Найти элементы на странице и взять их value jquery

document.addEventListener('DOMContentLoaded', function () {
    let div = document.querySelector('div').children;
    [...div].forEach(function (c) {
        console.log(c.value);
    })
})

<div>
    <input type="hidden" value="1">
    <input type="hidden" value="2">
    <input type="hidden" value="3">
</div>

	var item = $("input[type='hidden']");
	item.each(function(){
	console.log($(this).attr('value'));
	});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="hidden" value='1'>
<input type="hidden" value='2'>
<input type="hidden" value='3'>

$('div input').each(function() {
  console.log($(this).val());
});

<script src="https://code.jquery.com/jquery-2.2.4.js"></script>


<div>
  <input type="hidden" value="1">
  <input type="hidden" value="2">
  <input type="hidden" value="3">
</div>