Deleting all documents in Firestore collection

I'm looking for a way to clear an entire collection. I saw that there is a batch update option, but that would require me to know all of the document IDs in the collection.

I'm looking for a way to simply delete every document in the collection.

Thanks!

Edit: Answer below is correct, I used the following:

  func delete(collection: CollectionReference, batchSize: Int = 100) {
    // Limit query to avoid out-of-memory errors on large collections.
    // When deleting a collection guaranteed to fit in memory, batching can be avoided entirely.
    collection.limit(to: batchSize).getDocuments { (docset, error) in
      // An error occurred.
      let docset = docset

      let batch = collection.firestore.batch()
      docset?.documents.forEach { batch.deleteDocument($0.reference) }

      batch.commit {_ in
        self.delete(collection: collection, batchSize: batchSize)
      }
    }
  }

The following javascript function will delete any collection:

deleteCollection(path) {
    firebase.firestore().collection(path).listDocuments().then(val => {
        val.map((val) => {
            val.delete()
        })
    })
}

This works by iterating through every document and deleting each.

Alternatively, you can make use of Firestore's batch commands and delete all at once using the following function:

deleteCollection(path) {
    // Get a new write batch
    var batch = firebase.firestore().batch()

    firebase.firestore().collection(path).listDocuments().then(val => {
        val.map((val) => {
            batch.delete(val)
        })

        batch.commit()
    })
}

There is now an option in the firebase CLI to delete an entire firestore database:

firebase firestore:delete --all-collections