我前面判断SELECTION_CACHE[selectionStateKey][cachedActiveType]是否为undefined,如果是undefined给了默认值{},最后 typescript报错说,SELECTION_CACHE[selectionStateKey][cachedActiveType]可能是undefined。这怎么解决???
SELECTION_CACHE[selectionStateKey][cachedActiveType]
undefined
{}
SELECTION_CACHE[selectionStateKey][cachedActiveType]![type] = value如果真的确认不是undefined的话 这样写
SELECTION_CACHE[selectionStateKey][cachedActiveType]![type] = value
具体请看https://www.typescriptlang.or...
2.1m questions
2.1m answers
60 comments
56.8k users