CSS frosted glass property optimization tips: filter and backdrop-filter

CSS frosted glass attribute optimization skills: filter and background-filter

In modern web design, the frosted glass effect (Blur) is widely used in the background or background of some interface elements. on the image to provide a blurry, soft visual effect. In the past, the main way to achieve the frosted glass effect was to use image processing software to blur the image, and then use the blurred image as the background. However, this method requires additional image resources and cannot dynamically adjust the degree of blur effect. With the development of CSS3, we can achieve dynamic frosted glass effects through CSS properties without additional image resources.

CSS properties filter and backdrop-filter can be used to achieve a frosted glass effect, and they are suitable for different scenes. The filter attribute is used to filter the content of the element, while the backdrop-filter attribute can filter the background of the element. Below we will introduce these two properties in detail and give specific code examples.

1. Filter attribute

The filter attribute is a general filter that can be applied to the content of elements, including text, pictures, etc. Use this attribute to achieve blurring, brightness adjustment, contrast adjustment, saturation adjustment and other effects on the element content. Among them, the blur effect can be used to achieve the frosted glass effect.

1. Blur effect

To achieve the blur effect, you can set the value of the filter attribute to blur(value), where the value represents the degree of blur. Generally speaking, the value range is 0~10px. The larger the value, the higher the degree of blur.

.blur-effect {
  filter: blur(5px);
}

2. Brightness adjustment

If you want to adjust the brightness of the element content, you can use the brightness(value) attribute. The value of this property is a percentage, with a value of 100% representing the original brightness, a value less than 100% representing a reduced brightness, and a value greater than 100% representing an increased brightness.

.brightness-effect {
  filter: brightness(80%);
}

3. Contrast adjustment

To adjust the contrast of element content, you can use the contrast(value) attribute. The value of this property is also a percentage, with a value of 100% representing the original contrast, a value less than 100% representing a reduced contrast, and a value greater than 100% representing an increased contrast.

.contrast-effect {
  filter: contrast(150%);
}

4. Saturation adjustment

To adjust the saturation of an element's content, you can use the saturate(value) attribute. The value of this property is also a percentage, with a value of 100% indicating original saturation, a value less than 100% indicating reduced saturation, and a value greater than 100% indicating increased saturation.

.saturation-effect {
  filter: saturate(200%);
}

2. Background-filter attribute

The background-filter attribute is new to CSS3. It can be applied to the background of an element instead of the content of the element. Use this attribute to achieve effects such as blurring, brightness adjustment, contrast adjustment, saturation adjustment, etc. on the background of the element. It is also suitable for achieving a frosted glass effect.

1. Blur effect

To achieve the background blur effect, you can set the value of the backdrop-filter attribute to blur(value).

.backdrop-blur-effect {
  backdrop-filter: blur(5px);
}

2. Brightness adjustment

To adjust the brightness of the background, you can use the brightness(value) of the backdrop-filter property.

.backdrop-brightness-effect {
  backdrop-filter: brightness(80%);
}

3. Contrast adjustment

To adjust the contrast of the background, you can use the contrast (value) of the backdrop-filter attribute.

.backdrop-contrast-effect {
  backdrop-filter: contrast(150%);
}

4. Saturation adjustment

To adjust the saturation of the background, you can use the saturate(value) of the backdrop-filter property.

.backdrop-saturation-effect {
  backdrop-filter: saturate(200%);
}

To sum up, by using the filter and backdrop-filter properties of CSS, we can flexibly achieve various frosted glass effects without the need for additional image processing tools, making the page design more concise and efficient. It should be noted that since these properties are still experimental at present, the compatibility of different browsers and platforms may vary, so compatibility testing is required when using them.

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