JSFiddle - React, Tailwind, and code Playground

by Sunny Sharma

HTML

<input id="name" />
<div class="msg"></div>

JavaScript

$('#name').on('keydown',function(e){
    $('.msg').text('');
    var $name = $(this).val();
    if(e.keyCode==32 & $name[$name.length-1]==' ')
    {
        $('.msg').text('Multiple spaces not allowed!');
        return false;
    }
});