[Solved] Error in nextTick: “TypeError: undefined is not iterable

Error in nextTick: “TypeError: undefined is not iterable (cannot read property Symbol(Symbol.iterator))”


The parent component did not pass the corresponding parameter Found:

<label-template
   :image-list="checkImageList"
   :tag-list="tagList"
   @onAllFeatures="onAllFeatures"
   :active-tab="activeTab"
   @next-page="nextPage"
   @previous-page="previousPage"
 />
historicalList.length //The parent component does not pass list, but the child component uses it and gets the length