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Blocks - Breadcrumbs

This documentation provides information about the breadcrumb block that Yoast SEO provides.

Breadcrumbs in local environments

In local environments, or in websites that disable the indexable creation in general, breadcrumbs are not working properly.

Specifically, in those setups the hierarchy of a breadcrumb path might be missing intermediate nodes like the category a post belongs to, or a parent page of a subpage.

Filters​

The wpseo_breadcrumb_output filter takes the output of the breadcrumb. Make sure not to empty the output, just replace or add data. An example:

add_filter( 'wpseo_breadcrumb_output', 'override_home_icon' );

/**
 * Replace the home text with an icon.
 *
 * @param  string $original_breadcrumbs The whole breadcrumbs HTML.
 * @return string
 */
function override_home_icon( string $original_breadcrumbs ): string {
    $new_home = \str_replace( '>Home<', ' aria-label="Home"><i class="fa fa-homeicon" aria-hidden="true"></i><', $original_breadcrumbs );

    return $new_home;
}

The wpseo_breadcrumb_single_link allows changing of each link being put out by the Yoast SEO breadcrumbs class. It takes in the generated link and the source breadcrumb information. An example:

add_filter( 'wpseo_breadcrumb_single_link', 'remove_current_page' );

/**
 * Remove current page from breadcrumbs.
 *
 * @param string $link       The output string.
 * @param array  $breadcrumb The breadcrumb link array.
 */
function remove_current_page( $link ): string {
    if ( strpos( $link, 'breadcrumb_last' ) !== false ) {
        $link = '';
    }

    return $link;
}

The wpseo_breadcrumb_output_id allows changing the HTML ID on the Yoast SEO breadcrumbs wrapper element. It only called when there it no an ID already present. An example:

add_filter( 'wpseo_breadcrumb_output_id', 'add_breadcrumb_id' );

/**
 * Allow changing the HTML ID on the Yoast SEO breadcrumbs wrapper element.
 *
 * @param string $id ID to add to the wrapper element.
 */
function add_breadcrumb_id( $id ): string {
  return 'my-id';
}

The wpseo_breadcrumb_output_class allows changing the HTML class on the Yoast SEO breadcrumbs wrapper element. It is only called when there is no class already present. An example:

add_filter( 'wpseo_breadcrumb_output_class', 'add_breadcrumb_class' );

/**
 * Allow changing the HTML class on the Yoast SEO breadcrumbs wrapper element.
 *
 * @param string $class class to add to the wrapper element.
 */
function add_breadcrumb_class( $class ): string {
  return 'my-class my-other-class';
}

The wpseo_breadcrumb_output_wrapper allows changing the Yoast SEO breadcrumbs wrapper element. It is called with a default span value. The output should be an valid HTML element. An example:

add_filter( 'wpseo_breadcrumb_output_wrapper', 'replace_breadcrumb_wrapper' );

/**
 * Replace the wrapper around the breadcrumbs
 *
 * @param  string $output What it normally outputs.
 * @return string
 */
function replace_breadcrumb_wrapper( string $output ): string {
    $output = 'ol';

    return $output;
}

The wpseo_breadcrumb_single_link_wrapper allows changing the Yoast SEO link wrapper element. It is called with a default span value. The output should be an valid HTML element. An example:

add_filter( 'wpseo_breadcrumb_single_link_wrapper', 'replace_link_wrapper' );

/**
 * Replace the wrappers around the links.
 *
 * @param  string $output What it normally outputs.
 * @return string
 */
function replace_link_wrapper( string $output ): string {
    $output = 'li';

    return $output;
}

The wpseo_breadcrumb_separator allows changing the Yoast SEO seperator. It only called with a default value taken from the Yoast SEO settings. The output should be valid HTML. An example to completely remove the separator:

add_filter( 'wpseo_breadcrumb_separator', 'replace_breadcrumb_separator' );

/**
 * Replace the breadcrumbs separators.
 *
 * @param  string $output What it normally outputs.
 * @return string
 */
function replace_breadcrumb_separator( string $output ): string {
    $output = '';

    return $output;
}

Schema output​

The Yoast SEO breadcrumb block output a breadcrumb schema piece which is documented in Schema piece - Breadcrumb