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refactor(hot): drop the module map from the SSE payload#2349

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bjohansebas wants to merge 1 commit into
hot-middlewarefrom
fix/hot-module-map-stats
Open

refactor(hot): drop the module map from the SSE payload#2349
bjohansebas wants to merge 1 commit into
hot-middlewarefrom
fix/hot-module-map-stats

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@bjohansebas

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webpack-dev-server does not send module names over the wire: the HMR runtime logs module ids on apply. Align the SSE payload with that (name, action, time, hash, errors, warnings) instead of serializing a module id → name map that was only used for log cosmetics and was empty with the default stats options anyway.

Ref webpack/webpack-hot-middleware#452
Ref webpack/webpack-hot-middleware#306

Summary

What kind of change does this PR introduce?

Did you add tests for your changes?

Does this PR introduce a breaking change?

If relevant, what needs to be documented once your changes are merged or what have you already documented?

Use of AI

webpack-dev-server does not send module names over the wire: the HMR
runtime logs module ids on apply. Align the SSE payload with that
(name, action, time, hash, errors, warnings) instead of serializing a
module id → name map that was only used for log cosmetics and was
empty with the default stats options anyway.

Ref webpack/webpack-hot-middleware#452
Ref webpack/webpack-hot-middleware#306
@changeset-bot

changeset-bot Bot commented Jul 14, 2026

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⚠️ No Changeset found

Latest commit: 0e10134

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

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@codecov

codecov Bot commented Jul 14, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.53%. Comparing base (52f4d31) to head (0e10134).

Additional details and impacted files
@@                Coverage Diff                 @@
##           hot-middleware    #2349      +/-   ##
==================================================
- Coverage           93.57%   93.53%   -0.04%     
==================================================
  Files                   4        4              
  Lines                1182     1175       -7     
  Branches              354      353       -1     
==================================================
- Hits                 1106     1099       -7     
  Misses                 68       68              
  Partials                8        8              

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