XD-DENG commented on pull request #13884:
URL: https://github.com/apache/airflow/pull/13884#issuecomment-766848218


   > This is certainly a typo. With and without the fix, I see no issues in the 
browser. Would take a bit more effort to determine if/why it is necessary to be 
there at all.
   
   Hi @ryanahamilton , yes you are right, there will be no issue without this 
fix. Because of the typo, this parameter is not useful/helpful at all. When 
`.data(states)` is called, it cannot find `states` in its current block, so it 
goes one level up, and `states` is available there 
https://github.com/apache/airflow/blob/326c74e60871736f43c303068b0aaa5927c50de0/airflow/www/templates/airflow/dags.html#L460-L463
   
   This may become a potential source of error/confusion though in the future, 
so fixing it. 


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