If the sidebar is not found on WordPress, delete the CSS code

This situation seems a bit strange when it comes to applying a background color. Here is the main structure:

<section class="main-row">
    <div class="container">
        <div class="row">
            <div id="primary" class="col-sm-12 content-area">
</div>
<div id="secondary" class="col-sm-4 sidebar widget-area">
<div>
</div>
</div>
</section>

On the main row, I used CSS to edit media queries in order to adjust the width as needed:

.main-row {
  padding: 70px 0;
/* background: linear-gradient( to right, #ffffff 0%, #ffffff 62%, #f0f0f0 38%, #f0f0f0 100% ); */
}

It works fine with a sidebar, but I want to remove the background and have it solid white if there is no sidebar. Can this be done in PHP? My goal is to have the sidebar with a solid background that extends full height and width, while keeping the container and row adjusting the content to 1170px. The sidebar should have a colored background on its entirety depending on its position (left or right).

Answer №1

To add a class to the body when using a sidebar template, you can utilize the body_class filter (make sure to replace my-sidebar-template.php with your actual sidebar template name):

add_filter('body_class', 'sidebar_template_class');
function sidebar_template_class($classes){
  if(get_page_template_slug(get_the_ID()) == 'my-sidebar-template.php')
      $classes[] = 'has-sidebar';

  return $classes;
}

To remove the background for any .main-row elements that are children of body.has-sidebar, you can use CSS:

CSS

.main-row {
    background: linear-gradient( to right, #ffffff 0%, #ffffff 62%, #f0f0f0 38%, #f0f0f0 100% );
}
.has-sidebar .main-row{
    background: none;
}

Answer №2

After some experimentation, I finally came up with a more effective solution:

.sidebar .inner {
    border-left: none;
    margin-left: 59px;
    padding-left: 30px;
    background-color: #f0f0f0;
    margin-right: -3000px;
    padding-right: 3000px;
    padding-bottom: 3000px;
    margin-bottom: -3000px;
    margin-top: -130px;
    padding-top: 50px;

}

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