JSFiddle - React, Tailwind, and code Playground

HTML

<div class="list1">
    <div class="left">л1</div>
</div>
<div class="list2">
    <div class="right">п2</div>
</div>
<div class="list3">
    <div class="left">л3</div>
</div>
<div class="list4">
    <div class="right">п4</div>
</div>
<div class="list5">
    <div class="left">л5</div>
</div>
<div class="list6">
    <div class="right">п6</div>
</div>

CSS

.right {float:right;margin-top:20px;}
.left {float:left;margin-top:20px;}
.list1 {display:none;}
.list2 {display:none;}
.list3 {display:none;}
.list4 {display:none;}
.list5 {display:none;}
.list6 {display:none;}

JavaScript

var crntnumL = 1;
var crntnumR = 2;
var r_href = ".list"+crntnumR+" .right";
var l_href = ".list"+crntnumL+" .left";
alert (r_href);
$(".list"+crntnumL).css("display","block");
$(".list"+crntnumR).css("display","block");
$(r_href).click(function ()
                {
                    $(".list"+crntnumL).css("display","none");
                    $(".list"+crntnumR).css("display","none");
                    crntnumL = crntnumL+2;
                    crntnumR = crntnumR+2;
                    r_href = ".list"+crntnumR+" .right";
                    l_href = ".list"+crntnumL+" .left";
                    $(".list"+crntnumL).css("display","block");
                    $(".list"+crntnumR).css("display","block");
                    console.log (r_href);
                    
                    
                });
$(l_href).click(function ()
                {
                    $(".list"+crntnumL).css("display","none");
                    $(".list"+crntnumR).css("display","none");
                    crntnumL = crntnumL-2;
                    crntnumR = crntnumR-2;
                    r_href = ".list"+crntnumR+" .right";
                    l_href = ".list"+crntnumL+" .left";
                    $(".list"+crntnumL).css("display","block");
                    $(".list"+crntnumR).css("display","block");
                    alert (r_href+"   "+l_href);
                    
                });