Implementing IndexedDB

2 - Fetch the stats.js

/** Fetch all of the stats from the datastore **/
mkDB.fetchStats = function(callback, user = "All") {
    var db = datastore;
    var tx = db.transaction("stats", "readonly");
    var store = tx.objectStore("stats");

    //Get only certain user data if specified
    if (user === "All") {
        var request = store.openCursor(IDBKeyRange.lowerBound(0));
    } else {
        var index = store.index("by_user");
        var request = index.openCursor(IDBKeyRange.only(user));
    }
  
    // Storing loaded stats
    var stats = [];
    
    request.onsuccess = function() {
        var rec = request.result;
        if (rec) {
            // Called for each matching record.
            stats.push(rec.value);
            rec.continue();
        }
    };
    
    tx.oncomplete = function() {
        callback(stats);
    };
    
    // Error handling
    request.onerror = mkDB.onerror;
};