With Webpack v5 I failed to run plotly.js, it requires additional stream and assert libs. The complete problem description is available here quasarframework/quasar#11229

As I was pointed Webpack v5 removed the Nodejs polyfills for the web client builds. It seems that plotly.js for the web client rely on Nodejs API , and I get errors saying that some packages are missing. These probably need to be addressed by the plotly.js communty.

For users, if you just want to run your app/website (with a bit of risk), then you can manually install node-polyfill-webpack-plugin which solves the problem.