Function: defer()

defer<A, R>(factory): (...dependencies) => Promise<Awaited<R>>

Defined in: src/utils/defer.ts:22

Wraps a factory so it accepts promises for any of its arguments: they are awaited before the factory runs, and the wrapped factory returns a promise. Use it to register services that depend on async services in a synchronous container.

Type Parameters

A

A extends unknown[]

R

R

Parameters

factory

((...args) => R) | (new (...args) => R)

Returns

(...dependencies) => Promise<Awaited<R>>

Example

app
  .addSingleton('config', () => fetchConfig()) // Promise<Config>
  .addSingleton('db', defer((config: Config) => connect(config.dbUrl)), ['config']);

const db = await app.get('db');