electerious

escapeHTML = (html = '') => {

	// Ensure that html is a string
	html += ''

	// Escape all critical characters
	html = html.replace(/&/g, '&')
	           .replace(/</g, '&lt;')
	           .replace(/>/g, '&gt;')
	           .replace(/"/g, '&quot;')

electerious

const closest = (elem, className) => {

	if (elem==null || elem.classList==null) return null

	return (elem.classList.contains(className) ? elem : closest(elem.parentNode, className))

}

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

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

electerious

const toClassString = (obj) => Object.keys(obj).filter((key) => obj[key]===true).join(' ').trim()

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 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 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