var xlsx = require('xlsx.js');
var $ = require('jquery');
var data = [
  ['Person', 'Dogs'],
  ['a', 0],
  ['b', 1],
];
$('#save').on('click', function() {
  var file = {
    worksheets: [[]], // worksheets has one empty worksheet (array)
    creator: 'John Smith', created: new Date('8/16/2012'),
    lastModifiedBy: 'Larry Jones', modified: new Date(),
    activeWorksheet: 0
  }, w = file.worksheets[0]; // cache current worksheet
  w.name = '测试';
  w.data = data;
  window.location = xlsx(file).href();
});

//test read xlsx file
var xhr = new XMLHttpRequest();
xhr.open('GET', 'download.xlsx', true);

xhr.responseType = 'arraybuffer';

xhr.onload = function(e) {
  if (this.status == 200) {
    var uInt8Array = new Uint8Array(this.response);
    var i = uInt8Array.length;
    var binaryString = new Array(i);
    while (i--)
    {
      binaryString[i] = String.fromCharCode(uInt8Array[i]);
    }
    var data = binaryString.join('');

    var base64 = window.btoa(data);
    console.log(xlsx(base64).worksheets[0]);
    //[
    //[[{value: 'Person'}], [{value: 'Dogs'}]],
    //[[{value: 'a'}], [{value: '0'}]],
    //[[{value: 'b'}], [{value: '1'}]]
    //]
  }
};

xhr.send();