René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Suggested workaround for content-projection in control flow blocks does not work","articleBody":"### Which @angular/* package(s) are the source of the bug?\n\ncompiler-cli, compiler\n\n### Is this a regression?\n\nNo\n\n### Description\n\nWhen having multiple root elements in a control flow block, the compiler gives a [friendly message](https://github.com/angular/angular/blob/b22677d761fd7af38ac27c7162837cdd9b93a750/packages/compiler-cli/src/ngtsc/typecheck/src/oob.ts#L579) suggesting to\n\u003e Split the content of the @case block across multiple @case blocks such that each one only has a single projectable node at its root.\n\nThis does however not seem to work as suggested (or it works but the message is unclear). In particular, this does not seem to work for `ng-content` with specific selector targets.\n\nSee example of reproducing [here](https://stackblitz.com/edit/stackblitz-starters-avyqjise?file=src%2Fmain.ts)\n\n\n\n### Please provide a link to a minimal reproduction of the bug\n\nhttps://stackblitz.com/edit/stackblitz-starters-avyqjise?file=src%2Fmain.ts\n\n### Please provide the exception or error you saw\n\nNo exception.\n\n### Please provide the environment you discovered this bug in (run `ng version`)\n\n```true\nAngular CLI: 18.0.0\nNode: 20.14.0\nPackage Manager: yarn 3.4.1\nOS: win32 x64\n\nAngular: 18.2.1\n... animations, cdk, common, compiler, compiler-cli, core, forms\n... language-service, material, material-moment-adapter\n... platform-browser, platform-browser-dynamic, router\n\nPackage                         Version\n---------------------------------------------------------\n@angular-devkit/architect       0.1802.1\n@angular-devkit/build-angular   18.2.1\n@angular-devkit/core            18.2.1\n@angular-devkit/schematics      18.2.1\n@angular/cli                    18.0.0\n@schematics/angular             18.2.1\nrxjs                            7.8.1\ntypescript                      5.5.4\nwebpack                         5.91.0\nzone.js                         0.14.6\n```\n\n### Anything else?\n\n_No response_","author":{"url":"https://github.com/kklocker","@type":"Person","name":"kklocker"},"datePublished":"2025-01-07T12:56:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/59398/angular/issues/59398"}