import.meta.resolve for files

[mbostock]

You can use import.meta.resolve for JavaScript modules, but it’s not currently supported for files (as it assumes that the referenced file is in _import rather than _file). It would be nice as an alternative to FileAttachment(name).url() because it is synchronous, e.g.,

fetch(import.meta.resolve("./data/nyc-taxi.parquet"))

Related #954. Perhaps _import and _file could be combined? But the challenge there is we transpile JavaScript, and hence we want to keep _import and _file separate. 🤔

[Fil]

We can also use FileAttachment(name).href for synchronous resolution, but it's good to have both, especially since import.meta.resolve is a built-in function.