$(()=> { let param = {  tag: true,  num: 1,  ele: document.createElement('div'),  icon: '',  homeIcon: '',  moreIcon: '',  personalIcon: '',  closeIcon: '',  distance: '500',  css: "position:fixed;" +  "bottom:4rem;" +  "box-shadow:10px 10px 10px gray;" +  "right:10px;" +  "display:none;" +  "font-size:1.5rem;" +  "color:#fff;" +  "z-index:1000;" +  "height:2.5rem;" +  "width:2.5rem;" +  "background:#f44336;" +  "border-radius:50%;" +  "line-height:2.5rem;" +  "text-align:center",  menuCss: "position:absolute;" +  // "bottom:3rem;" +  "display:none;" +  "box-shadow:10px 10px 10px gray;" +  "font-size:1.2rem;" +  "color:#fff;" +  "background:orange;" +  "height:2rem;" +  "width:2rem;" +  "border-radius:50%;" +  "text-align:center;" +  "line-height:2rem;"  // type: '#top' }; {  document.querySelector('body').appendChild(((ele)=> {   ele.className = 'scroll iconfont';   ele.innerHTML = param.moreIcon;   // ele.href = param.type;   ele.style.cssText = param.css;   for (let i = 0; i < 3; i++) {    let menu_personal = document.createElement('a');    menu_personal.className = 'iconfont';    menu_personal.style.cssText = param.menuCss;    switch (i) {     case 0:      setStyle(menu_personal, '#2196f3', '2.4rem', '2.4rem', param.homeIcon, 'home');      break;     case 1:      setStyle(menu_personal, '#4caf50', 0, '3.5rem', param.personalIcon, 'personal');      break;     case 2:      setStyle(menu_personal, '#fdd835', '3.5rem', '0', param.icon, 'top');      break;    }    param.ele.appendChild(menu_personal);   }   return ele;  })(param.ele));  function setStyle(ele, ...args) {   ele.style.background = args[0];   ele.style.bottom = args[1];   ele.style.right = args[2];   ele.innerHTML = args[3];   ele.id = args[4];  } } {  $(window).scroll(()=> {   var scrollValue = $(window).scrollTop();   if (scrollValue > param.distance) {    if (param.tag) {     $(param.ele).css('display', 'block').animateCss('fadeInRight');     param.tag = !param.tag;    }   } else {    if (!param.tag) {     $(param.ele).css('display', 'none');     $(param.ele).children().css('display', 'none');     param.num++;     param.tag = !param.tag;    }   }  });  $(param.ele).click((e)=> {   window.e = e;   switch (e.target.id) {    case 'home':     if (!getTypeNative()) {      window.location.href = getAbsolutePath() + '/fenqihui/pages/recommended/recommended_index.html';     } else if (getTypeNative() === 'ios') {      backHome();     } else if (getTypeNative() === 'android') {      android.backHome();     }     break;    case 'personal':     if (!getTypeNative()) {      window.location.href = getAbsolutePath() + '/fenqihui/pages/account/user_personal.html';     } else if (getTypeNative() === 'ios') {      //todo://前往個人中心      backAccount();     } else if (getTypeNative() === 'android') {      android.backAccount();     }     break;    case 'top':     $(window).scrollTop(0);     break;   }   param.num % 2 == 0 && $(param.ele).children().css('display', 'none') || $(param.ele).children().css('display', 'block').animateCss('swing');   param.num++;  }) }});