nanotask 
Microtask queue scheduler for the browser. Falls back to
window.requestAnimationFrame in environments that don't allow
MutationObserver based scheduling.
The microtask queue is a set of tasks that runs at the end of the current frame
in the browser, before recalculating style and painting. This is analogous to
process.nextTick() in Node. There's no direct API for the microtask queue in
the browser, but using document.MutationObserver we can trick the browser
into running functions as part of the microtask queue. This is useful to create
tight, 60fps loops in the main browser thread.
Usage
var nanotask = require('nanotask')
var queue = nanotask()
queue(function () {
console.log('resolved at the start of the next frame')
})API
queue = nanotask()
Create a new Nanotask instance.
queue(fn)
Queue a function on the browser's microtask queue.
Installation
$ npm i nanotask