Usage outside classes

[Kasper Lewau]

Sometimes I'll find myself wiring up a singleton for use throughout my application. Said singleton is really just an object with a set of exposed methods.

Some of these methods modify the exposed singleton through Object.assign. Now, I don't want to pollute my codebase with references to this, as such autobind comes to mind as I use it throughout my classes.

export default function Lab () {
  function meth () {
    const recipe = { 'acetone', 'lithium', 'sulfuric acid' };
    Object.assign(this, { recipe });
  }

  Object.assign(this, { meth });
}

Now, the exposed method can be prebound with .bind just fine;

export default function Lab () {
  Object.assign(this, {
    meth: meth.bind(this)
  });
}

But if I wan't to call it before exposure (insert w/e reason);

export default function Lab () {
  function meth () { /**/ }

  meth.call(this);

  Object.assign(this, {
    meth: meth.bind(this)
  });
}

I'd much rather have:

import autobind from 'autobind-decorator';

export default function Lab () {
  @autobind
  function meth () { /**/ }

  Object.assign(this, { meth });
}

I have no clue as to how hard this would be to implement, nor if it would ever work. Thoughts?

[Steve Mao]

Decorators don't modify the original function or class. Please checkout the spec. You could use autobind as a higher order function/class in your case.