[Snyk] Security upgrade codemirror from 5.58.3 to 6.0.0

[saurabharch]

Snyk has created this PR to fix 1 vulnerabilities in the yarn dependencies of this project.

Snyk changed the following file(s):

• fixtures/dom/package.json
• fixtures/dom/yarn.lock

Note for zero-installs users

If you are using the Yarn feature zero-installs that was introduced in Yarn V2, note that this PR does not update the .yarn/cache/ directory meaning this code cannot be pulled and immediately developed on as one would expect for a zero-install project - you will need to run yarn to update the contents of the ./yarn/cache directory.
If you are not using zero-install you can ignore this as your flow should likely be unchanged.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Regular Expression Denial of Service (ReDoS) SNYK-JS-CODEMIRROR-10494092	666

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Regular Expression Denial of Service (ReDoS)

[gemini-code-assist]

Summary of Changes

Hello @saurabharch, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request, automatically generated by Snyk, upgrades the codemirror package to its major version 6.0.0. The primary purpose of this upgrade is to mitigate a critical Regular Expression Denial of Service (ReDoS) vulnerability.

Highlights

• Dependency Upgrade: The codemirror package has been upgraded from version 5.58.3 to 6.0.0.
• Security Fix: This upgrade addresses a Regular Expression Denial of Service (ReDoS) vulnerability identified as SNYK-JS-CODEMIRROR-10494092.
• Automated Remediation: This pull request was automatically generated by Snyk to apply the necessary security fix.
• Yarn Zero-Installs Note: Users leveraging Yarn's zero-installs feature are advised to run yarn after pulling this PR to update the .yarn/cache directory, as it is not automatically updated.

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[gemini-code-assist]

Code Review

This pull request, automatically generated by Snyk, upgrades codemirror from version 5 to 6 to fix a security vulnerability. While the dependency update itself is correct, this is a major version upgrade with significant breaking changes. The current implementation using codemirror in fixtures/dom/src/components/fixtures/hydration/Code.js is not compatible with version 6 and will break the application. The code needs to be migrated to the new API before this PR can be safely merged. I have left a critical comment on package.json with more details.

[gemini-code-assist]

This pull request upgrades CodeMirror from version 5 to 6. This is a major version bump with significant breaking changes. The existing implementation in fixtures/dom/src/components/fixtures/hydration/Code.js uses the CodeMirror 5 API and will break with this upgrade.

For example, CodeMirror 6 is modular and has a different initialization process. The CodeMirror.fromTextArea method is no longer available. You can see the current usage in fixtures/dom/src/components/fixtures/hydration/Code.js:31:

this.editor = CodeMirror.fromTextArea(this.textarea, { /* ... */ });

Also, imports like codemirror/mode/jsx/jsx and codemirror/lib/codemirror.css are not valid anymore, as seen in fixtures/dom/src/components/fixtures/hydration/Code.js:18-19:

import('codemirror/mode/jsx/jsx'),
import('codemirror/lib/codemirror.css'),

The code needs to be updated to use the new CodeMirror 6 API. You can find the migration guide here: https://codemirror.net/docs/migration/

This automated upgrade is not safe to merge without migrating the application code.