如何在使用global.getData的angular中没有数据时不加载api

import { Component, OnInit } from '@angular/core';
import { ApiService } from 'your-api-service';

@Component({
  selector: 'app-your-component',
  templateUrl: './your-component.component.html',
  styleUrls: ['./your-component.component.css']
})
export class YourComponent implements OnInit {
  data: any;

  constructor(private apiService: ApiService) { }

  ngOnInit(): void {
    if (/* 判断是否需要加载API */) {
      this.apiService.getData().subscribe((response: any) => {
        this.data = response;
      });
    }
  }
}

<div *ngIf="data">
  <!-- 展示数据的代码 -->
</div>