How to test `functions.https.onCall` firebase cloud functions locally?

Question

I can\'t seem to find the solution for this in the Firebase Documentation.

I want to test my functions.https.onCall functions locally. Is it possible usi

Answer 1

you should first check for dev environment and then point your functions to local emulator.
For JS:

//after firebase init
if (window.location.host.includes("localhost") ||
    window.location.host.includes("127.0.0.1")
) {
    firebase
      .app()
      .functions()  //add location here also if you're mentioning location while invoking function()
      .useFunctionsEmulator("http://localhost:5001");
  }

or if you don't create instance of firebase then

//after firebase init
if (window.location.host.includes("localhost") || 
   window.location.host.includes("127.0.0.1")
) {
    firebase
      .functions()
      .useFunctionsEmulator("http://localhost:5001");
  }

---

or when serving pages from backend (node.js):

//after firebase init
if (process.env.NODE_ENV === 'development') {
  firebase.functions().useFunctionsEmulator('http://localhost:5001');
}