freeCodeCamp/guide/spanish/css/box-shadow/index.md

title	localeTitle
Box Shadow	Sombra de la caja

Sombra de la caja

La propiedad box-shadow asocia una o más sombras alrededor del marco de un elemento (puede estar dentro). Es una opción que le da el poder de diseñar fácilmente maravillosos efectos de sombra. Las sombras de cuadro son una excelente manera de elevar los elementos visuales de su página web.

Una sombra de cuadro se puede describir con varias propiedades, que incluyen:

• X e Y desplazan del elemento
• difuminar y extender el radio
• color

Sintaxis:

  div { 
    box-shadow: none | [inset? && [ <offset-x> <offset-y> <blur-radius>? <spread-radius>? <color>? ] ]# 
    } 

• inset (default: none)

If not specified, the shadow is assumed to be a drop shadow (as if the box were raised above the content). The presence of the inset keyword changes the shadow to one inside the frame

• offset-x offset-y

These are two length values to set the shadow offset. specifies the horizontal distance. Negative values place the shadow to the left of the element. offset-y specifies the vertical distance. Negative values place the shadow above the element. See length for possible units.

• blur-radius (default: 0)

This is a third length value. The larger this value, the bigger the blur, so the shadow becomes bigger and lighter. Negative values are not allowed. If not specified, it will be 0 (the shadow's edge is sharp).

• spread-radius (default: 0)

This is a fourth value. Positive values will cause the shadow to expand and grow bigger, negative values will cause the shadow to shrink. If not specified, it will be 0 (the shadow will be the same size as the element).

• color

This value is used to set the color of the shadow, usually defined with hex #000000, rgba value rgba(55,89,88,0.8) or rgb value rgb(55,89,88)

Extended

To maximize compatibility, it is recommended that you declare box shadow property for moz-appearance and webkit, this extends the normal syntax to:

css div { caja de sombra: ninguna | \[¿recuadro? && \[ ? ? ? \]\] # -moz-box-shadow: ninguno | \[¿recuadro? && \[ ? ? ? \]\] # -webkit-box-shadow: ninguno | \[¿recuadro? && \[ ? ? ? \]\] # }

However, this step can be ignored if it is creating confusion, as moz property and webkit property will only work in specific applications such as Firefox, and are not on a standards track.

Examples

Basic use

css div { ancho: 200px; altura: 50px; color de fondo: # 333; box-shadow: 10px 10px 5px #ccc; }

10px - offset-x 10px - offset-y 5px - blur #ccc - light gray color

It will display

Inside box shadow

css div { ancho: 200px; altura: 50px; color de fondo: # 333; cuadro de sombra: inserción 10px 10px 5px #ccc; }

It uses very similar code, but with inset value, which displays shadow inside the div element

Multiple box shadows

css div { ancho: 200px; altura: 50px; color de fondo: # 333; box-shadow: recuadro 10px 10px 5px #ccc, 10px 10px 5px #ccc; } \`\` \`

Puede combinar las dos piezas anteriores de recuadros de sombras con una coma para obtener múltiples recuadros en el mismo div

#### Más información

*   Docs: [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/box-shadow)