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Description
Which @angular/* package(s) are the source of the bug?
compiler
Is this a regression?
No
Description
Hi there 👋
In a micro-frontend architecture, our goal is to compile CSS utilities while relying on importmap to load all JavaScript. I'm not sure if I’ve missed a configuration step or if this is expected behavior.
However, in the Vite ecosystem, when using the option to externalize dependencies, all the CSS is correctly resolved, but the JavaScript is excluded from the import.
export default defineConfig((env) => {
return {
build: {
rollupOptions: {
external: ["bootstrap"],
},
},
});However, in the Angular environment, this approach causes the build to fail because it can't locate the CSS.
"projects": {
"test-angular": {
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:application",
"options": {
"externalDependencies": ["bootstrap"],To isolate the issue, I created a minimal reproduction using Bootstrap.
Thank you very much for the awesome work 🚀
Please provide a link to a minimal reproduction of the bug
https://github.com/Tragio/angular-externalize-repro
Please provide the exception or error you saw
> ng build
Application bundle generation failed. [1.968 seconds]
✘ [ERROR] Can't find stylesheet to import.
╷
2 │ @use "bootstrap/scss/bootstrap";
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
╵
src/styles.scss 2:1 root stylesheet [plugin angular-sass]
angular:styles/global:styles:1:8:
1 │ @import 'src/styles.scss';
╵ ~~~~~~~~~~~~~~~~~
Please provide the environment you discovered this bug in (run ng version)
Angular CLI: 19.2.14
Node: 22.14.0
Package Manager: npm 10.9.2
OS: darwin arm64
Angular: 19.2.14
... cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Package Version
---------------------------------------------------------
@angular-devkit/architect 0.1902.14
@angular-devkit/build-angular 19.2.14
@angular-devkit/core 19.2.14
@angular-devkit/schematics 19.2.14
@schematics/angular 19.2.14
rxjs 7.8.2
typescript 5.7.3
zone.js 0.15.1
Anything else?
No response
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Only reported by a handful of users who observe it rarelyOnly reported by a handful of users who observe it rarely