Lock @babel/preset-env version to avoid breakage

[markhoney]

@babel/preset-env has removed utils.js in version 7.13.0, which is required by polyfills-plugin.js (https://github.com/nuxt/nuxt.js/blob/dev/packages/babel-preset-app/src/polyfills-plugin.js). This fix locks the dependency to 7.12.x.

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

@babel/preset-env has removed utils.js in version 7.13.0, which is required by polyfills-plugin.js (https://github.com/nuxt/nuxt.js/blob/dev/packages/babel-preset-app/src/polyfills-plugin.js). This fix locks the dependency to 7.12.x.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[markhoney]

I've reported the issue to the Babel team (babel/babel#12856) and they say that the utils.js file is not part of their public API, so they removed it.

[hzoo]

Yeah looks like that was just an internal file

I believe @JLHwung may do a PR to replace that function, it's also just 2 lines that could be substituted https://github.com/babel/babel/blob/d0b6f0fe0f8e1afb095e5fb419ed9ac56d4edee6/packages/babel-preset-env/src/utils.js#L63-L69.

[rallz-dev]

Are you guys planning on releasing this soon ? I was about to start a project with nuxt, but it's broken out of the box, the way it is now. Also, if this is going to take long, could you please point me to a solution to get started with it ?

[hzoo]

@JLHwung has a fix #8883

if are able to, you can force an older version in yarn by setting in your package.json

"resolutions": {
  "**/@babel/core": "7.12.17"
}

[rallz-dev]

@hzoo will this also work with npm ?

[rallz-dev]

"resolutions": {
"**/@babel/core": "7.12.17"
}

I tried adding this to my project (I'm using NPM btw) but I'm still getting this problem, isn't there any other workaround while this PR doesn't make it into the newest version of nuxt ?

[hzoo]

@rallz-dev ah, I just meant that as an example syntax. The issue is with @babel/preset-env so would modify that version. And that workaround is for yarn only then.

You can probably just do this, specify the version in your deps:

  "dependencies": {
    "core-js": "^3.8.3",
    "nuxt": "^2.14.12",
+   "@babel/preset-env": "~7.12.0"
  },

[rallz-dev]

thanks! that worked!

[Webdvpv]

It works for me

"dependencies": {
    "core-js": "^3.15.1",
    "nuxt": "^2.15.7"
  }