How to use div in html

In HTML, div is a container that is used to organize a group of related elements together and to define and control related styles on these elements. This article will introduce the use of div through the following aspects.

1. Basic syntax

The basic structure of the div tag is as follows:

<div>这里是容器内的内容</div>

Among them, represents the closing tag of the container, and "here is the content inside the container" is the content placed inside the container. It should be noted that the divs must be nested correctly, that is, the opened div must be closed at the corresponding position.

2. Set the style of div

You can set the style of div through CSS, for example:

div {
    width: 500px;
    height: 300px;
    background-color: #ccc;
    border: 1px solid #000;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
}

The above code sets the width and height of div respectively. It is 500px and 300px, the background color is #ccc, the border is 1px solid black, the text alignment is center aligned, and the font size is 16px and the weight is bold.

3. Nested div

You can nest a div within another div to achieve a more complex layout. For example:

<div>
    <div>这是内部容器1</div>
    <div>这是内部容器2</div>
</div>

In the above code, the two elements "inner container 1" and "inner container 2" are both included in the "outer container", where the "outer container" is defined with class outer div elements, while "inner container 1" and "inner container 2" use div elements with classes inner1 and inner2.

4. Application of div

div can be used in many situations, such as:

(1) Web page layout: Web content can be divided into several parts, use divs to organize them together to achieve the overall layout effect.

(2) CSS layout: Using div and CSS, you can easily create various layout effects, such as grid layout, horizontal layout, vertical centering, etc.

(3) JavaScript operation: You can use JavaScript to operate divs, such as changing the content, position, style, etc. of divs through JavaScript.

In short, div is one of the indispensable tags in web development and is the key to realizing web page layout and style control. I hope that after readers master the basic syntax, application situations and common setting methods of div, they can skillfully use it to develop richer, more beautiful and more functional web pages.

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