how to use SheetJS (js-xlsx) in angular 2

Question

I\'m learning angular2 and i wanted to use js-xlsx library in my project.

I installed xlsx npm install xlsx and jszip npm install jszip an

Answer 1

The following is a working component who exports an xlsx file from an array of objects using js-xlsx lib on Angular 2/4:

import { Component, OnInit } from '@angular/core';

import { utils, write, WorkBook } from 'xlsx';

import { saveAs } from 'file-saver';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  title = 'app';
  table = [
    {
      First: 'one',
      Second: 'two',
      Third: 'three',
      Forth: 'four',
      Fifth: 'five'
    },
    {
      First: 'un',
      Second: 'deux',
      Third: 'trois',
      Forth: 'quatre',
      Fifth: 'cinq'
    },
  ];

  ngOnInit() {
    const ws_name = 'SomeSheet';
    const wb: WorkBook = { SheetNames: [], Sheets: {} };
    const ws: any = utils.json_to_sheet(this.table);
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
    const wbout = write(wb, { bookType: 'xlsx', bookSST: true, type: 
'binary' });

function s2ab(s) {
  const buf = new ArrayBuffer(s.length);
  const view = new Uint8Array(buf);
  for (let i = 0; i !== s.length; ++i) {
    view[i] = s.charCodeAt(i) & 0xFF;
  };
  return buf;
}

saveAs(new Blob([s2ab(wbout)], { type: 'application/octet-stream' }), 'exported.xlsx');
  }
}

You have to install xlsx and file-saver for this to work.

For the working example on exporting a xlsx file from an array of jsons on Angular2/4:

https://github.com/bogdancar/xlsx-json-to-xlsx-demo-Angular2