Callbag operator version of callback-merge. Useful for example when you want to merge the current source with other(s) in the middle of a pipe.
npm install callbag-merge-with
const fromEvent = require('callbag-from-event');
const pipe = require('callbag-pipe');
const filter = require('callbag-filter');
const mergeWith = require('callbag-merge-with');
const mapTo = require('callbag-map-to');
const submitActions = pipe(
fromEvent(inputNode, 'keyup'),
filter(e => e.key === 'Enter'),
mergeWith(fromEvent(submitBtn, 'click')),
mapTo({type: 'submit'})
);