sadpandajoe opened a new issue, #44919:
URL: https://github.com/apache/superset/issues/44919

   
   ### Bug description
   
   `ExtentTag` uses truthiness checks for `fixedZoom`, `fixedLatitude` and 
`fixedLongitude`, so `0` (equator, prime meridian, zoom level 0) is rendered as 
"unset" even though the value is set.
   
   Steps to reproduce: Map View control -> Custom -> set extent with latitude 0 
(or longitude 0 / zoom 0) via "Use current extent" or the popover. The tag 
reads e.g. "Zoom: 5 | Lat: unset | Lon: 12.000000".
   
   Expected: "Lat: 0.000000".
   
   ### Where
   
   
`superset-frontend/src/explore/components/controls/MapViewControl/ExtentTag.tsx`
 L37-L43
   ```
   {value.fixedZoom ? Math.round(value.fixedZoom) : unsetName}
   {value.fixedLatitude ? value.fixedLatitude.toFixed(6) : unsetName}
   {value.fixedLongitude ? value.fixedLongitude.toFixed(6) : unsetName}
   ```
   
   ### Suggested fix
   
   Compare with `!= null` (or `typeof === 'number'`) instead of truthiness.
   
   ### Found by
   
   Found while adding React Testing Library coverage for Explore controls (all 
line numbers are against `master` at `bc3698b5d6`).
   


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