Tommie Podzemski

Tag: firebase emulators

How to trigger and run Firebase scheduled functions from localhost

October 14, 2020
Every wonder how to trigger Firebase scheduled (pubsub) functions directly from localhost during development? It’s actually quite easy, but for some reason not very well documented.

Start by installing Firebase CLI:
```
npm install -g firebase-tools
```
Setup local Firebase emulators:
```
firebase init emulators
```
Make sure that your firebase.json has a pubsub port defined.
```
"emulators": {
  ...
  "pubsub": {
    "port": "8085"
  }
```
Start your local emulators:
```
firebase emulators:start
```
Shell into the running Firebase emulator instance
```
firebase functions:shell
```
You can now trigger any functions.pubsub.schedule directly from this prompt. E.g:
```
scheduleNotifier();
```
You’re now able to significantly improve your firebase function development, since you can trigger the scheduled functions interactively.
```
firebase > scheduleNotifier();
'Successfully invoked function.'
firebase > >  No matching documents.
>  Notifier done: 0
```