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Deeply understand the effects of CSS shadows: detailed explanation and practice of box-shadow attributes

introduce

     box-shadowIt is an attribute in CSS to add shadow effects to elements. It allows you to control the size, color, blur,Offsetand shadows inside and outside.


grammar

box-shadow: h-shadow v-shadow blur spread color inset;
  • h-shadow: The horizontal shadow offset.
  • v-shadow: The shadow offset in the vertical direction.
  • blur: The blur radius of the shadow, optional parameters.
  • spread: Extended size of shadow, optional parameters.
  • color: The color of the shadow.
  • inset: Optional parameter to create inner shadow effects.

Example

  1. .shadow {
  2. box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  3. }
  4. .inner-shadow {
  5. box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  6. }
  7. .multiple-shadows {
  8. box-shadow:
  9. 2px 2px 4px rgba(0, 0, 0, 0.5),
  10. -2px -2px 4px rgba(255, 255, 255, 0.3);
  11. }

explain

  • .shadowElements of the class will have a shadow effect that is offset by 2 pixels to the lower right, with a radius of 4 pixels, a black color and a transparency of 0.5.
  • .inner-shadowElements of the class will have an internal shadow effect, with a blur radius of 10 pixels, a black color and a transparency of 0.3.
  • .multiple-shadowsElements of the class will have two shadow effects at the same time, one offsets by 2 pixels to the lower right and the other offsets by 2 pixels to the upper left, with different colors and transparency respectively.

Summarize

By usingbox-shadowProperties, you can easily add shadow effects to elements to enhance their appearance and visual effects. Adjusting the values ​​of different parameters can achieve various shadow effects.

Hope this tutorial helps you understand and use itbox-shadowproperty! If you have any other questions, feel free to ask.