找不到模块“@angular/core”。在我的离子应用程序中答案

【问题标题】：Cannot find module '@angular/core'. in my ionic app找不到模块“@angular/core”。在我的离子应用程序中
【发布时间】：2018-11-26 18:01:57
【问题描述】：

我正在构建一个离子应用程序，但是当我添加一个新页面时，它给了我这个错误。

找不到模块“@angular/core”

当从 '@angular/core' 导入 { Component } 时；我检查了 node_modules 文件夹，我没有在 @angular 文件夹下找到核心文件夹。离子 CLI 版本：4.4.0

我尝试卸载 npm 并重新安装，但没有成功。

Package.json 文件：

    {
  "name": "fuberSims",
  "version": "0.0.1",
  "author": "Ionic Framework",
  "homepage": "http://ionicframework.com/",
  "private": true,
  "scripts": {
    "clean": "ionic-app-scripts clean",
    "build": "ionic-app-scripts build",
    "lint": "ionic-app-scripts lint",
    "ionic:build": "ionic-app-scripts build",
    "ionic:serve": "ionic-app-scripts serve"
  },
  "dependencies": {
    "@angular/cdk": "^5.2.4",
    "@angular/common": "4.1.3",
    "@angular/compiler": "4.1.3",
    "@angular/compiler-cli": "4.1.3",
    "@angular/core": "4.1.3",
    "@angular/forms": "4.1.3",
    "@angular/http": "4.1.3",
    "@angular/material": "^4.1.3",
    "@angular/platform-browser": "4.1.3",
    "@angular/platform-browser-dynamic": "4.1.3",
    "@ionic-native/camera": "^4.7.0",
    "@ionic-native/core": "4.4.0",
    "@ionic-native/device": "^4.5.3",
    "@ionic-native/diagnostic": "^4.7.0",
    "@ionic-native/email-composer": "^4.17.0",
    "@ionic-native/file": "^4.7.0",
    "@ionic-native/file-path": "^4.7.0",
    "@ionic-native/geolocation": "^4.5.3",
    "@ionic-native/location-accuracy": "^4.7.0",
    "@ionic-native/splash-screen": "4.4.0",
    "@ionic-native/status-bar": "^4.9.0",
    "@ionic-native/transfer": "^3.14.0",
    "@ionic/storage": "^2.1.3",
    "cordova-android": "7.0.0",
    "cordova-plugin-camera": "^4.0.2",
    "cordova-plugin-device": "^2.0.1",
    "cordova-plugin-file": "^6.0.1",
    "cordova-plugin-file-transfer": "^1.7.1",
    "cordova-plugin-filepath": "^1.3.0",
    "cordova-plugin-geolocation": "^4.0.1",
    "cordova-plugin-ionic-keyboard": "^2.0.5",
    "cordova-plugin-ionic-webview": "^1.1.16",
    "cordova-plugin-request-location-accuracy": "^2.2.2",
    "cordova-plugin-splashscreen": "^5.0.2",
    "cordova-plugin-whitelist": "^1.3.3",
    "cordova.plugins.diagnostic": "^4.0.8",
    "ionic-angular": "3.9.2",
    "ionic-scrolling-header": "^0.1.1",
    "ionicons": "3.0.0",
    "rxjs": "5.5.2",
    "sw-toolbox": "3.6.0",
    "zone.js": "0.8.18"
  },
  "devDependencies": {
    "@ionic/app-scripts": "3.1.8",
    "typescript": "2.4.2"
  },
  "description": "An Ionic project",
  "cordova": {
    "plugins": {
      "cordova-plugin-whitelist": {},
      "cordova-plugin-device": {},
      "cordova-plugin-splashscreen": {},
      "cordova-plugin-ionic-webview": {},
      "cordova-plugin-ionic-keyboard": {},
      "cordova-plugin-geolocation": {
        "GEOLOCATION_USAGE_DESCRIPTION": "To locate you"
      },
      "cordova-plugin-camera": {},
      "cordova-plugin-file": {},
      "cordova-plugin-file-transfer": {},
      "cordova-plugin-filepath": {},
      "cordova-plugin-request-location-accuracy": {},
      "cordova.plugins.diagnostic": {}
    },
    "platforms": [
      "android"
    ]
  }
}

【问题讨论】：

你能分享你的 package.json 文件吗？我认为可能存在依赖问题。
@Smollet777 添加了 package.json。
你重新安装了 npm 但你有没有尝试重新安装你的模块？
@Smollet777 不，请给我命令。
npm intall 在您的项目目录中将根据 package.json 重新安装所有节点模块

标签： npm ionic4

【解决方案1】：

我通过从我的项目中删除 node_modules 文件夹并再次运行 npm install 解决了这个问题。

【讨论】：

【解决方案2】：

我遇到了这个问题，因为在一个离子原生插件中，我在import statement 的末尾有一个/ngx。删除 /ngx 部分为我解决了它。

【讨论】：