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並前往https://books.google.com.tw/books?id=ZemvDwAAQBAJ&pg=PA33&lpg=PA33&dq=trackBy+ngFor&source=bl&ots=V2xuC9beh9&sig=ACfU3U2NWKWIoKs6ALVvZjIoR_y0yB60JA&hl=zh-TW&sa=X&ved=2ahUKEwjwgvqPnNz8AhUFnVwKHcyzAHsQ6AF6BQjMAhAD

Angular Projects: Build nine real-world applications from ...

Now, in app.component.html, we will add a for loop directive called *ngFor: <app-flash *ngFor="let flash of flashs; trackBy: trackByFlashId" ...

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