Angular 7，如何从输入导入的srt或csv文件中读取数据，并保存到数组中？

npm install @types/file-saver

import { Component, OnInit } from '@angular/core';
import { saveAs } from 'file-saver';

@Component({
  selector: 'app-file-reader',
  templateUrl: './file-reader.component.html',
  styleUrls: ['./file-reader.component.css']
})
export class FileReaderComponent implements OnInit {

  constructor() { }

  ngOnInit(): void {
  }

  onFileSelected(event: any): void {
    const file: File = event.target.files[0];
    const fileReader: FileReader = new FileReader();

    fileReader.onload = (e: any) => {
      const fileContent: string = e.target.result;
      // 处理文件内容，将其保存到数组中或进行其他操作
      const dataArray: string[] = fileContent.split('\n');
      console.log(dataArray);
    };

    fileReader.readAsText(file);
  }

}

import { saveAs } from 'file-saver';

...

onSave(): void {
  const dataArray: string[] = ['item1', 'item2', 'item3'];
  const csvContent: string = dataArray.join(',');

  const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8' });
  saveAs(blob, 'data.csv');
}