code: function FilterCSS (options) {
    options = shallowCopyObject(options || {});
    options.whiteList = options.whiteList || DEFAULT.whiteList;
    options.onAttr = options.onAttr || DEFAULT.onAttr;
    options.onIgnoreAttr = options.onIgnoreAttr || DEFAULT.onIgnoreAttr;
    options.safeAttrValue = options.safeAttrValue || DEFAULT.safeAttrValue;
    this.options = options;
  }
docs: 创建CSS过滤器
  
  @param {Object} options
  - {Object} whiteList
  - {Function} onAttr
  - {Function} onIgnoreAttr
  - {Function} safeAttrValue