JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text">
<br/>
<input type="text" class="textInput">

JavaScript

$(document).ready(function() {
    $(document).keydown(function(e) {
        var elid = $(document.activeElement).hasClass('textInput');
       console.log(e.keyCode + ' && ' + elid);
        if (e.keyCode === 8 && !elid) {
            return false;
        };
    });
});