ie9 scrollreveal.js 无法获取未定义或 null 引用的属性“containers”

Question

    var config = {
      viewFactor : 0.15,
      duration   : 800,
      distance   : "0px",
      scale      : 0.8
    };

    window.sr = ScrollReveal( config );

    if (sr.isSupported()  && navigator.userAgent.indexOf("MSIE 9.0")>0) {
      document.documentElement.classList.add('sr');
    }
  

 var hero = {
    origin   : "top",
    distance : "24px",
    duration : 500,
    scale    : 1.05
  };

  var intro = {
    origin   : "bottom",
    distance : "64px",
    duration : 900,
    delay    : 200,
    scale    : 1
  };![图片描述][1]

  sr.reveal( ".g-bd .row-vip ul.col-img li", { reset: true, viewOffset: { top: 64 } } );
  // sr.reveal( ".g-bd .row-vip ul.col-img li", hero );
  sr.reveal( ".g-bd .top-banner", intro );
  sr.reveal( ".g-bd .row-brand .col-toto", intro );
  // sr.reveal( ".g-bd .row-vip ul.col-img li", 100 );
  sr.reveal( ".g-bd .row-safe .col-safe li", 200 );