app/views/pwa/offline.html.haml


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= link_to root_path do
  = render 'shared/logo.svg'
%h1= _('Offline')
.container
  %h3= _('You are currently offline, or the GitLab instance is not reachable.')
  %p= _("In the background, we're attempting to connect you again.")
  -# haml-lint:disable InlineJavaScript
  :javascript
    window.addEventListener('online', () => {
      window.location.reload();
    });

    async function checkNetworkAndReload() {
      try {
        const response = await fetch('.');
        // Verify we get a valid response from the server
        if (response.status >= 200 && response.status < 500) {
          window.location.reload();
          return;
        }
      } catch {
        // Unable to connect to the server, ignore.
      }
      window.setTimeout(checkNetworkAndReload, 2500);
    }

    if (window.location.pathname.endsWith('/-/offline')) {
      return;
    }

    checkNetworkAndReload();