pierrejeambrun commented on code in PR #25098:
URL: https://github.com/apache/airflow/pull/25098#discussion_r922656153


##########
airflow/www/static/js/api/useClearRun.ts:
##########
@@ -17,30 +17,30 @@
  * under the License.
  */
 
-import axios from 'axios';
+import axios, { AxiosResponse } from 'axios';
 import { useMutation, useQueryClient } from 'react-query';
 import { getMetaValue } from '../utils';
 import { useAutoRefresh } from '../context/autorefresh';
 import useErrorToast from '../utils/useErrorToast';
 
-const csrfToken = getMetaValue('csrf_token');
-const clearRunUrl = getMetaValue('dagrun_clear_url');
+const csrfToken = getMetaValue('csrf_token') || '';
+const clearRunUrl = getMetaValue('dagrun_clear_url') || '';

Review Comment:
   You are right, most of the `getMetaValue` are required, defaulting to an 
empty string is not great, and this pattern get duplicated everywhere. Raising 
an exception seems fair.
   
   We could parametrize this with something like:
   ```
   function getMetaValue(name: string, required: boolean = true)
   ```



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