What is an object store in IndexedDB?

Question

ICSM Computer · Answer

In IndexedDB, an object store is like a 
table in a relational database. It’s where the actual data records (objects) are stored.
What is an Object Store?
An object store:
Holds JavaScript objects (not strings like localStorage).Has a key for each record, used to identify and retrieve data.Can have indexes for fast searching/filtering on object properties.
Example
Structure
Suppose you have this object:
{ id: 1, name: "Alice", age: 25 }
You can store it in an object store named "users" with "id" as the key.
Creating an Object Store (in onupgradeneeded)
const request = indexedDB.open('MyDB', 1);
request.onupgradeneeded = (event) =andgt; {
    const db = event.target.result;
    // Create an object store named "users" with keyPath "id"
    const store = db.createObjectStore('users', { keyPath: 'id' });
    // Optionally create an index on 'name'
    store.createIndex('nameIndex', 'name', { unique: false });
};
Inserting into the Object Store
const tx = db.transaction('users', 'readwrite');
const store = tx.objectStore('users');
store.add({ id: 1, name: "Alice", age: 25 });
Key Characteristics
Feature
Description
KeyPath
A property (e.g. 'id') used as a unique key for each record
Auto-increment
Can auto-generate numeric keys if desired
Indexable
Can create indexes on any field for fast lookups
Stores objects
Holds whole JS objects, not just strings
Multiple stores
A single database can have multiple object stores (like tables)
Summary
An object store is where data lives inside an IndexedDB database.It’s similar to a table, but stores objects with unique keys.You can create indexes to speed up lookups by object properties.

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What is an object store in IndexedDB?

ICSM Computer

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1 Answers

What is an Object Store?

Example

Structure

Creating an Object Store (in `onupgradeneeded`)

Inserting into the Object Store

Key Characteristics

Summary

Liked By

Feature	Description
KeyPath	A property (e.g. `'id'`) used as a unique key for each record
Auto-increment	Can auto-generate numeric keys if desired
Indexable	Can create indexes on any field for fast lookups
Stores objects	Holds whole JS objects, not just strings
Multiple stores	A single database can have multiple object stores (like tables)