JSFiddle - React, Tailwind, and code Playground

by MD RAHMAN

HTML

<input type="text" id="username" onkeyup="getLength()">
<input type="submit" id="test">

JavaScript

function getLength() {
var summonerid = document.getElementById("username").value.length;
return summonerid;
}

function lengthCheck() {
   var getLengthValue = getLength();
   if(getLengthValue == 4) {
     alert("come on");
   } else {
     alert("wai");  
	}
}

var button = document.getElementById("test");
button.addEventListener('click', lengthCheck, false);