error TS2300: Duplicate identifier 'type' in Angular. while running ng build

### Version info

**Angular: 12.2.0**

**Firebase: 9.0.0**

**@angular/fire: 7.0.0**

**Error: node_modules/@firebase/auth-compat/dist/auth-compat/index.d.ts:53:10 - error TS2300: Duplicate identifier 'type'.**

`import { type User, type Unsubscribe, type ActionCodeInfo, type UserCredential, type Auth, type IdTokenResult, type MultiFactorError, type MultiFactorResolver, type PopupRedirectResolver, type Dependencies, type AuthCredential, type ApplicationVerifier, type ConfirmationResult, type AuthProvider, type MultiFactorUser, type NextOrObserver, type ErrorFn, type CompleteFn, type ActionCodeSettings, type Persistence, type PhoneAuthCredential } from "@firebase/auth";`

**My package.json**
`"dependencies": {
"@angular/animations": "^11.2.9",
"@angular/cdk": "^13.0.2",
"@angular/common": "~12.2.0",
"@angular/compiler": "~12.2.0",
"@angular/core": "~12.2.0",
"@angular/fire": "^7.2.0",
"@angular/forms": "~12.2.0",
"@angular/material": "^11.2.12",
"@angular/platform-browser": "~12.2.0",
"@angular/platform-browser-dynamic": "~12.2.0",
"@angular/router": "~12.2.0",
"@ng-bootstrap/ng-bootstrap": "^10.0.0",
"angularfire2": "^5.4.2",
"aws-sdk": "^2.1081.0",
"bootstrap": "^5.1.3",
"concurrently": "^6.2.1",
"cors": "^2.8.5",
"file-saver": "^2.0.5",
"firebase": "^9.4.1",
"http": "0.0.1-security",
"http-client": "^4.3.1",
"http-server": "^13.0.2",
"karma-chai": "^0.1.0",
"karma-mocha": "^2.0.1",
"karma-spec-reporter": "0.0.32",
"karma-viewport": "^1.0.8",
"mocha": "^9.1.1",
"ngx-toastr": "^14.1.4",
"rxjs": "~6.6.0",
"tslib": "^2.3.0",
"util": "^0.12.4",
"uuid-generator-ts": "^1.1.0",
"zone.js": "~0.11.4"
},
"devDependencies": {
"@angular-devkit/build-angular": "~12.2.6",
"@angular/cli": "~12.2.6",
"@angular/compiler-cli": "~12.2.0",
"@types/file-saver": "^2.0.5",
"@types/jasmine": "~3.8.0",
"@types/node": "^12.20.46",
"@types/uuid": "^8.3.4",
"jasmine-core": "~3.8.0",
"karma": "~6.3.0",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage": "~2.0.3",
"karma-jasmine": "~4.0.0",
"karma-jasmine-html-reporter": "~1.7.0",
"typescript": "~4.3.5"
`
**My tsconfig.json**
`{
"compileOnSave": false,
"compilerOptions": {
"baseUrl": "./",
"outDir": "./dist/out-tsc",
"forceConsistentCasingInFileNames": true,
"strict": true,
"noImplicitReturns": true,
"noFallthroughCasesInSwitch": true,
"sourceMap": true,
"declaration": false,
"downlevelIteration": true,
"experimentalDecorators": true,
"moduleResolution": "node",
"importHelpers": true,
"target": "es2017",
"module": "es2020",
"lib": [
"es2018",
"dom"
]
},
"angularCompilerOptions": {
"enableI18nLegacyMessageIdFormat": false,
"strictInjectionParameters": true,
"strictInputAccessModifiers": true,
"strictTemplates": false
}
}`

after i **add skipLipCheck: true** in **tsconfig.json** file, i get below error.

`Error: node_modules/@firebase/auth-compat/dist/auth-compat/index.d.ts:53:421 - error TS1005: ',' expected.`

`import { type User, type Unsubscribe, type ActionCodeInfo, type UserCredential, type Auth, type IdTokenResult, type MultiFactorError, type MultiFactorResolver, type PopupRedirectResolver, type Dependencies, type AuthCredential, type ApplicationVerifier, type ConfirmationResult, type AuthProvider, type MultiFactorUser, type NextOrObserver, type ErrorFn, type CompleteFn, type ActionCodeSettings, type Persistence, type PhoneAuthCredential } from "@firebase/auth";`

How to fix this error?

先查看 package.json 和 tsconfig.json，然後執行 ng build，以重現來自 @firebase/auth-compat/dist/auth-compat/index.d.ts 的 TypeScript 錯誤。根據已回報的語法錯誤和重複識別碼錯誤，檢查 Angular、TypeScript、Firebase 和 @angular/fire 的版本；專案能夠在沒有這些錯誤的情況下建置即表示完成。

由索引模型根據 Issue 內容生成。