Code snippet that can be used to check if the current page is the front page in Drupal 8 and pass custom variable to use it in twig files.
try {
$variables['home_class'] = \Drupal::service('path.matcher')->isFrontPage() ? 'home' : '';
} catch (Exception $e) {
$variables['home_class'] = '';
}
and in twig files to print our custom variable just use {{ home_class }} .
