JSFiddle - React, Tailwind, and code Playground

HTML

<div class="row">
<input type="text" class="input input1" />
<input type="text" class="input input2" />
<input type="text" class="input input2" />
</div>

<div class="row">
<input type="text" class="input input1" />
<input type="text" class="input input2" />
<input type="text" class="input input2" />
</div>

JavaScript

$('.input').keyup(function () {

	var field = $(this).parent().children('.input');
	var count = 0;

	$(field).each(function (i) {
		var len = $(field).val().length;		
		if (len > 0 ) {
			count++;
		}
	});
  
  alert(count);

});