找不到模块 \'fs\' 或其对应的类型声明答案

【问题标题】：Cannot find module 'fs' or its corresponding type declarations找不到模块 \'fs\' 或其对应的类型声明
【发布时间】：2022-11-05 02:12:58
【问题描述】：

我无法让打字稿识别“fs”模块。我收到以下错误：

    Error: src/app/components/drops/drops-map/drops-map.component.ts:9:29 - error TS2307: Cannot find module 'fs' or its corresponding type declarations.

9 import {readFileSync}  from 'fs';

我通过以下方式安装了定义：

 npm i @types/node --save-dev

我检查并 fs.d.ts 正确放置在 node_modules/@types/node 文件夹中

这是我的 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": "es2015",
    "module": "es2020",
    "lib": [
      "es2018",
      "dom"
    ],
    "typeRoots": [
      "node_modules/@types",
      "node_modules/@types/node"
    ],
  },
  "angularCompilerOptions": {
    "strictInjectionParameters": true,
    "strictInputAccessModifiers": true,
    "strictTemplates": true
  }
}

我删除了 node_modules 并使用 npm install 重新安装，但没有成功。

最后这是我的 package.json

{
  "name": "myapp",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "watch": "ng build --watch --configuration development",
    "test": "ng test"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~13.0.0",
    "@angular/cdk": "^13.0.2",
    "@angular/common": "~13.0.0",
    "@angular/compiler": "~13.0.0",
    "@angular/core": "~13.0.0",
    "@angular/fire": "^7.2.0",
    "@angular/flex-layout": "^12.0.0-beta.35",
    "@angular/forms": "~13.0.0",
    "@angular/google-maps": "^13.0.2",
    "@angular/material": "^13.0.2",
    "@angular/platform-browser": "~13.0.0",
    "@angular/platform-browser-dynamic": "~13.0.0",
    "@angular/router": "~13.0.0",
    "@googlemaps/markerclustererplus": "^1.2.8",
    "@zxing/browser": "^0.0.10",
    "@zxing/library": "^0.18.6",
    "@zxing/ngx-scanner": "^3.3.0",
    "firebase": "^9.4.0",
    "rxfire": "^6.0.0",
    "rxjs": "~7.4.0",
    "tslib": "^2.3.0",
    "zone.js": "~0.11.4"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~13.0.2",
    "@angular/cli": "~13.0.2",
    "@angular/compiler-cli": "~13.0.0",
    "@types/google.maps": "^3.46.1",
    "@types/jasmine": "~3.10.0",
    "@types/node": "^12.20.37",
    "jasmine-core": "~3.10.0",
    "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": "~4.4.3"
  }
}

请帮忙

【问题讨论】：

从文件名来看，您似乎正在尝试在 Angular 组件中使用 fs 模块。除非您仅将 fs 用于该组件（或类似组件）的服务器端呈现的服务器部分，否则您不能这样做。 fs 模块在浏览器中不存在，仅在 Node.js 中。
我怀疑您在tsconfig 中需要类似"lib":["node"] 的东西，但就像T.J.Crowder 提到的那样，如果您打算在客户端运行代码，这似乎不是一个正常的用例。
哦，我明白了，谢谢，这解释了一切。 :)

标签： typescript fs

【解决方案1】：

您缺少的是tsconfig.json，您需要将node 添加到打字稿编译器选项中的类型中：

{  
  "compilerOptions": {
    "types": ["node"]
  }
}

这样您就可以访问节点库。

【讨论】：