Transform a stream of DOMEvents to the values they represent (in the case of inputs).
var events = require('dom-event-stream')
, values = require('dom-value-stream')
events(document.querySelector('#source'), 'keyup')
.pipe(values())
.pipe(output())
Returns a transform stream that translates DOMEvents
into values over time (it looks at ev.target.value).
If ev.target.value is null or undefined, placeholder
is emitted instead. This will be an empty string if not
given as a parameter.
MIT