feat(core): split exports by browser/server for bundle size by isaacs · Pull Request #20435 · getsentry/sentry-javascript

isaacs · 2026-04-21T23:37:00Z

Split the exports from @sentry/core into three options:

@sentry/core, the default (unchanged)
@sentry/core/browser, containing only shared and browser-specific
functionality, nothing server-specific.
@sentry/core/server, containing only shared and server-specific
functionality, nothing browser-specific.

This allows us to make the bundle sizes quite a bit smaller in our
browser SDKs where this is important, while adding more functionality to
our server-specific SDKs, in @sentry/core where they can be easily
shared across runtimes.

fix: #20434
fix: JS-2243

linear-code · 2026-04-21T23:37:04Z

JS-2243 Split @sentry/core exports up, adding ./server and ./browser exports

github-actions · 2026-04-22T03:15:03Z

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	26.16 kB	-	-
@sentry/browser - with treeshaking flags	24.63 kB	-	-
@sentry/browser (incl. Tracing)	44.13 kB	-	-
@sentry/browser (incl. Tracing + Span Streaming)	46.34 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	49.08 kB	-	-
@sentry/browser (incl. Tracing, Replay)	83.48 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	72.96 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	88.15 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	100.8 kB	-	-
@sentry/browser (incl. Feedback)	43.4 kB	-	-
@sentry/browser (incl. sendFeedback)	30.96 kB	-	-
@sentry/browser (incl. FeedbackAsync)	36.14 kB	-	-
@sentry/browser (incl. Metrics)	27.44 kB	-	-
@sentry/browser (incl. Logs)	27.59 kB	-	-
@sentry/browser (incl. Metrics & Logs)	28.28 kB	-	-
@sentry/react	27.9 kB	-	-
@sentry/react (incl. Tracing)	46.36 kB	-	-
@sentry/vue	31.03 kB	-	-
@sentry/vue (incl. Tracing)	45.96 kB	-	-
@sentry/svelte	26.18 kB	-	-
CDN Bundle	28.85 kB	+0.03%	+7 B 🔺
CDN Bundle (incl. Tracing)	46.91 kB	-0.01%	-1 B 🔽
CDN Bundle (incl. Logs, Metrics)	30.27 kB	-0.02%	-6 B 🔽
CDN Bundle (incl. Tracing, Logs, Metrics)	48.03 kB	+0.01%	+4 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics)	69.35 kB	-0.01%	-3 B 🔽
CDN Bundle (incl. Tracing, Replay)	84.07 kB	+0.01%	+1 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	85.14 kB	-0.01%	-1 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback)	89.86 kB	+0.01%	+1 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	90.96 kB	-0.01%	-2 B 🔽
CDN Bundle - uncompressed	84.55 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	140.16 kB	-	-
CDN Bundle (incl. Logs, Metrics) - uncompressed	88.75 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	143.62 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	212.71 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	257.96 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	261.41 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	271.66 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	275.1 kB	-	-
@sentry/nextjs (client)	48.85 kB	-	-
@sentry/sveltekit (client)	44.58 kB	-	-
@sentry/node-core	59.06 kB	+0.02%	+10 B 🔺
@sentry/node	170.35 kB	+0.01%	+13 B 🔺
@sentry/node - without tracing	96.92 kB	+0.02%	+10 B 🔺
@sentry/aws-serverless	113.78 kB	+0.03%	+30 B 🔺
@sentry/cloudflare (withSentry) - minified	164.96 kB	-	-
@sentry/cloudflare (withSentry)	417.1 kB	-	-

View base workflow run

Split the exports from `@sentry/core` into three options: - `@sentry/core`, the default (unchanged) - `@sentry/core/browser`, containing _only_ shared and browser-specific functionality, nothing server-specific. - `@sentry/core/server`, containing _only_ shared and server-specific functionality, nothing browser-specific. This should allow us to make the bundle sizes quite a bit smaller in our browser SDKs where this is important, while adding more functionality to our server-specific SDKs, in `@sentry/core` where they can be easily shared across runtimes. Integration may require updating our `tsconfig` settings so that tsc knows it is allowed to look on `package.json` exports. fix: #20434 fix: JS-2243

timfish

I looked through most of the changed files.

I guess this doesn't deprecate the old root exports yet?

