WIP: bring REPL over

[Rich-Harris]

lots of stuff broken currently

we don't have the ability to mark PRs as draft while this repo is private, so 'WIP' will have to do

[dummdidumm]

Where was the initial commit of the REPL package and the svelte.dev site from (what repo, what branch on that repo)? A bit surprised that we need to "bring the REPL over" when it's already in here.

[Rich-Harris]

The REPL on the preview site has many unreleased changes

[dummdidumm]

So you brought over the repl from the sites repo and are now replacing/merging it with the content from the preview site?

[Rich-Harris]

yes

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Name	Status	Preview	Comments	Updated (UTC)
omnisite	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 11, 2024 10:33pm

[dummdidumm]

Regarding runes: it's too late now I guess but my idea was to have it working in legacy mode first to test the robustness of our backwards compat. Then run the migration script to see how good it already works.

[Rich-Harris]

The preview REPL has been stress testing compatibility for the last several months — I'd say we pass. As for automated migration, I don't think the REPL is a great candidate as so much of it is gnarly store code that will need to be manually overhauled

[Rich-Harris]

I can't for the life of me get the <CodeMirror> component to actually show the code. Editing works — it updates the Result tab — but it won't initialise correctly, and the JS and CSS output tabs are blank.

Going to log off for a bit and see if being outside somehow fixes it

[Rich-Harris]

Downgrading neocodemirror fixed it — something to do with the new 'document mode'

Lots to do still but I think this is good enough to merge