If you need to wait for an object property to be defined and other message passing just won't do it for you, this is your module. That said using deferred-definition is an extreme measure. There is almost definitely a more sensible async/await/event loop solution for your problem out there. Also, this module relies on Proxies, which will break most transpilation to ES5 since Babel does not support them.
# as a npm module (recommended)
npm install [...options] deferred-definition
installation via the git repo url is also possible; see https://docs.npmjs.com/cli/install,
git subtree --help, and
git submodule --help
const assert = require('assert');
const {deferrable} = require('../src/index.js');
const deferred = deferrable({});
assert(deferred.property instanceof Promise);
deferred.property.then((property)=>{assert(property);});
deferred.property = true;
refOne.then(assert);
Please do.
If you decide to contribute, please to lint, test, and document your code.