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May 6, 2016 16:07
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Pipes in Angular from @AysegulYonet at #ngConf
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PurePipe -- A _stateless_ pipe -- @Pipe({ name: 'filter', pure: false }) -- revert to watch for _any_ change | |
// Impure pipes | |
@component({ | |
selector: 'activities', | |
template: `<span>Last modified</span><p>{{ activities | async }}</p>` | |
}) | |
class ActivitiesComponent { | |
activities: Observable<array>; | |
} |
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// Create a custom pipe | |
import {Pipe,PipeTransform} from 'angular2/core' | |
@Pipe({ | |
name: 'filterName' | |
}) | |
export class FilterPipe { | |
transofrm(files: string[], filterBy) { | |
if (files) { | |
return filteredFiles; | |
} | |
} | |
} | |
// Usage | |
Component({ | |
selector: 'task', | |
template: ` | |
<tr ngForm="let file in files | filterBy:owner"> | |
<td>{{ file }}</td> | |
</tr>`, | |
pipes: [FilterPipe] | |
}) |
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