wireinet

$(document).ready(function(){
        var $menu = $(".menu-containers");
        $(window).scroll(function(){
            
            if ( $(this).scrollTop() > 100 && $menu.hasClass("top-menu-hide") ){
$menu.removeClass("top-menu-hide").addClass("top-menu-unhide"); }

            
            else if($(this).scrollTop() <= 100 && $menu.hasClass("top-menu-unhide")) {
$menu.removeClass("top-menu-unhide").addClass("top-menu-hide"); }

wireinet

HTML:
<div class="wrapper">
    <div class="tabs">
        <span class="tab">Вкладка 1</span>
        <span class="tab">Вкладка 2</span>
        <span class="tab">Вкладка 3</span>        
    </div>
    <div class="tab_content">
        <div class="tab_item">Содержимое 1</div>
        <div class="tab_item">Содержимое 2</div>

wireinet

<link rel="shortcut icon" type="image/x-icon" href="/images/favicon.ico">

wireinet

// totop
$(document).ready(function(){
    const totop = $(".totop");
    // hide #back-top first
    totop.hide();
    
    // fade in #back-top
    $(function () {
        $(window).scroll(function () {
            if ($(this).scrollTop() > 100) {

wireinet

* {
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

wireinet

$(document).ready(function(){
    $(".menu").hide();
    $(function(){
        $(window).scroll(function(){
            if ($($(this)).scrollTop() > 100)
                {
                    $(".menu").fadeIn();
                }
            else {$(".menu").fadeOut();}
        });

wireinet

// Определение Браузера
var BrowserDetect = {
        init: function () {
            this.browser = this.searchString(this.dataBrowser) || "Other";
            this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "Unknown";
        },
        searchString: function (data) {
            for (var i = 0; i < data.length; i++) {
                var dataString = data[i].string;
                this.versionSearchString = data[i].subString;

wireinet

$(function(){

    var hashTagActive = "";
        $(".scroll").on("click touchstart" , function (event) {
            if(hashTagActive != this.hash) { //this will prevent if the user click several times the same link to freeze the scroll.
                event.preventDefault();
                //calculate destination place
                var dest = 0;
                if ($(this.hash).offset().top > $(document).height() - $(window).height()) {
                    dest = $(document).height() - $(window).height();

wireinet

(function($) { 
//your code
})(jQuery);

// или

jQuery( document ).ready(function( $ ){
 //code
});

wireinet

// attach file
(function() {

  'use strict';

  $('.input-file').each(function() {
    var $input = $(this),
        $label = $input.next('.js-labelFile'),
        labelVal = $label.html();