[j0hnik]

<div class="el">1</div>
	<div class="el">3</div>
	<div class="el">4</div>
	<div class="el">5</div>
	<div class="el">6</div>
	<script>

		var div = document.querySelectorAll('div');
		var x;
		div.forEach(el => el.onmouseenter = e =>{
			x = el;
			console.log([].filter.call(div, el=> el != x));
		} );


	</script>