firebase-functions

The firebase-functions package provides an SDK for defining Firebase Functions.

Installation

In your Firebase project's functions directory, run:

npm install firebase-functions

Usage

// functions/index.js
var functions = require('firebase-functions');
var notifyUsers = require('./notify-users');

exports.newPost = functions.database
  .ref('/posts/{postId}')
  .onWrite(function(event) {
    // only execute function on creation
    if (!event.data.previous.exists()) {
      notifyUsers(event.data.val());
    }
  });