Detailed explanation of the use of background-position property in CSS

Detailed introduction to the usage of background-position in CSS

In CSS, the background-position property is used to set the position of the background image within the element. This property is very useful because it allows us to precisely control where the background image appears. The following will introduce the usage of background-position in detail and provide some specific code examples.

Syntax:
The syntax of the background-position attribute is as follows:
background-position: x-axis y-axis;

x-axis and y-axis can use the following units To specify the position:

• px: pixels
• %: percentage (relative to the width and height of the container)

If only one value is set, then The second value will default to center. You can also use keywords to set the position, such as: top, bottom, left, right, center.

Example 1:
The following is a basic code example that shows how to use background-position to position the background image in the upper left corner of the element.

div {
  background-image: url("image.jpg");
  background-position: left top;
}

Example 2:
The following is an example that shows how to use percentages to position a background image. In this example, the background image will be positioned at the right and bottom 50% of the element.

div {
  background-image: url("image.jpg");
  background-position: 100% 100%;
}

Example 3:
The following is an example that shows how to use pixels to position a background image. In this example, the background image will be positioned 30 pixels from the element.

div {
  background-image: url("image.jpg");
  background-position: 30px;
}

Multiple background positioning:
In CSS3, you can also specify multiple background images and set different positions for them. Below is an example that shows how to set different positions for two background images.

div {
  background-image: url("image1.jpg"), url("image2.jpg");
  background-position: left top, right bottom;
}

Summary:
The background-position property in CSS allows us to precisely control the position of the background image. In addition to using pixels and percentages to position background images, you can also use keywords to set the position. In CSS3, you can also set different positions for multiple background images. By carefully adjusting the value of background-position, a variety of background image effects can be achieved.

I hope this article will help everyone understand and use the background-position attribute.

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