Split the exports from `@sentry/core` into three options: - `@sentry/core`, the default (unchanged) - `@sentry/core/browser`, containing _only_ shared and browser-specific functionality, nothing server-specific. - `@sentry/core/server`, containing _only_ shared and server-specific functionality, nothing browser-specific. This should allow us to make the bundle sizes quite a bit smaller in our browser SDKs where this is important, while adding more functionality to our server-specific SDKs in `@sentry/core`, where they can more easily be shared across runtimes. Some integration requires updating `tsconfig` settings so that tsc knows it is allowed to look up `package.json` exports. fix: #20434 fix: JS-2243

Split the exports from `@sentry/core` into three options: - `@sentry/core`, the default (unchanged) - `@sentry/core/browser`, containing _only_ shared and browser-specific functionality, nothing server-specific. - `@sentry/core/server`, containing _only_ shared and server-specific functionality, nothing browser-specific. This should allow us to make the bundle sizes quite a bit smaller in our browser SDKs where this is important, while adding more functionality to our server-specific SDKs in `@sentry/core`, where they can more easily be shared across runtimes. Some integration requires updating `tsconfig` settings so that tsc knows it is allowed to look up `package.json` exports. In particular, we cannot use the `module: "node"` option, or `moduleResolution: "node"`. In many cases, this means either using `module: "esnext"` and `moduleResolution: "bundler"`, so that tsc lets the bundler handle the assembly, or `nodenext` or `node16` for both `module` and `moduleResolution`. fix: #20434 fix: JS-2243

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Split the exports from `@sentry/core` into three options: - `@sentry/core`, the default (unchanged) - `@sentry/core/browser`, containing _only_ shared and browser-specific functionality, nothing server-specific. - `@sentry/core/server`, containing _only_ shared and server-specific functionality, nothing browser-specific. This should allow us to make the bundle sizes quite a bit smaller in our browser SDKs where this is important, while adding more functionality to our server-specific SDKs in `@sentry/core`, where they can more easily be shared across runtimes. Some integration requires updating `tsconfig` settings so that tsc knows it is allowed to look up `package.json` exports. In particular, we cannot use the `module: "node"` option, or `moduleResolution: "node"`. In many cases, this means either using `module: "esnext"` and `moduleResolution: "bundler"`, so that tsc lets the bundler handle the assembly, or `nodenext` or `node16` for both `module` and `moduleResolution`. fix: #20434 fix: JS-2243

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch 6 times, most recently from 143a2a5 to 1494709 Compare April 22, 2026 01:45

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch 5 times, most recently from d5dddbf to 8eba1e9 Compare April 22, 2026 18:26

isaacs marked this pull request as ready for review April 22, 2026 18:26

cursor Bot reviewed Apr 22, 2026

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Comment thread dev-packages/rollup-utils/utils.mjs Outdated

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 8eba1e9 to 8ea4f5c Compare April 22, 2026 18:50

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Comment thread dev-packages/rollup-utils/npmHelpers.mjs

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 8ea4f5c to 787f44b Compare April 22, 2026 19:19

isaacs enabled auto-merge (rebase) April 22, 2026 19:19

isaacs disabled auto-merge April 22, 2026 19:19

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 787f44b to 7076f7c Compare April 22, 2026 19:20

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Comment thread packages/core/src/shared-exports.ts

Comment thread packages/core/src/integrations/http/client-subscriptions.ts Outdated

isaacs requested review from mydea and timfish April 23, 2026 14:24

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 7076f7c to e2cf052 Compare April 23, 2026 14:34

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from e2cf052 to 67bf5c4 Compare April 23, 2026 14:41

sentry Bot reviewed Apr 23, 2026

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Comment thread packages/node-core/src/integrations/http/SentryHttpInstrumentation.ts Outdated

timfish reviewed Apr 23, 2026

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mydea reviewed Apr 24, 2026

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Comment thread dev-packages/e2e-tests/test-applications/aws-serverless-layer/tests/layer.test.ts

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Comment thread packages/astro/tsconfig.json Outdated

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isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 67bf5c4 to 2cf15db Compare April 29, 2026 16:41

isaacs requested review from a team as code owners April 29, 2026 16:41

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 2cf15db to c1c9cf0 Compare April 29, 2026 16:46

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Comment thread packages/core/src/integrations/http/client-patch.ts Outdated

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isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from c1c9cf0 to 5beb2e3 Compare April 29, 2026 17:22

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 5beb2e3 to ca38b53 Compare April 29, 2026 20:43

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isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from ca38b53 to 24304fe Compare April 29, 2026 20:52

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Comment thread packages/solidstart/test/server/errorboundary.test.tsx Outdated

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 24304fe to da8cd5a Compare April 29, 2026 21:07

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from da8cd5a to 8fe31cb Compare April 29, 2026 21:19

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 8fe31cb to 28b47ec Compare April 30, 2026 00:05

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Comment thread packages/core/src/server-exports.ts

isaacs force-pushed the isaacschlueter/split-server-browser-core-exports branch from 28b47ec to a783c2e Compare April 30, 2026 00:25

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feat(core): split exports by browser/server for bundle size#20435

feat(core): split exports by browser/server for bundle size#20435
isaacs wants to merge 1 commit intodevelopfrom
isaacschlueter/split-server-browser-core-exports

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