处理注释

  1. const processCommentNode = (n1, n2, container, anchor) => {
  2.   if (n1 == null) {
  3.     hostInsert(
  4.       (n2.el = hostCreateComment(n2.children || '')),
  5.       container,
  6.       anchor
  7.     )
  8.   } else {
  9.     // there's no support for dynamic comments
  10.     n2.el = n1.el
  11.   }
  12. }

总结：

  1. 新增：创建一个注释节点到container，指向新节点 n2 的 el
  2. 更新：新节点的 el 指向老节点的 el