function pwa_html_head_alter in Progressive Web App 7.2

Implements hook_html_head_alter().

Make sure a viewport meta exists. Necessary for Lighthouse 100%.

File

./pwa.module, line 418

Code

function pwa_html_head_alter(&$head_elements) {
  $has_viewport_meta = FALSE;

  // Check if the viewport meta already exists, add it if it doesn't.
  foreach ($head_elements as $key => $element) {
    if (!empty($element['#tag']) && $element['#tag'] == 'meta' && (!empty($element['#attributes']['name']) && $element['#attributes']['name'] == 'viewport')) {
      $has_viewport_meta = TRUE;
      break;
    }
  }
  if (!$has_viewport_meta) {
    $head_elements['viewport'] = [
      '#type' => 'html_tag',
      '#tag' => 'meta',
      '#attributes' => [
        'name' => 'viewport',
        'content' => 'width=device-width, initial-scale=1',
      ],
      '#weight' => 10,
    ];
  }

  // Add Apple related meta tags, do it in the alter to avoid adding the link
  // elements at the top of the page.
  if (!variable_get('pwa_apple_meta_enable', TRUE)) {
    return;
  }
  _pwa_apple_html_head_alter($head_elements);
}