fix: support webpack-dev-server 6.x by dropping SockJS instanceof checks - #1046
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rtm-ctrlz
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Thank you guys! |
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WDS 6.0.0 removed the SockJSClient module, which broke WDSSocket.js's require() of it with a compile-time "Module not found" error. Detect the active client via duck-typing on `.sock`/`.client` instead of instanceof checks against imported client classes, which works unchanged across WDS 4/5/6 and needs no optional require. Also widen the webpack-dev-server peer range to include 6.x and extend the test harness/CI matrix to cover it.
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I ran into a CVE against some webpack component, can't remember now. Anyway I made it work with webpack 6 in the mean time. package.json: "overrides": {
"@pmmmwh/react-refresh-webpack-plugin": {
"webpack-dev-server": "^6.0.0"
}
},webpack.config.js resolve: {
alias: {
'webpack-dev-server/client/clients/SockJSClient$': 'webpack-dev-server/client/clients/WebSocketClient.js',
},Probably not wise though. But it cleared the CVE's for the time being until a new release. |
pmmmwh
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Sorry for taking a while with this; will get this released today! |
pmmmwh
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August 13, 2026 11:13
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@pmmmwh do you need to manually do something to publish a new version of the library with this fix? |
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Summary
webpack-dev-server6.0.0 removed the SockJS client, butsockets/WDSSocket.jsstill did a staticrequire('webpack-dev-server/client/clients/SockJSClient')and aninstanceofcheck against it. On WDS 6, that module path no longer resolves, so webpack fails to compile with:client.sock/client.clientinstead ofinstanceofchecks against imported client classes. This removes the need torequire()a module that may not exist, so there's no compile-time warning/error on any supported WDS version, and it works unchanged across WDS 4/5/6.webpack-dev-serverpeer dependency range to^4.8.0 || 5.x || 6.x.webpack-dev-server-v6dev alias,aliasWDSv6.js) and CI matrix to also run against WDS 6.Test plan
yarn lint/yarn format:checkyarn test --testPathIgnorePatterns conformance)yarn test conformance) — all 16 tests pass locally against WDS 4, WDS 5, and WDS 6 (WDS_VERSION=4|5|6)Fixes #1014