Definición y uso¶
El elemento <region> define los valores iniciales para los lados izquierdo, derecho, Propiedades superior, inferior, altura, ancho y zIndex de un elemento <media> que indirectamente se refiere a él mediante el uso de un elemento <descriptor>.
La posición de una región, según lo especificado por su arriba, abajo, Los atributos left y right siempre son relativos al padre. geometría, que está definida por el elemento principal <region>, o el total área del dispositivo en el caso de regiones del primer nivel de anidación.
Los atributos arriba y izquierda son la región principal atributos de posicionamiento. Colocan la esquina superior izquierda de la región en el distancia especificada desde el borde superior izquierdo de la región principal (o el borde superior izquierdo del dispositivo en el caso de la región más externa). A veces, establecer explícitamente los atributos inferior y derecha es útil. Sus valores indican la distancia entre el extremo derecho de la región esquina y la esquina inferior derecha de la región principal (o el dispositivo borde inferior derecho en el caso de la región más externa).
Las regiones secundarias no pueden permanecer fuera del área establecida por sus padres regiones.
El atributo zIndex especifica la precedencia de superposición de regiones, donde las regiones con mayores valores zIndex se apilan encima de regiones con valores zIndex más pequeños.
Sintaxis¶
| Elemento | Atributos | Contenido | Padre |
|---|---|---|---|
| <region> | id, título, izquierda, derecha, arriba, abajo, alto, ancho, zIndex | (<region>)* | <regionBase> o <region> |
Atributos¶
| Name | Value | Description |
|---|---|---|
| id | It may receive any string value that begins with a letter or an underscore and that only contains letters, digits, <".">, and <"_">. | The id attribute uniquely identifies the element within a document. |
| title | String. | The title attribute contains advisory information. Values of the title attribute may be rendered by user agents in a variety of ways. |
| left | A real number in the range [0,100] ending with the character <"%"> (e.g. "30%"), or a positive integer specifying the attribute value in pixels. For pixel values, the "px" unit qualifier may be omitted. The default value is "0%", if the attribute value cannot be computed from the width and right attributes. |
Left position of the content relative to its parent region (or the device in the case of the outermost region), expressed as a percentage of the parent region width dimension (or the device width in the case of the outermost region), or as an absolute value.It places the left position of the region in the specified distance away from the left edge of the parent region (or the device left edge in the case of the outermost region). |
| right | A real number in the range [0,100] ending with the character <"%"> (e.g. "30%"), or a positive integer specifying the attribute value in pixels. For pixel values, the "px" unit qualifier may be omitted. The default value is "0%", if the attribute value cannot be computed from the width and left attributes. |
Right position of the content relative to its parent region (or the device in the case of the outermost region), expressed as a percentage of the parent region width dimension (or the device width in the case of the outermost region), or as an absolute value.It places the right position of the region in the specified distance away from the right edge of the parent region (or the device right edge in the case of the outermost region). |
| top | A real number in the range [0,100] ending with the character <"%"> (e.g. "30%"), or a positive integer specifying the attribute value in pixels. For pixel values, the "px" unit qualifier may be omitted. The default value is "0%", if the attribute value cannot be computed from the height and bottom attributes. |
Top position of the content relative to its parent region (or the device in the case of the outermost region), expressed as a percentage of the parent region height dimension (or the device height in the case of the outermost region), or as an absolute value.It places the top position of the region in the specified distance away from the top edge of the parent region (or the device top edge in the case of the outermost region). |
| bottom | A real number in the range [0,100] ending with the character <"%"> (e.g. "30%"), or a positive integer specifying the attribute value in pixels. For pixel values, the "px" unit qualifier may be omitted. The default value is "0%", if the attribute value cannot be computed from the height and top attributes. |
Bottom position of the content relative to its parent region (or the device in the case of the outermost region), expressed as a percentage of the parent region height dimension (or the device height in the case of the outermost region), or as an absolute value.It places the bottom position of the region in the specified distance away from the bottom edge of the parent region (or the device bottom edge in the case of the outermost region). |
| height | A real number in the range [0,100] ending with the character <"%"> (e.g. "30%"), or a positive integer specifying the attribute value in pixels. For pixel values, the "px" unit qualifier may be omitted. The default value is "100%" of the parent region height dimension (or the device height in the case of the outermost region). |
Height of the content to be exhibited, expressed as a percentage of the parent region height dimension (or the device height in the case of the outermost region), or as an absolute value. |
| width | A real number in the range [0,100] ending with the character <"%"> (e.g. "30%"), or a positive integer specifying the attribute value in pixels. For pixel values, the "px" unit qualifier may be omitted. The default value is "100%" of the parent region width dimension (or the device width in the case of the outermost region). |
Width of the content to be exhibited, expressed as a percentage of the parent region width dimension (or the device width in the case of the outermost region), or as an absolute value. |
| zIndex | An integer number in the range [0,255]. The default value is 0. |
The zIndex attribute specifies the superposition precedence, where objects with greater zIndex values are stacked on top of objects with smaller zIndex values. |