devdocs/assets/javascripts/templates/pages/offline_tmpl.coffee

app.templates.offlinePage = (docs) -> """
  <h1 class="_lined-heading">Offline Documentation</h1>

  <div class="_docs-tools">
    <label>
      <input type="checkbox" name="autoUpdate" value="1" #{if app.settings.get('manualUpdate') then '' else 'checked'}>Install updates automatically
    </label>
    <div class="_docs-links">
      <button type="button" class="_btn-link" data-action-all="install">Install all</button><button type="button" class="_btn-link" data-action-all="update"><strong>Update all</strong></button><button type="button" class="_btn-link" data-action-all="uninstall">Uninstall all</button>
    </div>
  </div>

  <div class="_table">
    <table class="_docs">
      <tr>
        <th>Documentation</th>
        <th class="_docs-size">Size</th>
        <th>Status</th>
        <th>Action</th>
      </tr>
      #{docs}
    </table>
  </div>
  <p class="_note"><strong>Note:</strong> your browser may delete DevDocs's offline data if your computer is running low on disk space and you haven't used the app in a while. Load this page before going offline to make sure the data is still there.
  <h2 class="_block-heading">Questions & Answers</h2>
  <dl>
    <dt>How does this work?
    <dd>Each page is cached as a key-value pair in <a href="https://devdocs.io/dom/indexeddb_api">IndexedDB</a> (downloaded from a single file).<br>
        The app also uses <a href="https://devdocs.io/dom/service_worker_api/using_service_workers">Service Workers</a> and <a href="https://devdocs.io/dom/web_storage_api">localStorage</a> to cache the assets and index files.
    <dt>Can I close the tab/browser?
    <dd>#{canICloseTheTab()}
    <dt>What if I don't update a documentation?
    <dd>You'll see outdated content and some pages will be missing or broken, because the rest of the app (including data for the search and sidebar) uses a different caching mechanism that's updated automatically.
    <dt>I found a bug, where do I report it?
    <dd>In the <a href="https://github.com/freeCodeCamp/devdocs/issues">issue tracker</a>. Thanks!
    <dt>How do I uninstall/reset the app?
    <dd>Click <a href="#" data-behavior="reset">here</a>.
    <dt>Why aren't all documentations listed above?
    <dd>You have to <a href="/settings">enable</a> them first.
  </dl>
"""

canICloseTheTab = ->
  if app.ServiceWorker.isEnabled()
    """ Yes! Even offline, you can open a new tab, go to <a href="//devdocs.io">devdocs.io</a>, and everything will work as if you were online (provided you installed all the documentations you want to use beforehand). """
  else
    reason = "aren't available in your browser (or are disabled)"

    if app.config.env != 'production'
      reason = "are disabled in your development instance of DevDocs (enable them by setting the <code>ENABLE_SERVICE_WORKER</code> environment variable to <code>true</code>)"

    """ No. Service Workers #{reason}, so loading <a href="//devdocs.io">devdocs.io</a> offline won't work.<br>
        The current tab will continue to function even when you go offline (provided you installed all the documentations beforehand). """

app.templates.offlineDoc = (doc, status) ->
  outdated = doc.isOutdated(status)

  html = """
    <tr data-slug="#{doc.slug}"#{if outdated then ' class="_highlight"' else ''}>
      <td class="_docs-name _icon-#{doc.icon}">#{doc.fullName}</td>
      <td class="_docs-size">#{Math.ceil(doc.db_size / 100000) / 10}&nbsp;<small>MB</small></td>
  """

  html += if !(status and status.installed)
    """
      <td>-</td>
      <td><button type="button" class="_btn-link" data-action="install">Install</button></td>
    """
  else if outdated
    """
      <td><strong>Outdated</strong></td>
      <td><button type="button" class="_btn-link _bold" data-action="update">Update</button> - <button type="button" class="_btn-link" data-action="uninstall">Uninstall</button></td>
    """
  else
    """
      <td>Up&#8209;to&#8209;date</td>
      <td><button type="button" class="_btn-link" data-action="uninstall">Uninstall</button></td>
    """

  html + '</tr>'