feat(modern-js): enbale asyncStartup by default by 2heal1 · Pull Request #4531 · module-federation/core

2heal1 · 2026-03-12T02:38:15Z

Description

enbale asyncStartup by default

Related Issue

Types of changes

Docs change / refactoring / dependency upgrade
Bug fix (non-breaking change which fixes an issue)
New feature (non-breaking change which adds functionality)

Checklist

I have added tests to cover my changes.
All new and existing tests passed.
I have updated the documentation.

- Add @rspack/core canary version to package.json overrides - Allow any @rspack/* peer dependencies - Fix indentation in config type definitions - Enable asyncStartup for rspack bundler when not explicitly disabled - Remove redundant enableAsyncEntry condition in source config

…rtup # Conflicts: # package.json # pnpm-lock.yaml

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pkg-pr-new · 2026-03-12T02:40:45Z

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create-module-federation

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@module-federation/data-prefetch

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@module-federation/dts-plugin

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commit: 0822d55

github-actions · 2026-03-12T02:41:50Z

Bundle Size Report

16 package(s) changed, 24 unchanged.

Package dist + ESM entry

Package	Total dist (raw)	Delta	ESM gzip	Delta
`@module-federation/bridge-react`	358.4 kB	+586 B (+0.2%)	1.3 kB	-4 B (-0.3%)
`@module-federation/bridge-vue3`	142.3 kB	+1.6 kB (+1.1%)	21.8 kB	+278 B (+1.3%)
`@module-federation/cli`	26.7 kB	no change	786 B	no change
`@module-federation/core`	39.1 kB	no change	173 B	no change
`@module-federation/devtools`	473.2 kB	-4551619 B (-90.4%)	3.9 kB	+3.9 kB (+∞%)
`@module-federation/enhanced`	810.8 kB	no change	712 B	no change
`@module-federation/managers`	69.9 kB	no change	334 B	no change
`@module-federation/manifest`	138.4 kB	no change	182 B	no change
`@module-federation/metro-plugin-rnc-cli`	0 B	no change	314 B	no change
`@module-federation/modern-js`	185.9 kB	+2.2 kB (+1.2%)	1.2 kB	no change
`@module-federation/modern-js-v3`	177.1 kB	+1.8 kB (+1.0%)	872 B	no change
`@module-federation/node`	189.2 kB	no change	217 B	no change
`@module-federation/runtime`	19.5 kB	+13 B (+0.1%)	616 B	no change
`@module-federation/runtime-core`	251.3 kB	+1.9 kB (+0.8%)	477 B	no change
`@module-federation/storybook-addon`	76.5 kB	no change	100 B	no change
`@module-federation/utilities`	110.6 kB	no change	328 B	no change

Bundle targets

Package	Web bundle (gzip)	Delta	Node bundle (gzip)	Delta
`@module-federation/bridge-react`	17.1 kB	+41 B (+0.2%)	17.6 kB	+31 B (+0.2%)
`@module-federation/bridge-vue3`	16.6 kB	+230 B (+1.4%)	16.4 kB	+214 B (+1.3%)
`@module-federation/cli`	2.3 kB	-32 B (-1.4%)	2.3 kB	-32 B (-1.4%)
`@module-federation/core`	1.1 kB	-30 B (-2.7%)	1.0 kB	-29 B (-2.7%)
`@module-federation/devtools`	20.8 kB	n/a	20.8 kB	n/a
`@module-federation/enhanced`	5.9 kB	-56 B (-0.9%)	5.9 kB	-56 B (-0.9%)
`@module-federation/managers`	2.4 kB	-25 B (-1.0%)	2.4 kB	-25 B (-1.0%)
`@module-federation/manifest`	6.2 kB	-36 B (-0.6%)	6.2 kB	-36 B (-0.6%)
`@module-federation/metro-plugin-rnc-cli`	411 B	-24 B (-5.5%)	411 B	-24 B (-5.5%)
`@module-federation/modern-js`	4.7 kB	+68 B (+1.4%)	4.7 kB	+68 B (+1.4%)
`@module-federation/modern-js-v3`	4.5 kB	+63 B (+1.4%)	4.5 kB	+63 B (+1.4%)
`@module-federation/node`	9.2 kB	-27 B (-0.3%)	9.2 kB	-27 B (-0.3%)
`@module-federation/runtime`	625 B	no change	625 B	no change
`@module-federation/runtime-core`	13.6 kB	+242 B (+1.8%)	13.4 kB	+221 B (+1.6%)
`@module-federation/storybook-addon`	1.9 kB	-23 B (-1.2%)	1.7 kB	-23 B (-1.3%)
`@module-federation/utilities`	2.6 kB	-30 B (-1.1%)	2.6 kB	-30 B (-1.1%)

