How do you add data to an object store in IndexedDB?

To add data to an object store in IndexedDB, you typically perform this operation within a transaction. Here's a step-by-step guide on how to add data to an object store:

// Step 1: Open or create a database
var request = indexedDB.open("myDatabase", 1);

// Step 2: Handle the database events
request.onerror = function(event) {
    // Handle errors
    console.log("Error opening database");
};

request.onsuccess = function(event) {
    // Get reference to the opened database
    var db = event.target.result;
    console.log("Database opened successfully");
    
    // Step 3: Start a transaction
    var transaction = db.transaction(["myObjectStore"], "readwrite");

    // Step 4: Get the object store
    var objectStore = transaction.objectStore("myObjectStore");

    // Step 5: Add data to the object store
    var data = { id: 1, name: "John Doe", email: "john@example.com" };
    var addRequest = objectStore.add(data);

    // Step 6: Handle the result of the add operation
    addRequest.onsuccess = function(event) {
        console.log("Data added successfully");
    };

    addRequest.onerror = function(event) {
        console.log("Error adding data");
    };
};

// Step 7: Define the database structure in case of upgrade
request.onupgradeneeded = function(event) {
    // Get reference to the opened database
    var db = event.target.result;

    // Create an object store if it doesn't exist
    var objectStore = db.createObjectStore("myObjectStore", { keyPath: "id" });

    // Define indexes if needed
    objectStore.createIndex("name", "name", { unique: false });
    objectStore.createIndex("email", "email", { unique: true });
};?

Explanation :

* Open or create a database using indexedDB.open("myDatabase", 1).

* Handle database events such as error and success.

* Start a transaction with the object store you want to add data to. In this case, we use "myObjectStore".

* Get a reference to the object store within the transaction using transaction.objectStore("myObjectStore").

* Prepare the data you want to add to the object store. This can be in the form of a JavaScript object.

* Use the add() method on the object store to add the data. The add() method takes the data as a parameter.

* Handle the result of the add operation using onsuccess and onerror event handlers.

* Optionally, define the database structure within the onupgradeneeded event handler.