When deps are updated Stackblitz can't find core-js

[oleersoy]

I have this project:

https://stackblitz.com/edit/slice-todo

It runs with the current dependency versions, but if I updated the deps I get the message:

Can't find package:core-js

Thoughts?

[beeman]

Hey @oleersoy I have seen the same issue, you can work around it by installing core-js@2

[oleersoy]

Hey @beeman - That was a sweet comment! It works now! Thanks!

[kolkov]

The same error in my https://github.com/kolkov/angular-editor library.

[MurhafSousli]

Thanks @beeman.. in the right place in the right time

[wzup]

@beeman

you can work around it by installing core-js@2

HOW?? How to install anything in Stackblitz? Does it have CLI?

[nimirea]

@wzup You can change the versions of installed packages (or add new packages) for a project in the package.json file. Just change core-js: "^3.1.4" to core-js: "2.6.9"

[seoriam]

@wzup @nimirea You may also change it via the 'Dependencies' tab under the 'Project' tab (icon shaped like files) on the left sidebar.

If you shorten the 'Files' tab and expand the 'Dependencies', you can see the text input with placeholder "enter package name". You may enter your desired package and version with the format {package}@{version} (without the curly braces).

So downgrading core-js to 2 is as simple as entering core-js@2 to the input and hitting enter. Same when upgrading or installing additional dependencies. I love StackBlitz.

[fr0]

Downgrading to core-js@2 is a great workaround for some people, but if the behavior you're trying to replicate in your stackblitz depends on corejs@3, that's... not so great.

I'm very curious what bug would cause this. Doesn't stackblitz use the global npm registry?

[omostan]

@wzup You can change the versions of installed packages (or add new packages) for a project in the package.json file. Just change core-js: "^3.1.4" to core-js: "2.6.9"

Your suggestion solved the problem.
Thanks!

[ghost]

I had the same problem, this might be the same issue. if you open polyfills.ts in your angular project. You will have

import 'core-js/es6/symbol';

here core-js/es6 is doesn't exist since v3, update it to core-js/es

import 'core-js/es/symbol';

[omostan]

I had the same problem, this might be the same issue. if you open polyfills.ts in your angular project. You will have

import 'core-js/es6/symbol';

here core-js/es6 doesn't exist since v3, update it to core-js/es

import 'core-js/es/symbol';

This is the best solution to the problem. With this solution, you can still use core-js current version without errors. According to @sibiraj-sr, core-js/es6 or core-js/es7 were removed from core-js v3. Editing polyfills.ts as stated removes the errors.

[purplem1lk]

Hey @oleersoy I have seen the same issue, you can work around it by installing core-js@2

I had the same problem, this might be the same issue. if you open polyfills.ts in your angular project. You will have

import 'core-js/es6/symbol';

here core-js/es6 is doesn't exist since v3, update it to core-js/es

import 'core-js/es/symbol';

Thank you for your patience - This issue has been resolved and will be closed accordingly. If this issue persists, feel free to tag me or ask to reopen this issue with screenshots of the error. Thank you! :)