callbag-from-promise
Convert a Promise to a callbag listenable source.
npm install callbag-from-promise
example
const fromPromise = require('callbag-from-promise');
const observe = require('callbag-observe');
const source = fromPromise(
fetch('http://jsonplaceholder.typicode.com/users/1')
.then(res => res.json())
);
observe(user => console.log(user.name))(source); // Leanne Graham