code: function warnSetHTML(el) {
      // dont warn if not in browser runtime
      /* istanbul ignore if */
      if (!(typeof window !== 'undefined' && typeof navigator !== 'undefined' && window.document)) {
          return;
      }
  
      // some html elements cannot set innerHTML in old ie
      // see: https://msdn.microsoft.com/en-us/library/ms533897(VS.85).aspx
      if (noSetHTML(el)) {
          warn('set html for element "' + el.tagName + '" may cause an error in old IE');
      }
  }
docs: #[begin] error 
  获取节点 stump 的 comment
  
  @param {HTMLElement} el HTML元素