enable radio buttons to be unchecked both vanilla and jQuery

uncheckable-radio.js

// iterate using Array method for compatibility
Array.prototype.forEach.call(document.querySelectorAll('[type=radio]'), function(radio) {
	radio.addEventListener('click', function(){
		var self = this;
		// get all elements with same name but itself and mark them unchecked
		Array.prototype.filter.call(document.getElementsByName(this.name), function(filterEl) {
			return self !== filterEl;
		}).forEach(function(otherEl) {
			delete otherEl.dataset.check
		})

		// set state based on previous one
		if (this.dataset.hasOwnProperty('check')) {
			this.checked = false
			delete this.dataset.check
		} else {
			this.dataset.check = ''
		}
	}, false)
})