How to generate absolute URL for breadcrumbs?

Question

I am use Easy Breadcrumb module for a D8 site. I have everything I need with this module as it alters the existing Breadcrumb block, but it outputs relative URLs.

How can I change the relative URLs to absolute?

Current issue (Breadcrumb Output):

<ol>
<li>
    <a href="/level-one">level One</a>
</li>
<li>
    <a href="/level-one/level-two">level two</a>
</li>
<li>
    <a href="/level-one/level-two/level-three">level three</a>
</li>
<li>
Current Level
</li>
</ol>

Expected output:

<ol>
<li>
    <a href="https://www.domain.com/level-one">level One</a>
</li>
<li>
    <a href="https://www.domain.com/level-one/level-two">level two</a>
</li>
<li>
    <a href="https://www.domain.com/level-one/level-two/level-three">level three</a>
</li>
<li>
Current Level
</li>
</ol>

Answer 1

You can alter the breadcrumbs of other bread crumb builders (core or contrib) in a hook_system_breadcrumb_alter():

/**
 * Implements hook_system_breadcrumb_alter().
 */
function mymodule_system_breadcrumb_alter(\Drupal\Core\Breadcrumb\Breadcrumb &$breadcrumb, \Drupal\Core\Routing\RouteMatchInterface $route_match, array $context) {
  $links = $breadcrumb->getLinks();
  foreach ($links as $link) {
    $url = $link->getUrl();
    $url->setAbsolute();
  }
}