fix: Add browser field in package.json so react-dom/server stays out of browser bundles#343
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guzmanvig merged 1 commit intoJul 17, 2026
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…bundles
The npm entry (dist/index.js) externalizes node_modules, so the lazy
require("react-dom/server") in Viewer.renderToString survived into the shipped
bundle. Any bundler resolving seqviz via main was then forced to resolve
react-dom/server, pulling Node-only SSR code into browser bundles (#293).
- Extract shared render/setState logic into src/baseViewer.ts (createBaseViewer;
imports only react + react-dom/client, never react-dom/server).
- Rebuild the node entry (src/index.ts) on the shared core, keeping the lazy
require("react-dom/server") for renderToString. Output behavior unchanged.
- Add src/index.browser.ts: same exports, but Viewer returns only
{ render, setState } and has no path to react-dom/server.
- webpack: rename npmBuild -> nodeBuild, add browserBuild -> dist/index.browser.js.
- package.json: add browser field + exports map with per-condition types
(browser -> dist/index.browser.d.ts, no renderToString). Legacy main/browser/
types/unpkg fields retained; ./dist/* keeps deep imports working.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Author
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Additionally we can consider just reexporting the React components, and dropping the Viewer function in the browser build |
Collaborator
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@jjti any thoughts on this? |
Author
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Hi @guzmanvig @jjti How do we want to move forward so we only use pure browser package on browser side? |
Collaborator
Hey, sorry for the delay on this. I'll be merging this and a few other oustanding PRs and making a release today |
guzmanvig
approved these changes
Jul 17, 2026
Collaborator
|
@smeng9 just released a new version that contains this and other fixes (https://github.com/Lattice-Automation/seqviz/releases/tag/3.10.24) |
Author
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Thanks! |
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Fixes: #293
Replaces: #294
With the fix in #294 we still encounter issues in module-federation, and module-federation loader crashes because it cannot provide
react-dom/serverin the browser.Module federation's remote build will try to hoist all reqire() dependencies in the code, (regardless of lazy or not, see https://npmx.dev/package-code/seqviz/v/3.10.22/dist%2Findex.js#L7137) and we shouldn't include the SSR
react-dom/serverin the browser build.It is better to create a browser only build with no react-dom/server following the option B in #293