electerious

const counter = (min, max, initial) => {

	let index  = initial - min
	let length = max - min + 1

	return (modifier = 0) => {

		index = (index + modifier) % length
		
		if (index>=0) index = 0 + index

electerious

const toggler = (initState) => {

	initState = initState!==false

	let state = initState
		
	return {
		get    : () => state,
		reset  : () => state = initState,
		toggle : () => state = !state,

electerious

const select = (query, elem = null) => {

	elem = (elem==null ? document : elem)

	let elems = elem.querySelectorAll(query)

	if (elems==null) return []
	else             return Array.prototype.slice.call(elems, 0)

}

electerious

const debounce = function(fn, duration) {

	let timeout = null

	return (...args) => {

		clearTimeout(timeout)

		timeout = setTimeout(() => fn(...args), duration)

electerious

const hasTouchscreen = () => {

	const mobileDevice = (/Android|iPhone|iPad|iPod/i).test(navigator.userAgent || navigator.vendor || window.opera)
	const onTouchEnd   = ('ontouchend' in document.documentElement)

	return (mobileDevice && onTouchEnd)

}

electerious

const nicetry = (fn) => {
	
	try { return fn() }
	catch (e) {}
	
}

electerious

const decodeHTML = (str) => {

	const elem = document.createElement('div')

	elem.innerHTML = str

	return (elem.childNodes.length===0 ? '' : elem.childNodes[0].nodeValue)

}

electerious

const hasLocalStorage = () => {

	const tmp = 'tmp'

	try {

		localStorage.setItem(tmp, tmp)
		localStorage.removeItem(tmp)

		return true

electerious

mime {
    .atom application/atom+xml
    .json application/json
    .map application/json
    .topojson application/json
    .jsonld application/ld+json
    .rss application/rss+xml
    .geojson application/vnd.geo+json
    .rdf application/xml
    .xml application/xml

electerious

const formatNumber = (num, delimiter = ',') => num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, delimiter)