breaking: remove support for webpack 4 and webpack-dev-server 4 inside @cypress/webpack-preprocessor and @cypress/webpack-dev-server
#31506
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this will need to be @cypress/webpack-preprocessor@7 in Cypress 15
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@cypress/webpack-preprocessor and @cypress/webpack-dev-server
… webpack-batteries-included-preprocessor is webpack 5. both packages need a breaking version published (check the peerDeps in WBIP)" breaking: webpack/wds v4 is no longer supported in @cypress/webpack-dev-server update changelog and clean up comments
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going to merge this in with the semantic PR failure because we want a separate change item fro wbip and wds |
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@cypress/webpack-dev-server#31605Additional details
With Cypress 15, we have made the decision to remove support for Webpack 4. With Webpack 4 being no longer actively maintained and Webpack 5 being out for almost 5 years, we have made the decision to remove support for Webpack 4 from
@cypress/webpack-preprocessorand@cypress/webpack-dev-server. Additionally, we are removing Webpack Dev Server 4 support from@cypress/webpack-dev-serveras it is in maintenance mode and only receiving security updates.This change may be disruptive to some users, hence why we have a full migration guide to help users transition.
Steps to test
The system tests have been modified to error if a user has webpack 4 or webpack-dev-server 4 installed, which seem valuable since the usage is still somewhat high and we want to make sure to handle the error gracefully.
The other option is to test the built binaries against a
webpack/webpack-dev-server 4setup, which can be seen in this repo off of a few different branchesHow has the user experience changed?
Users will notice when scaffolding a webpack project in Cypress 15 that webpack 4 no longer fulfills the scafolded dependency list
If skipping this, or installing Cypress 15 with either Webpack 4 or Webpack Dev Server 4, the following errors with throw from the config instantiation
The only way to work around this is the method laid out in the migration guide, which I have tested in https://github.com/AtofStryker/cypress-webpack-4 on various branches
PR Tasks
cypress-documentation? chore: add webpack 4 removal guide cypress-documentation#6164type definitions?