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2026-07-13 12:25:07 +08:00

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## Build
As of March 2025, the build process is a little different from the jupyterlab
extension cookiecutter template. The build works as follows:
### labextension
1. esbuild produces a bundle in `dist/esm` with `src/index.js` as its entrypoint
2. `jupyter labextension build` packages that bundle, which is read from the
`main` field in `package.json`, into `dist/cjs`
3. the `dist/cjs` output is copied to the perspective-python package's `.data`
directory.
This means running `jupyter labextension build` or `watch` out-of-band from the
build script won't rebuild the labextension on its own; the `labextension` step
runs on the output of the esbuild step.