Angular 4, angularfire2, Metadata version mismatch

Question

I've got the following error

Metadata version mismatch for module c:/..../node_modules/angularfire2/index.d.ts, found version4, expected 3.

And if I go and check in my package.json, I have angularfire2 on version 5.0.0-rc.4, and firebase on 4.6.2. see screenshot for details

I tried changing the version of angularfire2 and firebase to previous versions but nothing worked.

Any suggestions ? Thank you.

{
  "name": "twitter-revamped",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^4.2.4",
    "@angular/common": "^4.2.4",
    "@angular/compiler": "^4.2.4",
    "@angular/core": "^4.2.4",
    "@angular/forms": "^4.2.4",
    "@angular/http": "^4.2.4",
    "@angular/platform-browser": "^4.2.4",
    "@angular/platform-browser-dynamic": "^4.2.4",
    "@angular/router": "^4.2.4",
    "angularfire2": "^5.0.0-rc.4",
    "core-js": "^2.4.1",
    "firebase": "^4.6.2",
    "ng2-semantic-ui": "^0.9.6",
    "rxjs": "<5.4.2",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.4.7",
    "@angular/compiler-cli": "^4.2.4",
    "@angular/language-service": "^4.2.4",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.2.0",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "~1.7.0",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.2.0",
    "tslint": "~5.7.0",
    "typescript": "~2.3.3"
  }
}

Answer 1

This is how I solved this problem. Follow the steps as i have listed:

STEP 1: Uninstall previous angularfire2 installed pacakge

npm uninstall angularfire2

STEP 2: Install angularfire2 5.0.0-rc.3

npm install [email protected] --save

STEP 3: Check your package.json

Make sure you have the following lines under dependencies in package.json

"angularfire2": "^5.0.0-rc.3",
"firebase": "^4.6.0",

This is how i solved the problem.

Answer 2

I solved it

Had to set firebase and angularfire2 to this:

"firebase":"4.6.0", "angularfire2": "5.0.0-rc.3"

but then I got another error:
"@angular/compiler-cli" package was not properly installed. Error: Error: Cannot find module '@angular/compiler-cli'

A npm install fixed it.

Answer 3

I tried above solutions but it didn't solve my issue. I tried the below steps & it solved my issue.

The issue actually occurred when npm install angularfire2 firebase --save command was run. Below dependencies were added in package.json

"angularfire2": "^5.0.0-rc.4",
"firebase": "^4.7.0"

Actual issue here is due to the version of angularfire2. We need to have angularfire2": "^5.0.0-rc.3 instead of angularfire2": "^5.0.0-rc.4. I am not aware as to why this version is having issue.

Below are the steps for resolution:

STEP 1: Uninstall angularfire2 & firebase

npm uninstall angularfire2 firebase --save

STEP 2: Install angularfire2 5.0.0-rc.3 version

npm install [email protected] --save

STEP 3: Install firebase

npm install firebase --save

STEP 4: Check dependencies added in package.json

"angularfire2": "^5.0.0-rc.3",
"firebase": "^4.7.0"

STEP 5: Execute ng serve

ng serve

This solves the issue & application compiles successfully.

Answer 4

I faced the same problem but solved it by changing the release candidate on angularfire2 back to 3 like "angularfire2": "^5.0.0-rc.3" from "angularfire2": "^5.0.0-rc.4" in your package.json file. then delete node modules and run npm i or npm install.

Or you can unintall angularfire2 make sure you also remove it from your package.json and package.json.lock files. reinstall it and specify the release candidate like npm install [email protected] --save.