Callbag operator that emits only the first value emitted by the source Callbag that meets some condition given a predicate function. Works for listenable and pullable sources.
npm install callbag-find
const find = require('callbag-find');
const subscribe = require('callbag-subscribe');
const fromIter = require('callbag-from-iter');
const pipe = require('callbag-pipe');
pipe(
fromIter([1, 3, 5, 7, 2, 4, 6, 8]),
find(n => n % 2 === 0),
subscribe({
next: (v) => console.log('=> ', v),
complete: () => console.log('=> done')
}) // => 2
); // => doneconst find = require('callbag-find');
const subscribe = require('callbag-subscribe');
const fromEvent = require('callbag-from-event');
const pipe = require('callbag-pipe');
pipe(
fromEvent(document, 'click'),
find(ev => ev.target.tagName === 'DIV'),
subscribe({
next: (v) => console.log('=> ', v),
complete: () => console.log('=> done')
})
);