How to use CSS to change the style of a DIV

DIV is a very important tag in HTML, which can be used to divide pages, set layout and style, etc. In CSS, we can use various styles to change the size, color, font and other attributes of DIV. In this article, we will detail how to use CSS to change the style of a DIV.

Change DIV size

To change the size of DIV, we can use the width and height attributes. The width attribute can set the width of the DIV to pixels, percentages or automatic. We can use the following code to set it:

div {
  width: 100px; // 设置DIV宽度为100像素
  width: 50%; // 设置DIV宽度为父元素宽度的50%
  width: auto; // 自动调整DIV宽度
}

The height attribute is used to set the height of the DIV. It can also be set to pixels, percentages or automatic. We can You can use the following code to set it:

div {
  height: 100px; // 设置DIV高度为100像素
  height: 50%; // 设置DIV高度为父元素高度的50%
  height: auto; // 自动调整DIV高度
}

Change DIV color

To change the color of DIV, we can use the background-color attribute. This property can set the background color of the DIV. We can use the following code to set it:

div {
  background-color: red; // 设置DIV背景颜色为红色
  background-color: #ff0000; // 使用十六进制值设定背景颜色
}

Change the DIV font

To change the font of the text inside the DIV, we can use the font-family property. This property can set the font of the text inside the DIV. We can use the following code to set it:

div {
  font-family: "Arial", sans-serif; // 设置DIV内部文字字体为Arial或者sans-serif
}

Change the DIV border

To change the border of the DIV, we can use the border attribute. This property can set the border style, border width and border color of DIV. We can use the following code to set it:

div {
  border: 1px solid #000; // 设置DIV边框粗细为1像素，样式为实线，颜色为黑色
}

The above are common style properties for changing DIV. Through the combination of these style properties, we can create Various different DIV styles. For example, the following code can create a DIV with a red background, a width of 100 pixels, a height of 50 pixels, and a thick solid border of 1 pixel:

div {
  width: 100px;
  height: 50px;
  background-color: red;
  border: 1px solid #000;
}

Change the position of the DIV

To change the position of the DIV For position, we can use the position attribute. This attribute can set the positioning method of the DIV object. We can use the following code to set it:

div {
  position: static; // 静态定位
  position: absolute; // 绝对定位
  position: relative; // 相对定位
  position: fixed; // 固定定位
}

Positioning using the position attribute requires combining the top, bottom, left and right attributes. For example:

div {
  position: absolute; // 以绝对位置进行定位
  top: 10px; // 距离顶部10像素
  left: 20px; // 距离左边20像素
}

The above is an introduction to the basic methods and common attributes of using CSS to change DIV styles. Through these introductions, I hope readers can better understand how to use CSS to change the style of DIV and create a more beautiful and practical page layout.

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