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@hemia/autobind

v0.0.1

Published

A lightweight utility for automatic method binding in classes

Readme

@hemia/autobind

Decoradores de autobind para TypeScript.

Este paquete proporciona tres decoradores para enlazar automáticamente métodos de clases a su instancia, asegurando que el contexto de this siempre apunte correctamente. Ideal para evitar errores comunes cuando se pasan funciones como callbacks.

Características

  • @BoundMethod: memoriza y enlaza el método a su instancia.
  • @BoundClass: enlaza automáticamente todos los métodos de la clase.
  • @Autobind: funciona como @BoundMethod o @BoundClass según su uso.

Instalación

npm install @hemia/autobind

Asegúrate de habilitar experimentalDecorators en tu tsconfig.json:

{
  "compilerOptions": {
    "experimentalDecorators": true,
    "target": "ES6",
    "module": "commonjs"
  }
}

Uso básico

Importación

import { BoundMethod, BoundClass, Autobind } from '@hemia/autobind';

@BoundMethod

class MiClase {
  private contador: number = 0;

  @BoundMethod
  incrementar() {
    this.contador++;
    console.log(`Contador: ${this.contador}`);
  }
}

const instancia = new MiClase();
const fn = instancia.incrementar;
fn(); // Contador: 1
fn(); // Contador: 2

@BoundClass

@BoundClass
class MiClaseAuto {
  private contador: number = 0;

  incrementar() {
    this.contador++;
    console.log(`Contador: ${this.contador}`);
  }

  decrementar() {
    this.contador--;
    console.log(`Contador: ${this.contador}`);
  }
}

const instancia = new MiClaseAuto();
const inc = instancia.incrementar;
const dec = instancia.decrementar;
inc(); // Contador: 1
dec(); // Contador: 0

@Autobind como decorador universal

Decorando un método:

class OtraClase {
  constructor(private nombre: string) {}

  @Autobind
  saludar() {
    console.log(`Hola, soy ${this.nombre}`);
  }
}

const instancia = new OtraClase('Decorador');
const fn = instancia.saludar;
fn(); // Hola, soy Decorador

Decorando una clase:

@Autobind
class ClaseCompleta {
  private valor = 10;

  metodo1() {
    console.log('Metodo 1:', this.valor);
  }

  metodo2() {
    console.log('Metodo 2:', this.valor);
  }
}

const instancia = new ClaseCompleta();
instancia.metodo1();
instancia.metodo2();

Funcionamiento interno

  • @BoundMethod crea un getter que memoriza el this enlazado al primer acceso.
  • @BoundClass aplica @BoundMethod a todos los métodos del prototipo.
  • @Autobind detecta si se usa sobre clase o método, y aplica el decorador correspondiente.

Contribuciones

  1. Haz un fork del repositorio.
  2. Crea una rama con tu funcionalidad: git checkout -b feature/nueva-funcionalidad.
  3. Aplica tus cambios con commits descriptivos.
  4. Abre un pull request.

Licencia

MIT License — Hemia Technologies