<!DOCTYPE html>

<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Pagination</title>
    <link rel="stylesheet" href="index.css">

    <style>
   
*{
    padding: 0px;
    margin: 0px;
}
body{
    width: 100%;
    height: 100vh;
    background: #943ec0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.box{
    background-color: #fff;
    padding: 10px;
    border-radius: 100px;
    box-shadow: 0px 10px 30px -15px #000;
    display: flex;
    align-items: center;
}
.box ul{
    display: flex;
    margin: 0px 10px;
}
.box ul li{
    list-style: none;
    margin: 0px 5px;
    width: 40px;
    height: 40px;
    line-height: 40px;
    border-radius: 100px;
    text-align: center;

}
.box ul li a{
    font-size: 25px;
    text-decoration: none;
    color: #000;
    display: block;
    border-radius: 100px;
    transition: 0.2s;
}
.box ul li .active_page{
    background-color: #a05acb;
    color: #fff;
}
.box ul li a:hover,
.box button a:hover{
    background-color: #a05acb;
    color: #fff;
}

/* ---------- Buttons ---------- */
.box button{
    font-size: 20px;
    font-weight: bold;
    background-color: #f1f1f1;
    border: none;
    cursor: pointer;
    border-radius: 100px;
    overflow: hidden;
}
.box button a{
    text-decoration: none;
    padding: 10px 20px;
    display: block;
    color: #000;
    transition: 0.2s;
}
</style>
</head>

<body>

    <div class="box">
        <button type="button" class="prev"><a href="#"><</a></button>

        <ul class="ul">
            <!-- <li><a href="#" class="page_number">1</a></li>
            <li><a href="#" class="page_number">2</a></li>
            <li><a href="#" class="page_number active_page">3</a></li>
            <li><a href="#" class="page_number">4</a></li>
            <li><a href="#" class="page_number">5</a></li> -->
        </ul>

        <button type="button" class="next"><a href="#">></a></button>
    </div>
<script>

    let ul = document.querySelector(".ul");
    let prev = document.querySelector(".prev");
    let next = document.querySelector(".next");
    let current_page = 6;
    let total_page = 100;
    let active_page = "";

    create_pages(current_page);

    function create_pages(current_page) {
        ul.innerHTML = "";

        let before_page = current_page - 2;
        let after_page = current_page + 6;

        if(current_page == 2){
            before_page = current_page - 1;
        }
        if(current_page == 1){
            before_page = current_page;
        }

        if(current_page == total_page - 1){
            after_page = current_page + 1;
        }
        if(current_page == total_page){
            after_page = current_page;
        }

        for (let i = before_page; i <= after_page; i++) {
            if (current_page == i) {
                active_page = "active_page";
            } else {
                active_page = "";

            }
            ul.innerHTML += `<li onclick="create_pages(` + i + `)"><a href="#" class="page_number ` + active_page + `">` + i + `</a></li>`;

        }

        // Next and Previous Button Functionality.

        prev.onclick = function () {
            current_page--;
            create_pages(current_page);
        }
        if(current_page <= 1){
            prev.style.display = "none";
        }else{
            prev.style.display = "block";
        }

        next.onclick = function () {
            current_page++;
            create_pages(current_page);
        }
        if(current_page >= total_page){
            next.style.display = "none";
        }else{
            next.style.display = "block";
        }

    }

</script>
</body>

</html>

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