JSFiddle - React, Tailwind, and code Playground

HTML

<button id="increase">Increase</button><button id="decrease">Decrease</button>
<span id="counter">0</span>

JavaScript

$(increase).click(function(){
    var count = +$("#counter").text() + 1;
    history.pushState({count:count});
    $(counter).text(count);
})
$(decrease).click(function(){
    var count = +$("#counter").text() - 1;
    history.pushState({count:count});
    $(counter).text(count);
})
$(window).on("popstate",function(e){
    console.log(e);
    if (e.originalEvent.state) {
        $(counter).text(e.originalEvent.state.count);  
    }
    else {
        // set to default
        $(counter).text("0");
    }
})