JSFiddle - React, Tailwind, and code Playground
HTML
<input value="default">
<button>get value</button>
JavaScript
var $input = $('input');
$('button').click(function() {
console.log( 'val: ', $input.val() );
console.log( 'prop: ', $input.prop('value') );
console.log( 'attr: ', $input.attr('value') );
});