角度4到角度5无法找到模块'@ angular/router'

Question

• 我从角度2升级到角度5.
• 升级后,我在ts文件中看到以下错误.
• 在angular5中我需要删除@ angular/core和@ angular/router
• 升级后提供package.json也
• 在下面提供我的错误和代码段.
• 你能告诉我如何解决它吗？

错误

[ts]无法找到模块'@ angular/core'.
[ts]无法找到模块'@ angular/router'.

码

import {Component, ElementRef, Input,Output,EventEmitter,Inject, OnInit,ViewChild} from '@angular/core';
import {KendoGridComponent} from '../grid/grid.component'
import { Router} from '@angular/router';

的package.json

{
  "name": "SPORTS",
  "version": "1.0.0",
  "description": "SPORTS player - v0.2.37.1",
  "engines": {
    "node": "7.10.1"
  },
  "license": "ISC",
  "dependencies": {
    "@angular/animations": "^5.2.2",
    "@angular/common": "^5.2.2",
    "@angular/compiler": "^5.2.2",
    "@angular/compiler-cli": "^5.2.2",
    "@angular/core": "^5.2.2",
    "@angular/forms": "^5.2.2",
    "@angular/http": "^5.2.2",
    "@angular/platform-browser": "^5.2.2",
    "@angular/platform-browser-dynamic": "^5.2.2",
    "@angular/platform-server": "^5.2.2",
    "@angular/router": "^5.2.2",
    "@angular/upgrade": "2.0.0",
    "@ng-idle/core": "2.0.0-beta.2",
    "@ng-idle/keepalive": "2.0.0-beta.2",
    "@types/jquery": "^3.2.10",
    "@types/node": "^8.0.18",
    "@types/underscore": "^1.8.1",
    "@types/webpack": "^3.0.5",
    "angular2-in-memory-web-api": "0.0.21",
    "angular2-router-loader": "^0.3.5",
    "angular2-template-loader": "^0.6.2",
    "awesome-typescript-loader": "^3.2.1",
    "babel-minify-webpack-plugin": "0.2.0",
    "bootstrap": "^3.3.6",
    "commander": "^2.6.0",
    "compression-webpack-plugin": "1.0.1",
    "core-js": "^2.4.1",
    "css-loader": "^0.28.7",
    "del": "^3.0.0",
    "express": "^4.14.1",
    "extract-text-webpack-plugin": "^3.0.0",
    "file-loader": "^0.11.2",
    "file-saver": "^1.3.3",
    "html-webpack-plugin": "^2.30.1",
    "http-post": "^0.1.1",
    "http-proxy": "^1.8.1",
    "jquery": "2.2.3",
    "pako": "^1.0.5",
    "path": "^0.12.7",
    "raw-loader": "^0.5.1",
    "reflect-metadata": "^0.1.3",
    "require": "^2.4.20",
    "rxjs": "^5.5.6",
    "style-loader": "^0.18.2",
    "text-encoding-shim": "^1.0.0",
    "to-string-loader": "^1.1.5",
    "ts": "0.0.0",
    "typescript": "^2.4.2",
    "uglifyjs-webpack-plugin": "^0.4.6",
    "underscore": "^1.8.3",
    "webpack": "^3.5.6",
    "webpack-dev-server": "^2.7.1",
    "webpack-merge": "^4.1.0",
    "zone.js": "^0.6.23"
  },
  "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-clean-css": "^3.8.0",
    "gulp-concat": "^2.6.1",
    "gulp-util": "^3.0.8",
    "jasmine-core": "~2.4.1",
    "jasmine-expect": "^3.0.1",
    "jasmine-jquery": "^2.1.1",
    "karma": "^1.2.0",
    "karma-chrome-launcher": "^0.2.3",
    "karma-cli": "^0.1.2",
    "karma-coverage": "^1.1.1",
    "karma-htmlfile-reporter": "^0.2.2",
    "karma-jasmine": "^0.3.8",
    "karma-jquery": "^0.1.0",
    "karma-sourcemap-loader": "^0.3.7",
    "karma-typescript": "^2.1.4",
    "karma-typescript-preprocessor": "^0.3.0"
  },
  "main": "server.js",
  "scripts": {
    "dev": "webpack-dev-server --config  ./webpack.dev.js --inline --progress --color ",
    "postinstall": "webpack -p --config ./webpack.prod.js --progress --profile --bail",
    "start": "node server.js"
  },
  "repository": {
    "type": "git",
    "url": "https://github.iSPORTS.com/player-Replatform/webcomponent.git"
  }
}

Answer 1

您需要手动安装这些依赖项.

$ npm i @angular/core -s
$ npm i @angular/router -s

因为升级,我在升级时也遇到了同样的问题npm.我建议你开始使用纱线代替.

Answer 2

1. 这个错误是来自编译器还是像 Intellisense 这样的 IDE 工具？我发现有时安装/分支切换这样的 IDE 工具可能会感到困惑，并且需要重新启动 IDE。

2. 如果无法编译，这些模块是否确实在您的文件中node_modules?？如果不是，请删除您的package-lock.json或shrinkwrap.json并重新安装。NPM 从 5.0 开始默认添加包锁，我发现复杂的依赖关系有时会造成混乱。

3. 如果他们在那里，请再次npm prune奔跑npm install。

4. 如果这不起作用，请node_modules删除任何锁定文件并再次安装。

5. 是否有任何第三方库需要更新？Angular 5 进行了一些重大 API 更改。检查他们的文档是否是这样。

6. 考虑一下纱线。

我很确定这是第一个，但为了完成，我将保留我通常采取的所有步骤。