explicit-inject.js

const getFrom = container => prop => container[prop];

const createInstance = (factory, deps) =>
  deps.some(isPromise) 
    ? Promise.all(deps).then(resolvedDeps => factory(...resolvedDeps))
    : factory(...deps);

export const asFactory = factory => container =>
  Array.isArray(factory.inject)
    ? createInstance(factory, factory.inject.map(getFrom(container)))
    : factory(container);
 
export const asClass = constructor => asFactory(
  (...args) => Reflect.construct(contructor, args)
);