examples/index2.html

<!doctype html>
<html>
  <head>
    <meta charset="utf8" />
    <title>Simple localForage-getItems example</title>
  </head>
  <body>
    <script src="../node_modules/localforage/dist/localforage.js"></script>
    <script src="../dist/localforage-getitems.js"></script>
    <script>
      var driverTestOrder = [
        localforage.INDEXEDDB,
        localforage.WEBSQL,
        localforage.LOCALSTORAGE
      ];

      var n = 100;
      var take = 10;

      function getRandomKeys() {
        var keys = [];
        for (var i = 0; i < take; i++) {
          var key = ((Math.random() * n) | 0) + 'key';
          keys.push(key);
        }
        return keys;
      }
    
      var itemKeys = getRandomKeys();

      function initDb() {
        var initPromise = localforage.setDriver(driverTestOrder).then(function() {
          return localforage.clear();
        }).then(function() {
          var totalKeyValues = [];
          for (var i = 0; i < n; i++) {
            var key = i + 'key';
            var value = ((Math.random() * n) | 0) + 'value';
            totalKeyValues.push([key, value]);
          }

          var totalKeyValuesPromises = totalKeyValues.map(function(x) {
            return localforage.setItem(x[0], x[1]);
          });

          var promiseAll = Promise.all(totalKeyValuesPromises);
          return promiseAll;
        });
        return initPromise;
      }

      var initT0 = performance.now();

      initDb().then(function(){
        var initT1 = performance.now();
        console.log('Init Finished after ' + (initT1 - initT0) + ' milliseconds.');

        var driver = localforage.driver();
        
        Promise.resolve().then(function(){
          var t0 = performance.now();
          return localforage.getItems(itemKeys).then(function(results){
            console.log('getItems', results);
            var t1 = performance.now();
            console.log('Completed ' + driver + ' after ' + (t1 - t0) + ' milliseconds.');
          });
        }).then(function(){
          if (localforage.driver() !== localforage.LOCALSTORAGE) {
            var t0g = performance.now();

            localforage.getItems.generic.call(localforage, itemKeys).then(function(results){
              console.log('getItemsGeneric', results);
              var t1g = performance.now();
              console.log('Completed Generic after ' + (t1g - t0g) + ' milliseconds.');
            });
          }
        });
      });

    </script>

    <p>
      Check your console log.
    </p>
  </body>
</html>