{"id":17382332,"url":"https://github.com/usrrname/verbose-octo-goggles","last_synced_at":"2026-04-18T04:01:54.662Z","repository":{"id":167617588,"uuid":"643239322","full_name":"usrrname/verbose-octo-goggles","owner":"usrrname","description":"Reproduction of FASTTreeItem bug in Angular 15 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`FASTTreeItem` in Angular 15\n\nThis project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 15.\n\n# About\n\nThis is a reproduction of an issue involving use of the `ChildrenDirective` in FASTTreeItem and FASTTreeView leading to failure to render nested tree items in Angular.\n[#6740](https://github.com/microsoft/fast/issues/6740)\n\n\nConsole errors:\n```\nUncaught TypeError: Cannot read properties of undefined (reading 'fast-fmoaic-304-c')\n    at ChildrenDirective.getSource (node-observation.js:[60:22](https://github.com/microsoft/fast/blob/master/packages/web-components/fast-element/src/templating/node-observation.ts#L81))\n    at ChildrenDirective.handleEvent (children.js:[18:36](https://github.com/microsoft/fast/blob/master/packages/web-components/fast-element/src/templating/children.ts#L100))\n    at _ZoneDelegate.invoke (zone.js:372:26)\n    at Zone.runGuarded (zone.js:144:47)\n    at MutationObserver.\u003canonymous\u003e (zone.js:128:29)\n```\n\nThis reproduction uses Angular 15 and the following FAST packages:\n```\n\"@microsoft/fast-element\": \"2.0.0-beta.23\",\n\"@microsoft/fast-foundation\": \"3.0.0-alpha.27\",\n\"@microsoft/fast-web-utilities\": \"6.0.0\",\n```\n\n![console error with Children Directive](./src/assets/children-error.png)\n\n![code execution fails to continue at node-observation.js](src/assets/node-observation-error.png)\n\n![](src/assets/children-directive-err.png)\n\n![screenshot of erroneous behavior](src/assets/treeitem-error.png)\n![screenshot of erroneous behavior](src/assets/treeview.png)\n\n\n## Development server\n\nRun `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The application will automatically reload if you change any of the source files.\n\n## Code scaffolding\n\nRun `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.\n\n## Build\n\nRun `ng build` to build the project. The build artifacts will be stored in the `dist/` directory.\n\n## Running unit tests\n\nRun `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).\n\n## Running end-to-end tests\n\nRun `ng e2e` to execute the end-to-end tests via a platform of your choice. To use this command, you need to first add a package that implements end-to-end testing capabilities.\n\n## Further help\n\nTo get more help on the Angular CLI use `ng help` or go check out the [Angular CLI Overview and Command Reference](https://angular.io/cli) page.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fusrrname%2Fverbose-octo-goggles","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fusrrname%2Fverbose-octo-goggles","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fusrrname%2Fverbose-octo-goggles/lists"}