How to add a background image to a web page: 1. Use the background-image attribute to introduce the image path; 2. Use background-repeat to control duplication; 3. Use background-size to set the image size; 4. Use background-position to adjust the display position; 5. Use background-attachment to fix the background image; 6. Add colors or gradients to improve readability. The specific operation is to first use background-image to specify the image path, then set no-repeat to avoid duplication, cover the adaptive screen, center display, fix the background image, and finally use linear-gradient or radial-gradient to add a translucent layer to ensure clear text.
Want to add a background image to the webpage? It's actually very simple. CSS provides special attributes to handle this. The core is to use background-image attribute, combined with some commonly used settings, so that the background image can be both beautiful and not affect the content reading.
Basic writing method: use background-image to introduce pictures
The most direct way is to use background-image property, followed by url() , and place the image path inside. for example:
body {
background-image: url('background.jpg');
}This will change the page background to the picture you specified. However, this is not enough. It is best to adjust the display effect in conjunction with other settings, otherwise the picture may be too colorful and the text cannot be seen clearly.
Common settings for background images: control display mode
After adding the background image, some optimizations are usually needed to make it more in line with the page style. The commonly used properties are the following:
-
background-repeat: Controls whether to repeat, the default is tiled, and can be changedno-repeatto avoid duplication. -
background-size: Set the image size, commonly usedcoveror specific size (such as100% 100%). -
background-position: Controls the starting display position of the image, such ascentercenter. -
background-attachment: Whether to fix the background image, such asfixed, so that the image scrolls with the page without moving.
For example:
body {
background-image: url('background.jpg');
background-repeat: no-repeat;
background-size: cover;
background-position: center;
background-attachment: fixed;
}After setting this way, the background image will adapt to the screen size and display it in the center, without duplication. Moreover, the background image will remain fixed when scrolling the page, making the visual effect better.
Color overlay or gradient background: Improve readability
Sometimes the background image is too bright or too complicated, which will affect the reading of the text. At this time, you can add a layer of color transparency to the background image, or use gradients to "cover" some pictures to make the text clearer.
You can set translucent colors with background-color , or directly use linear-gradient or radial-gradient .
For example:
div {
background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('background.jpg');
background-size: cover;
}This code will add a black translucent linear gradient to the picture, making the white text easier to see clearly.
Basically all that is it, adding a background image is not difficult, but to make the page look comfortable, you need to cooperate with some additional settings. Remember several common attributes and use them flexibly to create a good background effect.
The above is the detailed content of How to add a background image in CSS. For more information, please follow other related articles on the PHP Chinese website!
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