How to use CSS to achieve border shadow effects on elements

The method of using CSS to achieve the border shadow effect of elements requires specific code examples

In recent years, web design has paid more and more attention to user experience, and the goal is to provide as much A more realistic and layered page effect. Element shadow effect is one of them, it can add a three-dimensional feeling to the page, making the elements more prominent and attractive. This article will introduce how to use CSS to achieve the border shadow effect of elements and provide specific code examples.

To achieve the border shadow effect of an element, you can use the box-shadow property of CSS. This property is used to add a shadow effect to the border of an element. The syntax is as follows:

box-shadow: h-offset v-offset blur spread color inset;

where h-offset and v-offset represent the horizontal and vertical offsets of the shadow respectively. Quantity, which can be positive or negative. blur represents the blur radius of the shadow. The larger the value, the blurrier it is. spread represents the expansion radius of the shadow. The larger the value, the more spread the shadow. color represents the color of the shadow, and can use hexadecimal, RGB, RGBA, HSL, or HSLA color values. inset is used to set the shadow to the inner shadow effect. If this keyword is omitted, the default is the outer shadow effect.

The following is a specific example for implementing a box with a border shadow effect:

HTML code:

<div class="box">Hello, CSS Shadow!</div>

CSS code:

.box {
  width: 200px;
  height: 100px;
  background-color: #fff;
  border: 1px solid #000;
  border-radius: 5px;
  box-shadow: 2px 2px 5px 2px rgba(0, 0, 0, 0.3);
}

In the above example, we created a box with a width of 200px and a height of 100px. By setting the border attribute, we set a 1px solid border with a black border color. By using the box-shadow property, we add a 2px shadow effect to the border of the box, with the shadow color being translucent black.

You can adjust the values ​​of h-offset, v-offset, blur and spread according to specific needs, and set different color values ​​to achieve various border shadow effects. For example, if you want to achieve a lighter shadow effect, you can reduce the transparency of the color value, such as rgba(0, 0, 0, 0.1). If you want to achieve a wider, more diffuse shadow effect, you can increase the spread value.

To sum up, you can easily achieve the border shadow effect of elements by using the box-shadow property of CSS. By adjusting the attribute values, you can achieve different shadow styles, thereby enriching the design of the page. Hopefully the code examples provided in this article will help you achieve the border shadow effect you want.

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