jgoz / esbuild-side-effect-glob-issue

Repro for glob handling issue in sideEffects array

esbuild side-effect imports

Packages a and b are identical except that packages/a/package.json specifies "sideEffects": ["*.css"].

How to run

npm ci
npm test

Expected:

• out/app.css contains contents of both a.css and b.css, since a.css is marked as side-effect-having

Actual:

• out/app.css only contains contents of b.css

This appears to be caused by the root of the dependency graph containing a.css being considered side-effect-free and therefore any side-effect-having imports within the graph are being removed.

Comparing with webpack

npm run webpack

Inspecting out-webpack/app.css shows that both a.css and b.css are included.