JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper-right-block">
    <div id='sideBar' class='bar floatingTop'></div>
</div>
<div class="wrapper-right-block">
    <div id='sideBar2' class='bar floatingTop'></div>
</div>

CSS

html, body{
    border:0; margin:0; padding:0;
    min-height:1000px;
}

#container{
    height:2000px;
    width:100%;
    float:left;
    border:0; padding:0; margin:0;
}

.wrapper-right-block{
    height:1000px;
}

.bar {
    width:50px;
    height:200px;
    background:#d22;
}

.floatingTop{
    position:static;
    margin:100px 10px;
}
.floatingBottom{
    position:static;
    margin: 0px 10px;
    padding-top: 890px;
}
.fixed{
    position:fixed;
    top:10px; left:10px;
}

JavaScript

$(window).scroll(function(){
    if($(window).scrollTop() <= '90'){
        $('#sideBar').addClass('floatingTop');
        $('#sideBar').removeClass('fixed');        
    }else{
        if($(window).scrollTop() <= '880'){
            $('#sideBar').removeClass('floatingTop');
            $('#sideBar').removeClass('floatingBottom');
            $('#sideBar').addClass('fixed');
        }else{
            $('#sideBar').addClass('floatingBottom');
            $('#sideBar').removeClass('fixed');
        }
    }
    
    if($(window).scrollTop() <= '1090'){
        $('#sideBar2').addClass('floatingTop');
        $('#sideBar2').removeClass('fixed');        
    }else{
        if($(window).scrollTop() <= '1970'){
            $('#sideBar2').removeClass('floatingTop');
            $('#sideBar2').removeClass('floatingBottom');
            $('#sideBar2').addClass('fixed');
        }else{
            $('#sideBar2').addClass('floatingBottom');
            $('#sideBar2').removeClass('fixed');
        }
    }
});


$('.right-block.top').float();
$('.right-block.bottom').float();