"'import.meta' cannot be used outside of module code" error when upgrading to meteor 3

[kfritsch]

I get a build error when upgrading to meteor 3.0.3 with minifier version 5.3.1. It did not happen with meteor 2.10.0 on the same version and there is also no error when using the default minifier and meteor 3.0.3.

Error message

     While minifying app code:

   /Users/kaifritsch/.meteor/packages/zodern_standard-minifier-js/.5.3.1.13xodu.yv0c3++os+web.browser+web.browser.legacy+web.cordova/plugin.fastMinifier.os/npm/node_modules/meteor/fastMinifier/node_modules/meteor-package-install-swc/.swc/node_modules/@swc/core/index.js:110:29: 
   × 'import.meta' cannot be used outside of module
   code.
   ╭─[567:1]
   567 │   if (typeof WorkerGlobalScope < "u" && self instanceof
   WorkerGlobalScope) {
   568 │     if (typeof o != "string")
   569 │       throw Error("corePath should be a string!");
   570 │     const y = new URL(o, import.meta.url).href, m = await
   W(
   ·                          ───────────
   571 │       y,
   572 │       "application/javascript"
   573 │     ), v = await W(
   ╰────
   
   × 'import.meta' cannot be used outside of module
   code.
   ╭─[595:1]
   595 │   }
   596 │   if (typeof o != "string")
   597 │     throw Error("corePath should be a string!");
   598 │   const p = new URL(o, import.meta.url).href, c = await
   W(
   ·                        ───────────
   599 │     p,
   600 │     "application/javascript"
   601 │   ), l = await W(
   ╰────
   
   × 'import.meta' cannot be used outside of module
   code.
   ╭─[632:1]
   632 │   }, p.readAsArrayBuffer(o);
   633 │ }), Re = async (o) => {
   634 │   let f = o;
   635 │   return typeof o > "u" ? new Uint8Array() : (typeof o ==
   "string" ? /data:_data\/([a-zA-Z]*);base64,([^"]*)/.test(o) ? f =
   atob(o.split(",")[1]).split("").map((s) => s.charCodeAt(0)) : f = await
   (await fetch(new URL(o, import.meta.url).href)).arrayBuffer() : (o
   instanceof File || o instanceof Blob) && (f = await Te(o)), new
   Uint8Array(f));
   ·
   
   ───────────
   636 │ }, Ae = /* @__PURE__ */ Object.freeze(/* @__PURE__ */
   Object.defineProperty({
   637 │   __proto__: null,
   638 │   defaultOptions: Se,
   ╰────
   
   
   Caused by:
   0: failed to parse input file
   1: Syntax Error while minifying
   dynamic/node_modules/react-audio-voice-recorder/dist/index-1c988149.js
   at Compiler.minifySync
   (/Users/kaifritsch/.meteor/packages/zodern_standard-minifier-js/.5.3.1.13xodu.yv0c3++os+web.browser+web.browser.legacy+web.cordova/plugin.fastMinifier.os/npm/node_modules/meteor/fastMinifier/node_modules/meteor-package-install-swc/.swc/node_modules/@swc/core/index.js:110:29)
   at Object.minifySync
   (/Users/kaifritsch/.meteor/packages/zodern_standard-minifier-js/.5.3.1.13xodu.yv0c3++os+web.browser+web.browser.legacy+web.cordova/plugin.fastMinifier.os/npm/node_modules/meteor/fastMinifier/node_modules/meteor-package-install-swc/.swc/node_modules/@swc/core/index.js:373:21)
   at MeteorBabelMinifier._minifyWithSwc
   (packages/fastMinifier_plugin.js:72:16)
   at MeteorBabelMinifier.minifyOneFile
   (packages/fastMinifier_plugin.js:121:19)
   at packages/zodern_caching-minifier.js:77:23
   at Function.Profile.time (packages/zodern_caching-minifier.js:34:5)
   at MeteorBabelMinifier.minifyFile
   (packages/zodern_caching-minifier.js:76:15)
   at packages/fastMinifier_plugin.js:183:27
   at Function.Profile.time (packages/fastMinifier_plugin.js:35:7)
   at packages/fastMinifier_plugin.js:182:17
   at Array.forEach (<anonymous>)
   at MeteorBabelMinifier.<anonymous> (packages/fastMinifier_plugin.js:163:9)
   at MeteorBabelMinifier.processFilesForBundle
   (packages/fastMinifier_plugin.js:31:21)
   
   
=> Your application has errors. Waiting for file change.

The reason seems to be a reference to import.meta in the package ffmpeg, which is dynamically imported by the package react-audio-voice-recorder

Its reproducible in a base meteor react app, with just react-audio-voice-recorder installed and imported. You mentioned on a meteor ticket that "Meteor has never supported import.meta", but since it is working in meteor 2.10 and also in 3.0.3 with the standard minifier, I thought it might be fixable in this case.

[juliandierker]

i reposted on this one in the meteor forum

https://forums.meteor.com/t/meteor-3-sourcemapping/63411