onion-mapper is a flexible and powerful tool for object mapping in JavaScript and TypeScript, supporting simple mapping, deep mapping, and mapping through composition.
Install onion-mapper using npm:
npm i --save onion-mapperonion-mapper offers the following features:
Simple mapping allows you to easily transform one object into another by copying or transforming its properties.
const mapper = new UserMapper<User, TargeetUser>({
name: 'firstName',
fullName: (user) => `${user.firstName} ${user.lastName}`
});
const target = mapper.execute(sourceObject);Deep mapping supports the mapping of nested objects and allows the construction of complex data structures.
const addressMapper = new AddressMapper<Address, TargetAddress>({
fullAddress: (address) => `${address.city}, ${address.street}, ${address.appartment}`
})
const mapper = new UserMapper<User, TargetUser>({
name: 'firstName',
addressStreet: 'address.street',
addressCity: 'address.city',
});
const target = mapper.execute(sourceObject);Mapping with composition allows combining multiple mappers to create complex data transformations.
const addressMapper = new AddressMapper<Address, TargetAddress>({
fullAddress: (address) => `${address.city}, ${address.street}, ${address.appartment}`
})
const mapper = new UserMapper<User, TargetUser>({
name: 'firstName',
address: addressMapper,
});
const target = mapper.execute(sourceObject);onion-mapper is distributed under the MIT license. See the LICENSE file in the root directory of the project for more information.