nezha/resource/static/theme-daynight/js/navtop.js

$(document).ready((function(){$(".hamburger").click((function(){$(this).toggleClass("is-active"),$(".nav-menu").toggleClass("active"),$(".nav-bar").toggleClass("active")}))}));var btn=$("#back-to-top");$(window).scroll((function(){$(window).scrollTop()>300?btn.addClass("show"):btn.removeClass("show")})),btn.on("click",(function(o){o.preventDefault(),$("html, body").animate({scrollTop:0},"300")}));