JSFiddle - React, Tailwind, and code Playground
by darioferrer
HTML
<form method="post" action="" onsubmit="return something();">
<input type="number" id="endNo" name="endNo" placeholder="END" min="5" max="20">
<input type="submit" name="name" value="REGISTER" onclick="this.disabled=true;">
</form>
JavaScript
function something() {
var v = document.getElementById( "endNo" ).value;
alert( "The value is " + v );
return false;
}