My package.json
{
"name": "functions",
"description": "Cloud Functions for Firebase",
"scripts": {
"lint": "eslint .",
"serve": "firebase emulators:start --only functions",
"shell": "firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only functions",
"logs": "firebase functions:log"
},
"engines": {
"node": "16"
},
"main": "index.js",
"dependencies": {
"axios": "^0.27.2",
"firebase-admin": "^10.0.2",
"firebase-functions": "^3.21.2"
},
"devDependencies": {
"eslint": "^8.9.0",
"eslint-config-google": "^0.14.0",
"firebase-functions-test": "^0.2.0"
},
"private": true
}My .eslintrc.js
module.exports = {
root: true,
env: {
es6: true,
node: true,
},
extends: [
"eslint:recommended",
"google",
],
rules: {
quotes: ["error", "double"],
},
};A scrubbed version of my index.js
const admin = require('firebase-admin')
admin.initializeApp()
exports.sendMessage = functions.https.onCall(async (input) => {
// my code here
})Error from terminal
error Parsing error: Unexpected token =>
✖ 1 problem (1 error, 0 warnings)
Error: functions predeploy error: Command terminated with non-zero exit code1I'm thinking that the ESLint version that is being applied may be out of date? If so, how do I update it? Do I need to use a babel-eslint package (or newer)? Do I need to apply ES7 or 8 rules instead, and how?
You've only enabled es6: true. However, async functions are part of ES8 (ES2017). You'll want to use something more modern than ES6. Alternatively, set the parser options specifically.
I updated my .eslintrc.js file
module.exports = {
root: true,
parserOptions: {
ecmaVersion: "latest",
},
env: {
node: true,
},
extends: [
"eslint:recommended",
"google",
],
rules: {
quotes: ["error", "double"],
},
};This way, es6 was removed as a true value in env, and parserOptions was added with ecmaVersion set to latest release. I then just applied the rules based on the failed items. It works, but was a bit of a hassle. I suppose the code is cleaner at least...