node compat: cannot start docusaurus

[cknight]

Version: Deno 1.42.0

I'm attempting to run Docusaurus locally, replacing npm start with deno task start. I get the following error message:

Unstable API 'Deno.FsFile.syncSync'. The `--unstable-fs` flag must be provided.

I am unable to specify the --unstable-fs flag in the deno command at any position which makes it take affect.

Related: #19395

[alexgleason]

I ran into this issue too. Whether Docusaurus works or not, this is the problem to highlight:

I am unable to specify the --unstable-fs flag in the deno command at any position which makes it take affect.

It's not possible to pass deno flags like -A or --unstable-* when running package.json tasks.

[bartlomieju]

@littledivy does #23202 fix this issue too?

[littledivy]

Yes but the --unstable-fs is still required. It can be fixed by adding this to deno.json:

// deno.jsonc
{ 
  unstable: ["fs"]
}