The key points of using CSS to implement gradient background include: 1. Select the linear-gradient or radial-gradient function; 2. Set the direction, color and position, such as background: linear-gradient(to bottom, #ffffff, #e0e0e0) or background: radial-gradient(circle, #ffffff, #cccccc); 3. It is recommended to use gradients as background-image, and cooperate with background-repeat and background-size attributes; 4. Add the -webkit- prefix when browser compatibility is considered; 5. Multiple gradients can be superimposed by commas, and when color transitions are unnatural, intermediate color points can be adjusted. After mastering these key points, you can flexibly achieve various gradient effects.

It is actually not difficult to implement gradient backgrounds with CSS, but there are several key points that need attention. The most common practice is to use linear-gradient or radial-gradient functions to define the background image.

linear-gradient is the most commonly used gradient method

A linear gradient is a gradient from one direction to another, such as from top to bottom, from left to right, or any angle. The basic writing method is:

 background: linear-gradient(to bottom, #ffffff, #e0e0e0);

The direction here can be a keyword (such as to right , to bottom right ) or an angle value (such as 45deg ). The color part can be written with multiple color points, or you can add percentage control positions:

 background: linear-gradient(to right, red 20%, yellow 50%, green 80%);

This writing method is suitable for making buttons, cards and other designs that require visual hierarchy.

radial-gradient is more suitable for round or radiation effects

If you want a gradient with center diffusion, such as a circular button or halo effect, you can use a radial gradient:

 background: radial-gradient(circle, #ffffff, #cccccc);

You can also adjust the shape (circle or ellipse), size and position:

 background: radial-gradient(ellipse at top left, white, black);

This example will allow the gradient to start from the upper left corner and the ellipse to spread.

Gradients are more flexible to use as background-image

Although it can be written directly in background abbreviation attribute, it is recommended to treat gradients as image processing:

 background-image: linear-gradient(to bottom, #fff, #eee);
background-repeat: no-repeat;
background-size: cover;

This makes it easier to cooperate with other background attributes, such as adding image overlays or setting sizes.

• If you want to be compatible with old browsers, remember to add -webkit- prefix
• Multiple gradients can be superimposed by commas separated
• When the color transition is unnatural, you can add an intermediate color point to adjust it.

Basically that's it. By mastering the direction, color and function types, you can create various gradient backgrounds.

The above is the detailed content of Implementing gradients as backgrounds in css. For more information, please follow other related articles on the PHP Chinese website!