{"id":18568,"date":"2024-02-20T13:00:00","date_gmt":"2024-02-20T12:00:00","guid":{"rendered":"https:\/\/carontestudio.com\/blog\/?p=18568"},"modified":"2024-02-22T13:23:17","modified_gmt":"2024-02-22T12:23:17","slug":"que-es-y-ejemplos-de-como-usar-has-la-pseudo-clase-de-css","status":"publish","type":"post","link":"https:\/\/carontestudio.com\/blog\/que-es-y-ejemplos-de-como-usar-has-la-pseudo-clase-de-css\/","title":{"rendered":"Qu\u00e9 es y ejemplos de c\u00f3mo usar :has(), la pseudo-clase de CSS"},"content":{"rendered":"\n<p>Ya vimos en el post de <a href=\"https:\/\/carontestudio.com\/blog\/novedades-css-2024\/\">novedades CSS 2024<\/a> como ahora <code>:has() <\/code>ya<strong> tiene implementaci\u00f3n en todos los navegadores<\/strong>, as\u00ed que podemos comenzar a usarlo. Esto nos ofrece un mont\u00f3n de posibilidades nuevas que vamos a ver en este art\u00edculo.<\/p>\n\n\n\n<p>Entre otras cosas, esto nos va a hacer escribir <strong>menos <em>JavaScript <\/em>para manipular el <em>DOM<\/em><\/strong><em> <\/em>y  estar a\u00f1adiendo y quitando clases. Pero bueno, vamos al l\u00edo, veamos una serie de ejemplos sobre c\u00f3mo usar <code>:has()<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ejemplos sobre c\u00f3mo usar :has()<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00f3mo mostrar un logo diferente en cada p\u00e1gina<\/h3>\n\n\n\n<p>Se puede dar el caso  en el que dentro de una misma web las p\u00e1ginas sean diferentes, con diferente color de fondo de manera que tengamos que utilizar un logo y en otra p\u00e1gina la versi\u00f3n invertida (la clara o la oscura). Antes, para esto, ten\u00edamos que escribir parte de <em>JavaScript <\/em>condicionando a depende qu\u00e9 p\u00e1gina. Ahora podr\u00edamos hacer algo tal que as\u00ed:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;style>\n      .logo {\n        width: 100px;\n        height: 100px;\n        background-color: #bbb;\n      }\n\n      body:has(.pagina-clara) .logo {\n        background-color: #000;\n      }\n&lt;\/style>\n\n\n&lt;header>\n   &lt;div class=\"logo\">\n      &lt;img src=\"logo.png\" alt=\"Logo de la empresa\" \/>\n   &lt;\/div>\n&lt;\/header>\n&lt;main>\n   &lt;section class=\"pagina-clara\">\n      &lt;p>Lorem ipsum dolor sit amet consectetur adipisicing elit.&lt;\/p>\n   &lt;\/section>\n&lt;\/main>\n<\/code><\/pre>\n\n\n\n<p>Hemos hecho un ejemplo sencillo usando background-color, pero podr\u00eda cambiarse el estilo por <code>\u201cbackground: url(\u2018nuestro-logo.png\u2019) <\/code>o usando un <code>filter: invert()<\/code> por ejemplo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Uso de<\/strong> <strong>:has() con el selector de hermanos adyacentes (+)<\/strong><\/h3>\n\n\n\n<p>Otro uso que se le puede dar al <code>:has() <\/code>es el hecho de que el hermano del elemento que cumpla la condici\u00f3n reciba los estilos, he cogido este c\u00f3digo de <a href=\"https:\/\/stackoverflow.com\/questions\/77331185\/css-has-hover-selector\" target=\"_blank\" rel=\"noreferrer noopener\">StackOverflow<\/a> y lo he adaptado un poco:<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"result\" data-slug-hash=\"XWGEMRM\" data-user=\"David-Boo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/David-Boo\/pen\/XWGEMRM\">\n  Untitled<\/a> by David Boo (<a href=\"https:\/\/codepen.io\/David-Boo\">@David-Boo<\/a>)\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>En este caso que planteamos, al hacer <em>hover <\/em>sobre uno de los elementos, el contrario recibe los estilos Podr\u00eda hacerse tambi\u00e9n de forma que ambos elementos recibieran dichos estilos por ejemplo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00f3mo dar estilos a elementos <em>label<\/em><\/h3>\n\n\n\n<p>Es