[blog] - small snippet for http://davidl.fr/blog/site-web-obese.html

cache-localStorage.html

<-- Script tag that will hold jQuery -->
<script id="js-jquery"></script>

<-- Determine if jQuery should be loaded from localStorage or the server -->
<script>
  var jqFile;
  if ('jqFile' in window.localStorage) {
    // 1. The script is already stored
    jqFile = window.localStorage.getItem('jqFile'); 
  } else {
    // 2. not present, AJAX request to get the data
    jqFile = getJQFile();
    // push the data into localStorage
    window.localStorage.setItem('jqFile',jqFile);
  }
  // 3. Insert JavaScript into the script element
  document.getElementById('js-jquery').text = jqFile;
</script>