how Implementing a highlight feature for this code

Question

this code is being using for live search and i want to highlight each character in the table when i type it in search box so how can i do this ?

$(document).ready(function() {
    $("#search-box").on("keyup", function() {
        var value = $(this).val().toLowerCase();
        var filter = $('#search-filter').val().toLowerCase();
        if (filter == "listitem") {
            $(".listitem").filter(function() {
                $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1)
            });
        } else {
            $(".td-" + filter).filter(function() {
                $(this).parent().toggle($(this).text().toLowerCase().indexOf(value) > -1)
            });
        }
    });

    $('#search-filter').on("change", function() {
        var value = $("#search-box").val().toLowerCase();
        var filter = $(this).val().toLowerCase();
        if (filter == "listitem") {
            $(".listitem").filter(function() {
                $(this).toggle($(this).text().toLowerCase().indexOf(value) > -1)
            });
        } else {
            $(".td-" + filter).filter(function() {
                $(this).parent().toggle($(this).text().toLowerCase().indexOf(value) > -1)
            });
        }
    });

    $(".tbl-btn").click(function(e) {
        e.preventDefault();
        $(this).parent().parent().find('td:not(:first-child)').toggleClass('active');
        $(this).toggleClass('rotate');
    });
});