You seem to not be depending on “@angular/core”. T

Question

I want to create an angular 2 App with angular cli

I have written in the cmd:

npm install angular-cli -g

then:

ng firstngapp

but it show me an error when I write npm start !

I don't understand the problem

Answer 1

1. Delete node_modules folder and package-lock.json file.

2. Then run following command it will update npm packages.

   npm update

3. Later start project executing following command.

   ng serve

Above steps worked for me.

Answer 2

Faced the same Issue. While running ngserve you should be in the apps directory. To confirm(on GIT BASH : you will have (master) after the directory path at gitbash prompt, if you are at app directory.)

Answer 3

To solve this problem.

1. Step1: cd projectName
2. Step2: npm update
3. Step3: ng serve -o

For example :

Answer 4

The problem I had was that I followed the cli's advice to switch to yarn package management.

Then while following a tutorial I did npm install --save bootstrap, and after that point the error started appearing. Afterwards I did yarn add xxx of course and it worked.

To restore the project's state I removed node_modules and package-lock.json as per this answer and then run yarn install

Answer 5

If anyone is running into this in 2018, the thing that finally worked for me was to go into the my-app I created with ng new my-app, and THEN run ng serve This has to do with it needing the dependencies and devDependencies located in my-app/package.json instead of root/package.json. They are two separate files.

Even if I copied the all the dependencies to my root folder's package.json, I would also have to go in and manually change the path locations for the config files and such to go into my-app/*. It is much easier to just go into my-app/ and run ng serve there to let it all work like it is supposed to.

So these steps should work for anyone:

rm -rf <previous-app> // Whatever your previous app was called, if you had one.

sudo rm -rf node_modules

rm -f package-lock.json

npm install

ng new my-app

cd my-app

ng serve

Answer 6

While running ng serve you should be in the app's/project's directory.

If you run the command in another directory you get the error:

You seem to not be depending on "@angular/core". This is an error.