Node js Engine not upgrading for firebase function node compatibility

First failed

Here is the package.json

 "engines": {
        "node": "8.0.0"
      },

Error: package.json in functions directory has an engines field which is unsupported. Valid choices are: {“node”: 10|12|14|16}

Deploys to runtimes below Node.js 10 are now disabled in the Firebase CLI. Existing Node.js 8 functions will stop executing at a future date. Update existing functions to Node.js 10 or greater as soon as possible.

I also try to upgrade the engine but getting this:

 "engines": {
    "node": "10.0.0"
  },

then:

 npm install

then:

 firebase deploy --only functions

Again getting this error:

Error: package.json in functions directory has an engines field which is unsupported. Valid choices are: {“node”: 10|12|14|16}

Deploys to runtimes below Node.js 10 are now disabled in the Firebase CLI. Existing Node.js 8 functions will stop executing at a future date. Update existing functions to Node.js 10 or greater as soon as possible.

Answer

The error message is saying that you need to provide either “10” or “12” or “14” or “16”. It should not contain dots.

 "engines": {
    "node": "10"
  },

I suggest reviewing the documentation as well.