. Grid layout can be implemented through native CSS Grid layout, Bootstrap framework, etc.

3. CSS layout skills

1. Use margin to center the element

Use the margin attribute to center the element in the parent element. You can set the direction of centering in the parent element and set the margin-left and margin-right properties of the child element to auto.

2. Use absolute positioning to position elements

Use absolute positioning to position an element relative to its parent element. You can control the positioning of the parent element by setting the position attribute of the child element to absolute and setting the top, right, bottom, and left attributes.

3. Use float for layout

Use float to float elements to the left or right side of the parent element. By setting the float attribute of the child element and using the clear attribute to specify the clearing method of the current element, the standard layout of the web page can be achieved.

4. Summary

CSS layout is an indispensable and important element in Web front-end development. Learning CSS layout skills can optimize the structure of the code and improve the performance and effect of the web page. When using CSS for web page layout, full consideration must be given to different device sizes and the effects achieved to meet the needs of users. I hope this article can be helpful to the CSS layout skills of Web front-end development engineers.

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