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diff --git a/addons/website_event_track/static/lib/idb-keyval/idb-keyval.js b/addons/website_event_track/static/lib/idb-keyval/idb-keyval.js
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+//     idb-keyval.js 3.2.0
+//     https://github.com/jakearchibald/idb-keyval
+//     Copyright 2016, Jake Archibald
+//     Licensed under the Apache License, Version 2.0
+
+var idbKeyval = (function (exports) {
+    'use strict';
+    
+    class Store {
+        constructor(dbName = 'keyval-store', storeName = 'keyval') {
+            this.storeName = storeName;
+            this._dbp = new Promise((resolve, reject) => {
+                const openreq = indexedDB.open(dbName, 1);
+                openreq.onerror = () => reject(openreq.error);
+                openreq.onsuccess = () => resolve(openreq.result);
+                // First time setup: create an empty object store
+                openreq.onupgradeneeded = () => {
+                    openreq.result.createObjectStore(storeName);
+                };
+            });
+        }
+        _withIDBStore(type, callback) {
+            return this._dbp.then(db => new Promise((resolve, reject) => {
+                const transaction = db.transaction(this.storeName, type);
+                transaction.oncomplete = () => resolve();
+                transaction.onabort = transaction.onerror = () => reject(transaction.error);
+                callback(transaction.objectStore(this.storeName));
+            }));
+        }
+    }
+    let store;
+    function getDefaultStore() {
+        if (!store)
+            store = new Store();
+        return store;
+    }
+    function get(key, store = getDefaultStore()) {
+        let req;
+        return store._withIDBStore('readonly', store => {
+            req = store.get(key);
+        }).then(() => req.result);
+    }
+    function set(key, value, store = getDefaultStore()) {
+        return store._withIDBStore('readwrite', store => {
+            store.put(value, key);
+        });
+    }
+    function del(key, store = getDefaultStore()) {
+        return store._withIDBStore('readwrite', store => {
+            store.delete(key);
+        });
+    }
+    function clear(store = getDefaultStore()) {
+        return store._withIDBStore('readwrite', store => {
+            store.clear();
+        });
+    }
+    function keys(store = getDefaultStore()) {
+        const keys = [];
+        return store._withIDBStore('readonly', store => {
+            // This would be store.getAllKeys(), but it isn't supported by Edge or Safari.
+            // And openKeyCursor isn't supported by Safari.
+            (store.openKeyCursor || store.openCursor).call(store).onsuccess = function () {
+                if (!this.result)
+                    return;
+                keys.push(this.result.key);
+                this.result.continue();
+            };
+        }).then(() => keys);
+    }
+    
+    exports.Store = Store;
+    exports.get = get;
+    exports.set = set;
+    exports.del = del;
+    exports.clear = clear;
+    exports.keys = keys;
+    
+    return exports;
+    
+    }({}));