When should i reindex Design Config Grid?

Question

There are different types of magento indexers as mentioned in

https://devdocs.magento.com/guides/v2.3/extension-dev-guide/indexing.html

Whats is use of Design Config Grid Indexer? and when does it get invalidate?

Answer 1

Design Config Grid Invalid time:

1. When anyone Create a new store, store view, Website at Magento.
2. Anyone deletes any store, store view, Website at Magento.

Then Design Config Grid indexer will be invalid

Magento will indexer invalid function all on aroundSave,afterDelete plugin of Magento\Store\Model\Website,Magento\Store\Model\Group,Magento\Store\Model\Website

After this two event on you need indexing over Design Config Grid.