What is the web box model

The web box model is an important concept in web design and layout. It describes that every element in a web page is treated as a rectangular box, which contains the element's content, padding, borders, and margins. Web page box models can be divided into two types: standard box model and IE box model. The standard box model is a specification established by the W3C, while the IE box model is a model unique to Microsoft's IE browser. Mastering the principles and applications of the web page box model is very important for realizing various complex web page layout and style effects.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

The web box model is an important concept in web design and layout. It describes that every element in a web page is treated as a rectangular box, which contains the element's content, padding, borders, and margins. Understanding the web box model is very important for correctly controlling and laying out web pages.

Web page box model can be divided into two types: standard box model and IE box model. The standard box model is a specification formulated by the W3C (World Wide Web Consortium), while the IE box model is a model unique to Microsoft's IE browser.

In the standard box model, the total width of an element's box (including content, padding, and borders) is equal to the set width value. For example, if an element's width is set to 200 pixels, then the element's content area will be 200 pixels wide. In addition, padding and borders take up some space but do not change the overall width of the element.

However, in the IE box model, the total width of an element's box (including content, padding, and borders) is equal to the set width value plus the width of the left and right padding and borders. This means that if an element's width is set to 200 pixels, and it has 10 pixels of left and right padding and borders, then the element's content area will be 180 pixels wide (200-2*10).

To better understand the web box model, it can be compared to a nested box. The innermost box is the content area, which contains the actual content of the element. Next is the padding, which is located between the content area and the border and is used to control the distance between the element content and the border. Beyond that is the border, which surrounds the content area and padding and adds visible bounds to the element. The outermost box is the margin, which is located between the border and adjacent elements and is used to control the distance between the element and other elements.

Understanding the web page box model is very important for controlling web page layout and style. By adjusting the attribute values ​​of the element's width, padding, and border, various layout effects can be achieved. At the same time, you can also use the characteristics of margins and padding to control the distance and spacing between elements. These skills and knowledge are basic abilities that web designers and developers need to master.

In short, the web box model is a basic concept in web design and layout, describing the box structure of each element in the web page. Mastering the principles and applications of the web page box model is very important for realizing various complex web page layout and style effects.

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