Unable to access variable outside of arrow function in react native

Asked May 10 '21 at 15:30

Active May 10 '21 at 15:48

Viewed 444 times

I have declare array out side of arrow function then pushing values in it inside arrow function but that array is only available inside of arrow function outside of it array is empty.

 var listings = [];
  

  
  dbRef.on("value", (snapshot) => {
    snapshot.forEach((listing) => {
    
      listings.push(listing.val());
    });
  
  
  });

  console.log('listing',listings);

console log display array value only inside of arrow function, what could be the reason

edited May 10 '21 at 15:48

Frank van Puffelen

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asked May 10 '21 at 15:30

Saad Ramay

The callback is asynchronous, you're logging the value before it has executed. – Barmar May 10 '21 at 15:41
What should be the method then? – Saad Ramay May 10 '21 at 15:42
Put it inside the callback function. – Barmar May 10 '21 at 15:52

Unable to access variable outside of arrow function in react native

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