JSFiddle - React, Tailwind, and code Playground
HTML
<input id="input" type="number" value="" />JavaScript
val = $('#input').val();
//val = isNaN( val ) ? 'blurg' :
if( isNaN( '' ) ) {
val = 'blurgh';
console.log('NaN');
} else {
val = parseInt( val );
console.log(' is a number?');
}
alert(val);