IDBDatabase

// Let us open our database const DBOpenRequest = window.indexedDB.open("toDoList", 4); // these two event handlers act on the IDBDatabase object, // when the database is opened successfully, or not DBOpenRequest.onerror = (event) => { note.appendChild(document.createElement("li")).textContent = "Error loading database."; }; DBOpenRequest.onsuccess = (event) => { node.appendChild(document.createElement("li")).textContent = "Database initialized."; // store the result of opening the database in the db // variable. This is used a lot later on db = DBOpenRequest.result; // Run the displayData() function to populate the task // list with all the to-do list data already in the IDB displayData(); }; // This event handles the event whereby a new version of // the database needs to be created Either one has not // been created before, or a new version number has been // submitted via the window.indexedDB.open line above DBOpenRequest.onupgradeneeded = (event) => { const db = event.target.result; db.onerror = (event) => { note.appendChild(document.createElement("li")).textContent = "Error loading database."; }; // Create an objectStore for this database using // IDBDatabase.createObjectStore const objectStore = db.createObjectStore("toDoList", { keyPath: "taskTitle", }); // define what data items the objectStore will contain objectStore.createIndex("hours", "hours", { unique: false }); objectStore.createIndex("minutes", "minutes", { unique: false }); objectStore.createIndex("day", "day", { unique: false }); objectStore.createIndex("month", "month", { unique: false }); objectStore.createIndex("year", "year", { unique: false }); objectStore.createIndex("notified", "notified", { unique: false }); note.appendChild(document.createElement("li")).textContent = "Object store created."; }; 

const objectStore = db .transaction("toDoList", "readwrite") .objectStore("toDoList");