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title category layout
applicationCache
JavaScript
2017/sheet

Reference

{: .-one-column}

applicationCache checking

if (window.applicationCache) {
  // "Naturally" reload when an update is available
  var reload = false

  window.applicationCache.addEventListener('updateready', () => {
    if (window.applicationCache.status === window.applicationCache.UPDATEREADY) {
      window.applicationCache.swapCache()
      reload = true
    }
  }, false)

  setInterval(() => {
    try {
      // There's nothing to update for first-time load, browser freaks out :/
      window.applicationCache.update()
    } catch (e) { }
  }, 1000 * 60 * 60) // Every hour
}

This is a deprecated HTML feature. See: Using the application cache (developer.mozilla.org)

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