muy \u00fatil, especialmente con los <em>label<\/em> de los elementos inputs. Muchas veces nos encontramos formularios con los inputs dentro del <em>label<\/em>, pero muchas otras es f\u00e1cil encontrarse estos como elementos hermanos. Quiz\u00e1 porque puedas tener tambi\u00e9n alg\u00fan elemento HTML en medio o por alguna otra raz\u00f3n, como que sea, por ejemplo, un <em>plugin <\/em>de <em>WordPress <\/em>que viene as\u00ed definido. As\u00ed que, para dar estilos a la etiqueta en funci\u00f3n del estado del input, podemos hacerlo con <code>:has<\/code> de esta forma:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;style&gt;\n      label:has(+ input:invalid),\n      label:has(+ input:invalid)::before {\n        content: \"\u2716 \";\n        color: red;\n      }\n\n      label:has(+ input:valid),\n      label:has(+ input:valid)::before {\n        content: \"\u2713 \";\n        color: green;\n      }\n    &lt;\/style&gt;\n  &lt;\/head&gt;\n  &lt;body&gt;\n    &lt;form&gt;\n      &lt;div&gt;\n        &lt;label for=\"email\"&gt;Email: &lt;\/label&gt;\n        &lt;input type=\"email\" id=\"email\" required \/&gt;\n      &lt;\/div&gt;\n    &lt;\/form&gt;\n  &lt;\/body&gt;\n\n<\/code><\/pre>\n\n\n\n<p>Es m\u00e1s, podr\u00edamos ir un poco m\u00e1s all\u00e1 y cambiar directamente el color del bot\u00f3n para que el usuario se percate que el formulario tiene alg\u00fan campo que no es v\u00e1lido:<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"css,result\" data-slug-hash=\"MWxVpEj\" data-user=\"David-Boo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/David-Boo\/pen\/MWxVpEj\">\n  Untitled<\/a> by David Boo (<a href=\"https:\/\/codepen.io\/David-Boo\">@David-Boo<\/a>)\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C\u00f3mo seleccionar todos los elementos hermanos de otro destacado (hover) en CSS usando la pseudoclase :has()<\/strong><\/h3>\n\n\n\n<p>Esta me parece particularmente interesante. Para hacer esto antes se ha necesitado utilizar JavaScript o crear un contendor que conten\u00eda todos los elementos sobre los que hacer <em>hover<\/em> y, al entrar al contendor con el cursor, ya se aplicaban los estilos a todos los dem\u00e1s. Con la <em>pseudo-clase<\/em> <code>:has<\/code> eso cambia. Ahora vamos a poder <strong>hacer <em>hover <\/em>sobre un elemento y aplicar los estilos en todos los dem\u00e1s<\/strong>. He aqu\u00ed un ejemplo con el c\u00f3digo:<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"result\" data-slug-hash=\"PoLRpOv\" data-user=\"David-Boo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/David-Boo\/pen\/PoLRpOv\">\n  Untitled<\/a> by David Boo (<a href=\"https:\/\/codepen.io\/David-Boo\">@David-Boo<\/a>)\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>La parte interesante de todo esto es el selector que hace esto posible:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.card:has(~ .card:hover),\n.card:hover ~ .card:not(:hover) \n<\/code><\/pre>\n\n\n\n<p>El primero selecciona todos los hermanos anteriores del elemento al cual se aplica el <em>hover<\/em> y el segundo lo aplica a los posteriores.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C\u00f3mo generar quantity queries con :nth-child y :has()<\/strong><\/h3>\n\n\n\n<p>Combinando<code> :nth-child<\/code> y <code>:has() <\/code>podemos <strong>dar estilos en funci\u00f3n a la de n\u00famero de elementos<\/strong> que tenga un contenedor, ser\u00eda tan sencillo como seleccionar el contenedor y preguntarle si contiene un \u201cn\u201d n\u00famero de hijos, de esta forma:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.container:has(nth-child(10))<\/code><\/pre>\n\n\n\n<p>As\u00ed, si contiene un d\u00e9cimo hijo, es que tiene al menos 10. Vamos con