LazyInject

@tsed/di

Usage

import { LazyInject } from "@tsed/di";

See /packages/di/src/common/decorators/lazyInject.ts.

Overview

function LazyInject(resolver: () => Promise<{
    default: unknown;
}>): PropertyDecorator;
export function LazyInject(key: string, resolver: () => Promise<{
    default: unknown;
}>): PropertyDecorator;

Description

Lazily inject a provider from a dynamic import.

Defers loading and injection of a provider until the property is first accessed. Useful for code splitting, optional dependencies, or reducing initial bundle size.

Usage

import type {PlatformException} from "@tsed/platform-exceptions";
import {Injectable, LazyInject} from "@tsed/di";

@Injectable()
export class MyService {
  // Import default export
  @LazyInject(() => import("@tsed/platform-exceptions"))
  exceptions: Promise<PlatformException>;

  // Import named export
  @LazyInject("MyPlugin", () => import("./plugins"))
  plugin: Promise<MyPlugin>;

  async handleError(error: Error) {
    const handler = await this.exceptions;
    handler.handle(error);
  }
}

default

default: unknown;

default

default: unknown;