- I am upgrading from angular 2 to angular 5.
- after upgradation I am seeing the below errors in the the ts file.
- in angular5 do I need to remove @angular/core and @angular/router
- after upgradation providing the package.json also
- providing my error and code snippet below.
- can you tell me how to fix it.
error
[ts] Cannot find module '@angular/core'.
[ts] Cannot find module '@angular/router'.
code
import {Component, ElementRef, Input,Output,EventEmitter,Inject, OnInit,ViewChild} from '@angular/core';
import {KendoGridComponent} from '../grid/gridponent'
import { Router} from '@angular/router';
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": ".git"
}
}
- I am upgrading from angular 2 to angular 5.
- after upgradation I am seeing the below errors in the the ts file.
- in angular5 do I need to remove @angular/core and @angular/router
- after upgradation providing the package.json also
- providing my error and code snippet below.
- can you tell me how to fix it.
error
[ts] Cannot find module '@angular/core'.
[ts] Cannot find module '@angular/router'.
code
import {Component, ElementRef, Input,Output,EventEmitter,Inject, OnInit,ViewChild} from '@angular/core';
import {KendoGridComponent} from '../grid/grid.component'
import { Router} from '@angular/router';
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"
}
}
3 Answers
Reset to default 22You need to install these dependencies manually.
$ npm i @angular/core -s
$ npm i @angular/router -s
I also faced the same issue while upgrading because of npm. I suggest you start using yarn instead.
Is this error coming from the compiler or an IDE tool like Intellisense? I find sometimes with installing/branch switching IDE tools like this can get confused and require a restart of the IDE.
If it won't compile, are the modules actually in your
node_modules?If not, delete yourpackage-lock.jsonorshrinkwrap.jsonand install again. NPM adds the package lock by default as of 5.0 and I find with complicated dependencies it can mess up sometimes.If they are there, run
npm pruneandnpm installagain.If that doesn't work, nuke
node_modulesalongside any lock file and install again.Do any third-party libraries require an update? Angular 5 had some breaking API changes. Check their docs if that's the case.
Consider Yarn.
I'm pretty sure it's the first one, but I'll leave all the steps I usually take just for the sake of completion.
Make sure you are exporting RouterModule in each router module that has children. In the angular documentation this is not explicitly stated as being necessary -- it's merely included in the examples -- but it is necessary, as one finds out after the customary several hours of edit-run-sigh, edit-run-shout, edit-run-google-editWithHope-scream-considerSmashingKeyboard, edit-run-cry, edit-run-solveByAccident-feelMomentaryPride (repeat).
The upshot: include RouterModule. The meta upshot: pay attention to the little seemingly unnecessary code in official documentation.
npm install? – P.S. Commented Jan 25, 2018 at 20:29