Question: I want Cloud Function trigger only when document is create and update. I do not want Cloud Function trigger `onDelete`.

Is there any trigger for only `onCreate` and `onUpdate` without make 2 separate function?

I see Firebase have `onWrite`, but this trigger also `onDelete`:

> 
> onCreate Triggered when a document is written to for the first time.
> 
> 
> onUpdate Triggered when a document already exists and has any value
> 
> 
> changed. onDelete Triggered when a document with data is deleted.
> 
> 
> onWrite Triggered when onCreate, onUpdate or onDelete is triggered.
> 
> 
> 

 Thanks everyone!

Answer: 
You can use onWrite listener with handler that does nothing in case of deletion. 

```
exports.myFunction = functions.firestore
    .document('/abc/{docId}')
    .onWrite((change, context) => {

      // Exit when the data is deleted.
      if (!change.after.exists()) {
        return null;
      }

      //TODO: put code here you want to execute for create and update
    });

```
There are no combination triggers, so you will need to declare two Cloud Functions for this.

But you can implement your actual logic in a single regular function, and then just call that from the two Cloud Functions.

Something like

```js
exports.createUser = functions.firestore
    .document('users/{userId}')
    .onCreate((snap, context) => {
      doTheThing(snap, context);
    });

exports.updateUser = functions.firestore
    .document('users/{userId}')
    .onUpdate((change, context) => {
      doTheThing(change.after, context);
    });

function doTheThing(snapshot, context) {
    ...
};

```