{"id":5719,"date":"2013-01-02T15:15:26","date_gmt":"2013-01-02T15:15:26","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=5719"},"modified":"2015-07-14T22:11:58","modified_gmt":"2015-07-14T22:11:58","slug":"firt-child-last-child-nth-child","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/firt-child-last-child-nth-child\/","title":{"rendered":"Firt-child, last-child y nth-child"},"content":{"rendered":"<p>Las pseudo-clases son selectores que nos permiten a\u00f1adir diferentes estilos a un mismo elemento dependiendo de determinadas condiciones.\u00a0Ampl\u00edan\u00a0nuestras posibilidades sin necesidad de modificar el c\u00f3digo HTML.<\/p>\n<p>Los selectores :first-child y :last-child existen a partir de CSS2.1, por lo que funcionan en todos los navegadores, y tienen como funci\u00f3n permitirnos dar estilo al primer hijo y al \u00faltimo respectivamente. Esto se puede aplicar a los p\u00e1rrafos de un texto, a links o a cualquier otro elemento HTML.<\/p>\n<p>En el ejemplo que vamos a ilustrar utilizaremos una lista desordenada para demostrar el funcionamiento. Vamos a crear un men\u00fa sencillo donde daremos diferentes estilos al primero, al \u00faltimo y a cualquier otro.<\/p>\n<p>Vamos a crear el siguiente men\u00fa de ejemplo:<\/p>\n<pre>&lt;ul id=\"menu\"&gt;\r\n\u00a0\u00a0 \u00a0&lt;li&gt;&lt;a href=\"#\"&gt;Inicio&lt;\/a&gt;&lt;\/li&gt;\r\n\u00a0\u00a0\u00a0 &lt;li&gt;&lt;a href=\"#\"&gt;Categor\u00edas&lt;\/a&gt;&lt;\/li&gt;\r\n\u00a0\u00a0\u00a0 &lt;li&gt;&lt;a href=\"#\"&gt;Servicios&lt;\/a&gt;&lt;\/li&gt;\r\n\u00a0\u00a0\u00a0 &lt;li&gt;&lt;a href=\"#\"&gt;Soporte t\u00e9cnico&lt;\/a&gt;&lt;\/li&gt;\r\n\u00a0\u00a0\u00a0 &lt;li&gt;&lt;a href=\"#\"&gt;Contacto&lt;\/a&gt;&lt;\/li&gt;\r\n&lt;\/ul&gt;<\/pre>\n<p>Y le vamos a dar el siguiente estilo sencillo utilizando los selectores que estamos comentando:<\/p>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/01\/menu.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-5722\" alt=\"menu\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/01\/menu.png\" width=\"523\" height=\"65\" srcset=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/01\/menu.png 523w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/01\/menu-300x37.png 300w\" sizes=\"auto, (max-width: 523px) 100vw, 523px\" \/><\/a>Como puedes observar, le estamos dando un estilo diferente (background) al primer elemento del men\u00fa, al \u00faltimo y a otro seleccionado. Esto lo conseguimos a\u00f1adiendo lo siguiente en nuestra hoja de estilos:<\/p>\n<pre>#menu li:first-child {\r\n\u00a0\u00a0 \u00a0background-color:#FF9900;\r\n}\r\n\r\n#menu li:last-child {\r\n\u00a0\u00a0 \u00a0background-color: #0099CC;\r\n}\r\n\r\n#menu li:nth-child(3) {\r\n\u00a0\u00a0 \u00a0background-color: #00CC00;\r\n}<\/pre>\n<p>Las posiblidades son m\u00faltiples.<\/p>\n<p>Ver el ejemplo en funcionamiento<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Las pseudo-clases son selectores que nos permiten a\u00f1adir diferentes estilos a un mismo elemento dependiendo de determinadas condiciones.\u00a0Ampl\u00edan\u00a0nuestras posibilidades sin necesidad de modificar el c\u00f3digo HTML. Los selectores :first-child y :last-child existen a partir de CSS2.1, por lo que funcionan en todos los navegadores, y tienen como funci\u00f3n permitirnos dar estilo al primer hijo y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4626,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-5719","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-css"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Firt-child, last-child y nth-child - Jose Aguilar Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Firt-child, last-child y nth-child - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"Las pseudo-clases son selectores que nos permiten a\u00f1adir diferentes estilos a un mismo elemento dependiendo de determinadas condiciones.\u00a0Ampl\u00edan\u00a0nuestras posibilidades sin necesidad de modificar el c\u00f3digo HTML. 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