un ejemplo:<\/p>\n\n\n\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"result\" data-slug-hash=\"gOEemeJ\" data-user=\"David-Boo\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/David-Boo\/pen\/gOEemeJ\">\n  Untitled<\/a> by David Boo (<a href=\"https:\/\/codepen.io\/David-Boo\">@David-Boo<\/a>)\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<script async src=\"https:\/\/cpwebassets.codepen.io\/assets\/embed\/ei.js\"><\/script>\n\n\n\n<p>Vemos como en el ejemplo, seg\u00fan vamos aumentando el n\u00famero, los bloques van cambiando de color y haci\u00e9ndose m\u00e1s peque\u00f1os. En este caso hemos utilizado como selector el propio div, pero podr\u00eda usarse tambi\u00e9n el selector universal (*) para que esto pasase si tuviera elementos de cualquier tipo. Combinado con <em>grid <\/em>podr\u00edamos incluso disponer los elementos de forma diferente dependiendo del n\u00famero que fueran sin tener que usar <em>JavaScript<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00f3mo a\u00f1adir indicadores en men\u00fa dropdown<\/h3>\n\n\n\n<p>En las barras de <strong>navegaci\u00f3n con submen\u00fas<\/strong>, suele aparecer un indicador de que un elemento de la lista contiene un submen\u00fa, con :has() podemos darle estilos muy f\u00e1ciles de esta manera:<br><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>      nav ul li:has(ul) {\n        position: relative;\n      }\n\n      nav ul li:has(ul):after {\n        content: \"\u2304\";\n        position: absolute;\n        color: #fff;\n        right: 0;\n        top: 50%;\n        transform: translateY(-50%);\n      }\n<\/code><\/pre>\n\n\n\n<p>As\u00ed que, si un elemento de la lista <code>li<\/code> contiene un <code>ul<\/code>, entonces le a\u00f1adimos la flechita que indica que en dicho elemento tenemos un submen\u00fa que se va a desplegar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusi\u00f3n<\/h2>\n\n\n\n<p>Estas son unas ideas de uso de <code>:has()<\/code>, a lo mejor a partir de ahora te vas a preguntar un par de veces si puedes resolver estas situaciones directamente con <em>CSS <\/em>sin tener que pasar por usar <em>JavaScript<\/em> en estos casos a la hora de realizar tus <a href=\"https:\/\/carontestudio.com\/diseno-web\/diseno-web-vitoria\/\">dise\u00f1os y desarrollos web<\/a>.<\/p>\n\n\n\n<p>\u00a1Te animamos a que pruebes esta propiedad de <em>CSS tan <\/em>interesante!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El selector :has() ahora est\u00e1 disponible en todos los navegadores, lo que abre nuevas posibilidades en manipulaci\u00f3n del DOM y estilos en CSS. Se muestran ejemplos como cambiar el logo seg\u00fan la p\u00e1gina, estilizar elementos hermanos adyacentes con hover, dar estilo a etiquetas seg\u00fan el estado de los inputs, aplicar estilos a elementos hermanos con hover, generar queries de cantidad y agregar indicadores a men\u00fas desplegables. <\/p>\n","protected":false},"author":18,"featured_media":18581,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[94],"tags":[93],"class_list":["post-18568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diseno-web","tag-css"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u00f3mo utilizar :has() la pseudo clase de CSS - CaronteWebStudio<\/title>\n<meta name=\"description\" content=\"Descubre c\u00f3mo usar :has() para simplificar tus desarrollos y dar estilos a elementos en CSS. \u00a1Optimiza tus dise\u00f1os web sin JavaScript!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/carontestudio.com\/blog\/que-es-y-ejemplos-de-como-usar-has-la-pseudo-clase-de-css\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00f3mo utilizar :has() la pseudo clase de CSS - 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