JSFiddle - React, Tailwind, and code Playground

HTML

<div id="form">
    <form>
        <input type="text" name="one" class="master">
        <input type="text" name="two" class="master">
        <input type="text" name="three" class="master">
        <input type="text" name="four" class="slave">
        <input type="text" name="five" class="slave">
    </form>
</div>
<div class="disappear">
    Some text appears here
</div>

JavaScript

$('.disappear').hide();
$('.master').change(function() {
    if ($('.master').filter(function() {
        return !this.value;
    }).length) {
        // some are empty
        $('.disappear').hide();
    } else {
        // none are empty
        $('.disappear').show();
    }
});