纯js实现悬浮按钮组件

$(()=> {
 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://前往个人中心
      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++;
  })

 }
});