“Comment supprimer une liste plate entière en un seul coup et une collection Firestore entière” Réponses codées

Comment supprimer une liste plate entière en un seul coup et une collection Firestore entière

deleting whole flatlist in one go using firestore 

filter data=(_item)=>{
   this.setState({users: this.state.users.filter(item => item. Key=== _item)});
    console.log(this.state.favorites) }
call this function in button deleteall code given below
 <Touchable Opacity
            onPress={() => {   async function massDeleteUsers() {
              // Get all users
              const usersQuerySnapshot = await firestore().collection('user').get(                 
              );             
              // Create a new batch instance
              const batch = firestore().batch();             
              usersQuerySnapshot.forEach(documentSnapshot => {
                batch.delete(documentSnapshot.ref); });             
              return batch.commit();}             
           massDeleteUsers().then(() =>{     
             this.filterdata()
               console.log('All users deleted in a single batch operation.')}) }}>
so this will delete whole flatlist in on go and delete whole firestore collection