angular ForkJoin实现多异步请求结束后执行某些操作（demo）

ForkJoin实现多异步请求结束后执行某些操作

1.引入

import { forkJoin } from 'rxjs';

2.应用

 const requests = [];
    _.forEach(files, file => {
      requests.push(this.fileService.uploadFile(file));
    });
    forkJoin(requests).subscribe(fileInfos => {
      console.log(fileInfos);
    });

2.普通两个异步请求

forkJoin([
      this.projectService.getMilestones(),
      this.projectService.getPlans({ code: this.project.code })
    ]).subscribe(results => {
        const milestones = results[0];
        let plans = results[1];
  });