TypeORM is an [ORM](https://en.wikipedia.org/wiki/Object-relational_mapping) that can run in Node.js, Browser, Cordova, Ionic, React Native, NativeScript, Expo, and Electron platforms and can be used with TypeScript and JavaScript (ES2023). Its goal is to always support the latest JavaScript features and provide additional features that help you to develop any kind of application that uses databases - from small applications with a few tables to large-scale enterprise applications with multiple databases.

TypeORM is highly influenced by other ORMs, such as [Hibernate](http://hibernate.org/orm/), [Doctrine](http://www.doctrine-project.org/) and [Entity Framework](https://www.asp.net/entity-framework).

## Highlights

- Supports both DataMapper and ActiveRecord patterns, giving you the flexibility to choose what works best for your project.

- Built from the ground up with TypeScript support, providing complete type safety for your database models.

- TypeORM supports more databases than any other JS/TS ORM: Google Spanner, Microsoft SqlServer, MySQL/MariaDB, MongoDB, Oracle, Postgres, SAP HANA and SQLite, as well as derived databases and different drivers.

- Elegant syntax for building complex queries with joins, pagination, and caching.

- First-class support for database migrations with automatic generation.

- Works in Node.js, browsers, mobile, and desktop applications.

## Features

- Entities and columns.

- Database-specific column types.

- Entity manager.

- Repositories and custom repositories.

- Clean object-relational model.

- Associations (relations).

- Eager and lazy relations.

- Transactions.

- Migrations and automatic migrations generation.

- Connection pooling.

- Replication.

- Cross-database and cross-schema queries.

- Elegant-syntax, flexible and powerful QueryBuilder.

- Left and inner joins.

- Proper pagination for queries using joins.

- Query caching.

- Logging.

- Listeners and subscribers (hooks).