摘要:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv 阅读全文
摘要:
1.返回顶部 $(function(){ $('.top').hide(); $(window).scroll(function() { if($(window).scrollTop() >= 100){ $('.top').fadeIn(300); }else{ $('.top').fadeOut 阅读全文