codesandbox / codesandbox/codesandbox-client

Svelte v4 breaks codesandbox

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Dominant language
JavaScript
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Description

🐛 Bug Report

Preflight Checklist

  • I have read the Contributing Guidelines for this project.
  • I agree to follow the Code of Conduct that this project
    adheres to.
  • I have searched the issue tracker for an issue that matches the one I want
    to file, without success.

Description of the problem

When I use the official Svelte codesandbox template, and try to update to the latest version of Svelte, I get an error "Unsupported Svelte version".

How has this issue affected you? What are you trying to accomplish?

I want to use the latest version of Svelte.

To Reproduce
  1. Create new svelte codesandbox with official template
  2. Update svelte dependency
  3. "Unsupported Svelte version" error appears
Link to sandbox: link
Your Environment
Software Name/Version
Сodesandbox 62a3c50a7
Browser Chrome 114.0.5735.198
Operating System MacOS

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The report names no source file, test, or entry point. Start by reproducing the failure from the linked sandbox using an updated Svelte dependency, then trace the official Svelte template's handling of the version; done means the latest Svelte version no longer produces “Unsupported Svelte version”.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
tooling
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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