Typescript @types/node 导入 fs 失败答案

【问题标题】：Typescript @types/node import fs failedTypescript @types/node 导入 fs 失败
【发布时间】：2017-08-12 03:48:57
【问题描述】：

我正在尝试在 Typescripts 中读取文件。我正在使用@types/node 而不是打字。

没有编译错误。但是调试器中的 fs 显示为未定义。我错过了什么？

test.ts

import * as fs from 'fs';
fs.readFile('../some.xml', 'utf8', function (err, data) {
    if (err) {
        return console.log(err);
    }
    console.log(data);
});

tsconfig.app.json

{
  "compilerOptions": {
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es2016",
      "dom"
    ],
    "outDir": "./dist",
    "target": "es5",
    "module": "es2015",
    "baseUrl": "",
    "typeRoots": [
      "node_modules/@types"
    ],
    "types": [
      "node"
    ]
  },
  "filesGlob": [
    "./node_modules/@types//.d.ts"
  ],
  "exclude": [
    "test-helpers",
    "test.ts",
    "**/*.spec.ts"
  ],
  "angularCompilerOptions": {
    "genDir": "./locale"
  }
}

package.json

{
  "name": "myApp",
  "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/common": "^2.4.0",
    "@angular/compiler": "^2.4.0",
    "@angular/core": "^2.4.0",
    "@angular/forms": "^2.4.0",
    "@angular/http": "^2.4.0",
    "@angular/platform-browser": "^2.4.0",
    "@angular/platform-browser-dynamic": "^2.4.0",
    "@angular/router": "^3.4.0",
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.20",
    "angular2-logger": "^0.5.1",
    "bootstrap": "^3.3.7",
    "core-js": "^2.4.1",
    "rxjs": "^5.1.0",
    "socket.io-client": "^1.7.2",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.7.6"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0-rc.0",
    "@angular/compiler-cli": "^2.4.0",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "@types/socket.io-client": "^1.4.29",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.4.2",
    "typescript": "~2.0.0"
  }
}

【问题讨论】：

检查编译后的代码。 require('fs') 在吗？不要相信调试器。它可以撒谎。无论如何，我认为 "module": "commonjs" 应该是 Node 环境的正确设置。
编译后的代码没有require('fs')。在我将 tsconfig.app.json 更改为"module": "commonjs" 后，fs 变成了一个只有 proto 的对象。 readFile() 仍未定义。
我不确定这怎么可能。再次，请提供真实信息，而不是您在调试器中看到的信息。如果错误显示“readFile 不是函数”，则问题应该反映这一点。请提供一种方法来重现此问题。回购什么的。

标签： node.js angular typescript

【解决方案1】：

我可以通过为节点安装 typings 文件来解决此问题：

typings install dt~node --global --save

【讨论】：