Consumer scenarios

Scenario	Web output (gzip)	Delta	Node output (gzip)	Delta	Gap (node-web)	Delta
Enhanced remoteEntry	19.2 kB	+187 B (+1.0%)	20.3 kB	+163 B (+0.8%)	+1.0 kB	-24 B

Total dist (raw): 6.30 MB (-4543340 B (-40.8%))
Total ESM gzip: 73.2 kB (+4.2 kB (+6.1%))
Total web bundle (gzip): 180.2 kB (+21.2 kB (+13.3%))
Total node bundle (gzip): 180.7 kB (+21.1 kB (+13.2%))
Tracked ./bundler entry gzip: 556 B (no change)
Tracked ./bundler web bundle (gzip): 4.5 kB (no change)
Tracked ./bundler node bundle (gzip): 4.5 kB (no change)

Bundle sizes are generated with rslib (Rspack). Package-root metrics preserve the historical report. Tracked subpath exports such as ./bundler are measured separately so ENV_TARGET-driven tree-shaking is visible. Bare imports are externalized to keep package-level sizes consistent, and assets are emitted as resources.

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chatgpt-codex-connector · 2026-03-12T02:45:47Z

packages/modernjs/src/cli/configPlugin.ts

+        modernjsConfig.source?.enableAsyncEntry !== true &&
+        targetMFConfig.experiments?.asyncStartup !== false


Base asyncStartup default on resolved async-entry setting

The new guard ties experiments.asyncStartup to the raw modernjsConfig.source?.enableAsyncEntry value, but this plugin later defaults enableAsyncEntry to true for Rspack in api.config. As a result, two effectively equivalent configs behave differently: leaving enableAsyncEntry unset turns asyncStartup on, while explicitly setting enableAsyncEntry: true turns it off. That means projects already pinning enableAsyncEntry: true will silently miss the new default async startup path.

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changeset-bot · 2026-03-12T04:03:00Z

🦋 Changeset detected

Latest commit: a7d2ced

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@module-federation/modern-js	Patch

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2heal1 and others added 8 commits December 23, 2025 17:32

fix: adjust infer bundlerType timing

64f4346

fix: lockfile

3ed2c77

fix: build config

9848c26

chore: fix lockfile

735a230

chore: add changeset

03a19c1

Merge remote-tracking branch 'origin/main' into feat/rspack-async-sta…

b08678a

…rtup # Conflicts: # package.json # pnpm-lock.yaml

chore: merge main

cdf288c

github-actions bot added the change: feat label Mar 12, 2026

chatgpt-codex-connector bot reviewed Mar 12, 2026

View reviewed changes

Merge branch 'main' into feat/rspack-async-startup

de55fea

ScriptedAlchemy approved these changes Mar 12, 2026

View reviewed changes

2heal1 temporarily deployed to npm March 12, 2026 05:18 — with GitHub Actions Inactive

2heal1 added 2 commits March 12, 2026 14:05

feat: support in modern-js -v3

af63c07

feat: rename build script and add build:devtool for clarity

04d8bea

2heal1 temporarily deployed to npm March 12, 2026 11:24 — with GitHub Actions Inactive

ScriptedAlchemy and others added 2 commits March 12, 2026 19:30

Merge branch 'main' into feat/rspack-async-startup

cb78810

fix: update e2e test commands to use build:devtool

a7d2ced

2heal1 merged commit 3d8b09c into main Mar 13, 2026
25 checks passed

2heal1 deleted the feat/rspack-async-startup branch March 13, 2026 09:17

2heal1 mentioned this pull request Mar 14, 2026

Release v2.2.0 #4541

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		modernjsConfig.source?.enableAsyncEntry !== true &&
		targetMFConfig.experiments?.asyncStartup !== false

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2heal1 commented Mar 12, 2026

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