fixed the error shown when switching from selected country to worldwide option

CleverProgrammers / react-covid-tracker

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fixed the error shown when switching from selected country to worldwide option #21

Open V-Karthik-221199 opened 3 years ago

V-Karthik-221199 commented 3 years ago

Fixed the error ( Unhandled Rejection TypeError: Cannot read property 'lat' of undefined ) shown when switching from selected country to worldwide option and also fixed some warnings showed in console due to key issue related to map functions.

git pull req