Reduce the number of links in bootstrap pagination

pagination reduction.js

$(function () {

    var radius = 4;
    var replacementForHiddenContent = "<li><a>...</a></li>";

    var $pages = $(".js-page");

    var $activePage = $pages.filter(".active");

    var indexOfActive = $pages.index($activePage);

    var indexOfFirst = Math.max(indexOfActive - radius, 0);
    var indexOfLast = indexOfFirst + 2 * radius + 1;

    $pages.each(function(i, value) {
        if (i < indexOfFirst || i > indexOfLast) {
            $(value).hide();
        }
    });
            
    if (indexOfFirst > 0) {
        $pages.first().before(replacementForHiddenContent);
    }
            
    if (indexOfLast < $pages.length - 1) {
        $pages.last().after(replacementForHiddenContent);
    }
});