{"id":1439,"date":"2024-08-02T06:28:35","date_gmt":"2024-08-02T04:28:35","guid":{"rendered":"https:\/\/blog.sutilweb.eu\/?page_id=1439"},"modified":"2024-08-02T06:28:35","modified_gmt":"2024-08-02T04:28:35","slug":"19-cambiar-variables-css-con-javascript","status":"publish","type":"page","link":"https:\/\/sutilweb.eu\/index.php\/lenguajes\/css3\/css3-avanzado\/19-cambiar-variables-css-con-javascript\/","title":{"rendered":"19. Cambiar variables CSS con Javascript"},"content":{"rendered":"\n

Las variables CSS<\/strong> tienen acceso al DOM<\/strong>, lo que significa que puedes cambiarlas con Javascript<\/strong>. Este es un ejemplo de c\u00f3mo puede crear un script<\/strong> para mostrar y cambiar la variable –blue<\/em> del ejemplo utilizado en las p\u00e1ginas anteriores.<\/p>\n\n\n\n\n\n\n\n

Ejm<\/strong><\/p>\n\n\n\n

<!DOCTYPE html>
<html>
  <head>
    <style>
      :root {
        --blue: #1e90ff;
        --white: #ffffff;
      }

      body {
        background-color: var(--blue);
      }

      h2 {
        border-bottom: 2px solid var(--blue);
      }

      .container {
        color: var(--blue);
        background-color: var(--white);
        padding: 15px;
      }

      .container button {
        background-color: var(--white);
        color: var(--blue);
        border: 1px solid var(--blue);
        padding: 5px;
      }
    <\/style>

    <script>
      \/\/ Get the root element
      var r = document.querySelector(\":root\");

      \/\/ Create a function for getting a variable value
      function myFunction_get() {
        \/\/ Get the styles (properties and values) for the root
        var rs = getComputedStyle(r);
        \/\/ Alert the value of the --blue variable
        alert(\"The value of --blue is: \" + rs.getPropertyValue(\"--blue\"));
      }

      \/\/ Create a function for setting a variable value
      function myFunction_set() {
        \/\/ Set the value of variable --blue to another value (in this case \"lightblue\")
        r.style.setProperty(\"--blue\", \"lightblue\");
      }
    <\/script>
  <\/head>
  <body>
    <h1>Get and Change CSS Variable With JavaScript<\/h1>

    <div class=\"container\">
      <h2>Lorem Ipsum<\/h2>
      <p>
        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam semper
        diam at erat pulvinar, at pulvinar felis blandit.
      <\/p>
      <p>
        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam semper
        diam at erat pulvinar, at pulvinar felis blandit.
      <\/p>
      <p>
        <button>Yes<\/button>
        <button>No<\/button>
      <\/p>
    <\/div>
    <br \/>

    <button type=\"button\" onclick=\"myFunction_get()\">
      Get CSS Variable with JavaScript
    <\/button>
    <button type=\"button\" onclick=\"myFunction_set()\">
      Change CSS Variable with JavaScript
    <\/button>
  <\/body>
<\/html><\/pre>\n","protected":false},"excerpt":{"rendered":"
Las variables CSS tienen acceso al DOM, lo que significa que puedes cambiarlas con Javascript. Este es un ejemplo de […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1367,"menu_order":18,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-1439","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"Sutil Web","author_link":"https:\/\/sutilweb.eu\/index.php\/author\/sutilweb\/"},"uagb_comment_info":0,"uagb_excerpt":"Las variables CSS tienen acceso al DOM, lo que significa que puedes cambiarlas con Javascript. Este es un ejemplo de […]","_links":{"self":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/1439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/comments?post=1439"}],"version-history":[{"count":3,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/1439\/revisions"}],"predecessor-version":[{"id":1442,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/1439\/revisions\/1442"}],"up":[{"embeddable":true,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/1367"}],"wp:attachment":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/media?parent=1439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}