Issue while upgrading an npm module

[jwu-leparisien]

Hello,

We’re currently working on the PB Engine v6 → v7 migration, and we’re running into an issue while updating a dependency (date-fns).
Until now we were using v2.30.0, and we’ve updated our code to use v4.1.0.

When running the npx fusion zip or npm start command, we get the following error:

'(bundle-js-combinations-server) ./bundle/node_modules/date-fns/formatDistanceStrict.js 102:25\n' +
fusion-verify  |     'Module parse failed: Unexpected token (102:25)\n' +
fusion-verify  |     'You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders\n' +
fusion-verify  |     '| export function formatDistanceStrict(laterDate, earlierDate, options) {\n' +
fusion-verify  |     '|   const defaultOptions = getDefaultOptions();\n' +
fusion-verify  |     '>   const locale = options?.locale ?? defaultOptions.locale ?? defaultLocale;\n' +
fusion-verify  |     '| \n' +
fusion-verify  |     '|   const comparison = compareAsc(laterDate, earlierDate);\n' +
fusion-verify  |     ' @ ./bundle/node_modules/date-fns/index.js 68:0-42 68:0-42\n' +
fusion-verify  |     ' @ ./bundle/src/components/features/rss-light/xml.js\n' +
fusion-verify  |     ' @ ./bundle/generated/components/combinations/xml.server.js',
fusion-verify  |   '(bundle-js-combinations-server) ./bundle/node_modules/date-fns/intlFormat.js 111:47\n' +
fusion-verify  |     'Module parse failed: Unexpected token (111:47)\n' +
fusion-verify  |     'You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders\n' +

It looks like optional chaining (?.) and nullish coalescing (??) aren’t being interpreted during the build.

fusion-webpack  | Version: webpack 4.47.0
node v22.21.1 / npm 11.8.0

• Do you have any tips on how we can resolve this ?
• Is it possible to upgrade the webpack version ?

Thanks

[radominchev]

👋 @jwu-leparisien, could you please rise a ticket with our support team.

Rado