后边的都不要了
否
是
没有找到相同的节点
newStartVnode == null
oldStartId = oldEndId && newStartId = newEndId
oldStartNode == null
!idxInOld
newEndVnode == null
newEndNode = newNodeChild[--newEndId]
oldEndNode = oldNodeChild[--oldEndId]
newStartId newEndId
newStartNode = newNodeChild[++newStartId]
开始
oldKeyToId === undefined
typeof newTree.children[0] == \"string\"判断当前节点是否是文本节点
oldStartId = 0oldEndId = oldNodeChild.length - 1newStartId = 0newEndId = newNodeChild.length - 1oldStartNode = oldNodeChild[0]oldEndNode = oldNodeChild[oldEndId]newStartNode = newNodeChild[0]newEndNode = newNodeChild[newEndId]oldKeyToIdidxInOldelmToMovebefore
找到节点并移动
oldTreenewTree
oldStartNode = oldNodeChild[++oldStartId]
结束
oldEndVnode == null
根节点变化整体删除新建
oldStartId oldEndId
记录文本变化
后边的都新增
idxInOld = oldKeyToId[newStartNode.key]
