JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" id='name' />
<input type='submit' id='submit' />
JavaScript
var btn = document.getElementById('submit');
btn.addEventListener('click', x, false);
function x() {
var name = document.getElementById('name').value;
var nameRegex = /^[-\sa-zA-Z]+$/;
if (name.match(nameRegex)) {
alert('true');
}
else {
alert('false');
}
}