JSFiddle - React, Tailwind, and code Playground

by Alfie

HTML

<input value="testing" />
<input/>
<input value="testing" />
<input/>
<input/>
<input/>
<button>test</button>

JavaScript

$('button').on('click', function () {
    var emptyCnt = 0;
    $('input').each(function () {
        if (this.value.length == 0) {
            emptyCnt++;
        }
    });
    alert(emptyCnt);
});