JSFiddle - React, Tailwind, and code Playground

HTML

<button id='klick'>klick</button>
<br>
<span id='output'></span>

JavaScript

var output;
var SASState = 0;
var buttonStatus = 0;

$( document ).ready(function() {
    output = $('#output').text('start');
    
    $('#klick').on('click',function(){
        if(buttonStatus == 0){
            buttonStatus = 1;
        }else{
            buttonStatus = 0;
        }
    });
    
    setInterval(function(){ loop(); }, 1000);
    
});

function loop(){
    output.html(output.html()+'<br>'+buttonStatus+' - '+SASState);
    if(buttonStatus != SASState){
        output.html(output.html()+'<br>'+'change status');
        SASState = buttonStatus;
    }
}