ng2-csv-downloader (Angular2 CSV Downloader): Simple Angular 2 Component for downloading any data as csv.

csv-downloader.ts

import {Component, Input, Output, EventEmitter, Renderer} from '@angular/core';
@Component({
  selector: 'csv-downloader',
  template: `
    <button class='btn btn-info' (click)="build()">{{downloaderName}}</button>
  `
})
export class CsvDownloader {
  @Input() downloaderName: string = 'Download CSV';
  @Input() headers: string[] = [];
  @Input() data: any[] = [];
  @Input() fileName: string = 'data.csv';
  @Output() onError = new EventEmitter<Error>();

  constructor(private renderer: Renderer) {
  }

  build() {
    if (!this.data.length) {
      this.onError.emit(new Error('Data not available.'));
      return;
    }

    let csvString = this.construct();
    this.buildDownloader(csvString);
  }

  private getDocumentBody(): any {
    return document.body;
  }

  private construct(): string {
    let tabText = '';
    const keys = Object.keys(this.data[0]);
    if (!this.headers.length) {
      // if no headers are passed, use data keys for headers
      this.headers = keys;
    }
    
    this.headers.forEach(h => {
      tabText += '"' + h + '",';
    });

    if (tabText.length > 0) {
      tabText = tabText.slice(0, -1);
      tabText += '\r\n';
    }
    
    this.data.forEach(d => {
      keys.forEach(k => {
        if (d.hasOwnProperty(k) && d[k] != null) {
          tabText += '"' + d[k] + '",';
        } else {
          tabText += '"",';
        }
      });

      tabText = tabText.slice(0, -1);
      tabText += '\r\n';
    });

    return tabText;
  }

  private buildDownloader(data) {
    let anchor = this.renderer.createElement(this.getDocumentBody(), 'a');
    this.renderer.setElementStyle(anchor, 'visibility', 'hidden');
    this.renderer.setElementAttribute(anchor, 'href', 'data:text/csv;charset=utf-8,' + encodeURIComponent(data));
    this.renderer.setElementAttribute(anchor, 'target', '_blank');
    this.renderer.setElementAttribute(anchor, 'download', this.fileName);

    setTimeout(() => {
      this.renderer.invokeElementMethod(anchor, 'click');
      this.renderer.invokeElementMethod(anchor, 'remove');
    }, 5);

  }
}