jQuery: pagination

more at: http://web.enavu.com/tutorials/making-a-jquery-pagination-system/

by Shawn Wood

HTML

<ul id=list>
    <li>Item 1</li>
    <li>Item 2</li>
    <li>Item 3</li>
    <li>Item 4</li>
    <li>Item 5</li>
    <li>Item 6</li>
    <li>Item 7</li>
    <li>Item 8</li>
    <li>Item 9</li>
    <li>Item 10</li>
</ul>

CSS

.controls a{
    padding:3px;
    border:1px solid gray;
    margin:2px;
    color:black;
    text-decoration:none
}
.active{
    background:darkblue;
    color:white !important;
}

a{color:#007bff;text-decoration:none;background-color:transparent}a:hover{color:#0056b3;text-decoration:underline}a:not([href]){color:inherit;text-decoration:none}a:not([href]):hover{color:inherit;text-decoration:none}.close{float:right;font-size:1.5rem;font-weight:700;line-height:1;color:#000;text-shadow:0 1px 0 #fff;opacity:.5}.close:hover{color:#000;text-decoration:none}.close:not(:disabled):not(.disabled):focus,.close:not(:disabled):not(.disabled):hover{opacity:.75}button.close{padding:0;background-color:transparent;border:0;-webkit-appearance:none;-moz-appearance:none;appearance:none}a.close.disabled{pointer-events:none}figure{margin:0 0 1rem}img{vertical-align:middle;border-style:none}svg{overflow:hidden;vertical-align:middle}caption{padding-top:.75rem;padding-bottom:.75rem;color:#6c757d;text-align:left;caption-side:bottom}label{display:inline-block;margin-bottom:.5rem}button{border-radius:0}button:focus{outline:1px dotted;outline:5px auto...

JavaScript

$(document).ready(function() {

    var show_per_page = 5;
    var number_of_items = $('#list').children('li').size();
    var number_of_pages = Math.ceil(number_of_items / show_per_page);

    $('<div class=controls></div><input id=current_page type=hidden><input id=show_per_page type=hidden>').insertAfter('#list');
    $('#current_page').val(0);
    $('#show_per_page').val(show_per_page);

    var navigation_html = '<a class="prev" onclick="previous()">Prev</a>';
    var current_link = 0;
    while (number_of_pages > current_link) {
        navigation_html += '<a class="page" onclick="go_to_page(' + current_link + ')" longdesc="' + current_link + '">' + (current_link + 1) + '</a>';
        current_link++;
    }
    navigation_html += '<a class="next" onclick="next()">Next</a>';

    $('.controls').html(navigation_html);
    $('.controls .page:first').addClass('active');

    $('#list').children().css('display', 'none');
    $('#list').children().slice(0, show_per_page).css('display', 'block');

});



function go_to_page(page_num) {
    var show_per_page = parseInt($('#show_per_page').val(), 0);

    start_from = page_num * show_per_page;

    end_on = start_from + show_per_page;

    $('#list').children().css('display', 'none').slice(start_from, end_on).css('display', 'block');

    $('.page[longdesc=' + page_num + ']').addClass('active').siblings('.active').removeClass('active');

    $('#current_page').val(page_num);
}



function previous() {

    new_page = parseInt($('#current_page').val(), 0) - 1;
    //if there is an item before the current active link run the function
    if ($('.active').prev('.page').length == true) {
        go_to_page(new_page);
    }

}

function next() {
    new_page = parseInt($('#current_page').val(), 0) + 1;
    //if there is an item after the current active link run the function
    if ($('.active').next('.page').length == true) {
        go_to_page(new_page);
    }

}