score:1
try updating the state when fetching values from firebase:
return firebase.database().ref('users/trainers/').on('value', (snapshot) => {
const childtrainersnapshot = snapshot.map(childsnapshot => {
return childfirstname + ' ' + childlastname + ' ' + childemail
});
this.setstate({ childtrainers: childtrainersnapshot });
})
Source: stackoverflow.com
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