角度4到角度5無法找到模塊'@ angular / router'

Question

• 我從角度2升級到角度5。
• 升級后，我在ts文件中看到以下錯誤。
• 在angular5中我需要刪除@ angular / core和@ angular / router
• 升級后提供package.json也
• 在下面提供我的錯誤和代碼段。
• 你能告訴我如何解決它嗎？

錯誤

[ts]無法找到模塊'@ angular / core'。
[ts]無法找到模塊'@ angular / router'。

碼

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

您需要手動安裝這些依賴項。

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

由於npm我在升級時也遇到了同樣的問題。 我建議你開始使用紗線代替。

Answer 2

1. 這個錯誤是來自編譯器還是像Intellisense這樣的IDE工具？ 我發現有時安裝/分支切換這樣的IDE工具可能會混淆並需要重新啟動IDE。

2. 如果它不能編譯，那么模塊實際上是在node_modules? 如果沒有，刪除package-lock.json或shrinkwrap.json並重新安裝。 默認情況下，NPM從5.0開始添加包鎖，我發現它有復雜的依賴關系，有時會搞亂。

3. 如果他們在那里，再次運行npm prune和npm install 。

4. 如果這不起作用， node_modules nuke node_modules與任何鎖定文件一起再次安裝。

5. 是否有任何第三方庫需要更新？ Angular 5有一些破壞API的變化。 檢查他們的文檔是否屬實。

6. 考慮紗線。

我很確定這是第一個，但為了完成，我會留下我通常采取的所有步驟。

Answer 3

確保在每個有子節點的路由器模塊中導出RouterModule 。 在角度文檔中，這沒有明確說明是必要的 - 它僅僅包含在示例中 - 但是有必要，正如人們在習慣性的幾個小時的編輯 - 運行 - 嘆息，編輯 - 運行 - 呼喊之后發現的那樣，編輯-run-google-editWithHope-scream-considerationSmashingKeyboard，edit-run-cry，edit-run-solveByAccident-feelMomentaryPride（repeat）。

結果：包括RouterModule 。 元結果：注意官方文檔中看似不必要的小代碼。