*ngFor需要为每个不同的对象提供1个btn，但将相似的对象值放在相同的btn中

objects = [
  { id: 1, name: 'Object A', value: 'Value A' },
  { id: 2, name: 'Object B', value: 'Value B' },
  { id: 3, name: 'Object C', value: 'Value C' },
];

<div *ngFor="let object of objects">
  <button>{{ object.name }}</button>
</div>

<div *ngFor="let object of objects">
  <button *ngIf="object.value === objects[0].value">{{ object.name }}</button>
</div>